101
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Ueda K, Moseson DE, Pathak V, Taylor LS. Effect of Polymer Species on Maximum Aqueous Phase Supersaturation Revealed by Quantitative Nuclear Magnetic Resonance Spectroscopy. Mol Pharm 2021; 18:1344-1355. [PMID: 33595322 DOI: 10.1021/acs.molpharmaceut.0c01174] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The polymer used in an amorphous solid dispersion (ASD) formulation impacts the maximum achievable drug supersaturation. Herein, the effect of dissolved polymer on drug concentration in the aqueous phase when a drug-rich phase was generated by liquid-liquid phase separation (LLPS) was investigated for different polymers at various concentrations of drug and polymer. Solution nuclear magnetic resonance (NMR) spectroscopy revealed that polyvinylpyrrolidone (PVP), polyvinylpyrrolidone/vinyl acetate (PVP-VA), and hypromellose (HPMC) distributed into the ibuprofen (IBP)-rich phase formed by LLPS when the amorphous solubility of IBP was exceeded. The amount of polymer in the drug-rich phase increased for higher-molecular-weight grades of PVP and HPMC. Moreover, PVP-VA showed a greater extent of distribution into the IBP-rich phase compared to PVP, and this is attributed to its reduced hydrophilicity resulting from the incorporation of vinyl acetate monomers. Direct quantification by NMR measurements indicated that the IBP concentration in the aqueous phase decreased as the amount of polymer in the IBP-rich phase increased. This can be attributed to a reduction of the chemical potential of IBP in the IBP-rich phase. The reduction in dissolved IBP concentration was greater for the IBP/PVP-VA system compared to the IBP/HPMC system, as a result of more extensive drug-polymer interactions in the former system. The present study highlights the impact of polymer selection on the attainable supersaturation of the drug and the factors that need to be considered in the formulation of ASDs to obtain optimized in vivo performance.
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Affiliation(s)
- Keisuke Ueda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.,Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Dana E Moseson
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Vaibhav Pathak
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
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102
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Li F, Xin J, Shi Q. Diffusion-controlled and `diffusionless' crystal growth: relation between liquid dynamics and growth kinetics of griseofulvin. J Appl Crystallogr 2021. [DOI: 10.1107/s1600576720014636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Understanding how liquid dynamics govern crystallization is critical for maintaining the physical stability of amorphous pharmaceutical formulations. In the present study, griseofulvin (GSF), a classic antifungal drug, was used as the model system to investigate the correlations between crystal growth kinetics and liquid dynamics. The temperature dependence of the kinetic part of the bulk crystal growth in a supercooled liquid of GSF was weaker than that of the structural relaxation time τα and scaled as τα
−0.69. In the glassy state, GSF exhibited the glass-to-crystal (GC) growth behavior, whose growth rate was too fast to be under the control of the α-relaxation process. Moreover, from the perspective of τα, the GC growth of GSF also satisfied the general condition for GC growth to exist: D/u < 7 pm, where D is the diffusion coefficient and u the speed of crystal growth. Also compared were the fast surface crystal growth rates u
s and surface relaxation times τsurface predicted by the random first-order transition theory. Here, the surface crystal growth rate u
s of GSF exhibited a power-law dependence upon the surface structural relaxation time: u
s ∝ τsurface
−0.71, which was similar to that of the bulk growth rate and τα. These findings are important for understanding and predicting the crystallization of amorphous pharmaceutical solids both in the bulk and at the surface.
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103
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Ueda K, Taylor LS. Partitioning of surfactant into drug-rich nanodroplets and its impact on drug thermodynamic activity and droplet size. J Control Release 2021; 330:229-243. [DOI: 10.1016/j.jconrel.2020.12.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 11/16/2020] [Accepted: 12/13/2020] [Indexed: 02/08/2023]
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104
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Szabó E, Záhonyi P, Brecska D, Galata DL, Mészáros LA, Madarász L, Csorba K, Vass P, Hirsch E, Szafraniec-Szczęsny J, Csontos I, Farkas A, Van denMooter G, Nagy ZK, Marosi G. Comparison of Amorphous Solid Dispersions of Spironolactone Prepared by Spray Drying and Electrospinning: The Influence of the Preparation Method on the Dissolution Properties. Mol Pharm 2021; 18:317-327. [PMID: 33301326 PMCID: PMC7788570 DOI: 10.1021/acs.molpharmaceut.0c00965] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 12/02/2022]
Abstract
This research aimed to compare two solvent-based methods for the preparation of amorphous solid dispersions (ASDs) made up of poorly soluble spironolactone and poly(vinylpyrrolidone-co-vinyl acetate). The same apparatus was used to produce, in continuous mode, drug-loaded electrospun (ES) and spray-dried (SD) materials from dichloromethane and ethanol-containing solutions. The main differences between the two preparation methods were the concentration of the solution and application of high voltage. During electrospinning, a solution with a higher concentration and high voltage was used to form a fibrous product. In contrast, a dilute solution and no electrostatic force were applied during spray drying. Both ASD products showed an amorphous structure according to differential scanning calorimetry and X-ray powder diffraction results. However, the dissolution of the SD sample was not complete, while the ES sample exhibited close to 100% dissolution. The polarized microscopy images and Raman microscopy mapping of the samples highlighted that the SD particles contained crystalline traces, which can initiate precipitation during dissolution. Investigation of the dissolution media with a borescope made the precipitated particles visible while Raman spectroscopy measurements confirmed the appearance of the crystalline active pharmaceutical ingredient. To explain the micro-morphological differences, the shape and size of the prepared samples, the evaporation rate of residual solvents, and the influence of the electrostatic field during the preparation of ASDs had to be considered. This study demonstrated that the investigated factors have a great influence on the dissolution of the ASDs. Consequently, it is worth focusing on the selection of the appropriate ASD preparation method to avoid the deterioration of dissolution properties due to the presence of crystalline traces.
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Affiliation(s)
- Edina Szabó
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Petra Záhonyi
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Dániel Brecska
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Dorián L. Galata
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Lilla A. Mészáros
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Lajos Madarász
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Kristóf Csorba
- Department
of Automation and Applied Informatics, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Panna Vass
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Edit Hirsch
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Joanna Szafraniec-Szczęsny
- Department
of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
| | - István Csontos
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Attila Farkas
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Guy Van denMooter
- Department
of Pharmaceutical and Pharmacological Sciences, Drug Delivery and
Disposition, KU Leuven, Campus Gasthuisberg ON2, Herestraat
49 b921, 3000 Leuven, Belgium
| | - Zsombor K. Nagy
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - György Marosi
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics (BME), Műegyetem rkp. 3, H-1111 Budapest, Hungary
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105
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Minecka A, Tarnacka M, Jurkiewicz K, Hachuła B, Wrzalik R, Kamiński K, Paluch M, Kamińska E. Impact of the Chain Length and Topology of the Acetylated Oligosaccharide on the Crystallization Tendency of Naproxen from Amorphous Binary Mixtures. Mol Pharm 2020; 18:347-358. [PMID: 33355470 PMCID: PMC7872431 DOI: 10.1021/acs.molpharmaceut.0c00982] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The impact of the chain length or
dispersity of polymers in controlling
the crystallization of amorphous active pharmaceutical ingredients
(APIs) has been discussed for a long time. However, because of the
weak control of these parameters in the majority of macromolecules
used in pharmaceutical formulations, the abovementioned topic is poorly
understood. Herein, four acetylated oligosaccharides, maltose (acMAL),
raffinose (acRAF), stachyose (acSTA), and α-cyclodextrin (ac-α-CD)
of growing chain lengths and different topologies (linear vs cyclic), mimicking the growing backbone of the polymer,
were selected to probe the influence of these structural factors on
the crystallization of naproxen (NAP)—an API that does not
vitrify regardless of the cooling rate applied in our experiment.
It was found that in equimolar systems composed of NAP and linear
acetylated oligosaccharides, the progress and activation barrier for
crystallization are dependent on the molecular weight of the excipient
despite the fact that results of Fourier transform infrared studies
indicated that there is no difference in the interaction pattern between
measured samples. On the other hand, complementary dielectric, calorimetric,
and X-ray diffraction data clearly demonstrated that NAP mixed with
ac-α-CD (cyclic saccharide) does not tend to crystallize even
in the system with a much higher content of APIs. To explain this
interesting finding, we have carried out further density functional
theory computations, which revealed that incorporation of NAP into
the cavity of ac-α-CD is hardly possible because this state
is of much higher energy (up to 80 kJ/mol) with respect to the one
where the API is located outside of the saccharide torus. Hence, although
at the moment, it is very difficult to explain the much stronger impact
of the cyclic saccharide on the suppression of crystallization and
enhanced stability of NAP with respect to the linear carbohydrates,
our studies clearly showed that the chain length and the topology
of the excipient play a significant role in controlling the crystallization
of this API.
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Affiliation(s)
- Aldona Minecka
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Magdalena Tarnacka
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Karolina Jurkiewicz
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Barbara Hachuła
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
| | - Roman Wrzalik
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Kamil Kamiński
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Marian Paluch
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
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106
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Luo C, Wu W, Lou S, Zhao S, Yang K. Improving the in vivo bioavailability and in vitro anti-inflammatory activity of tanshinone IIA by alginate solid dispersion. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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107
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Clarification of the Dissolution Mechanism of an Indomethacin/Saccharin/Polyvinylpyrrolidone Ternary Solid Dispersion by NMR Spectroscopy. J Pharm Sci 2020; 109:3617-3624. [DOI: 10.1016/j.xphs.2020.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 12/23/2022]
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108
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Chen B, Wang X, Zhang Y, Huang K, Liu H, Xu D, Li S, Liu Q, Huang J, Yao H, Lin X. Improved solubility, dissolution rate, and oral bioavailability of main biflavonoids from Selaginella doederleinii extract by amorphous solid dispersion. Drug Deliv 2020; 27:309-322. [PMID: 32037895 PMCID: PMC7034131 DOI: 10.1080/10717544.2020.1716876] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Amentoflavone, robustaflavone, 2″,3″-dihydro-3′,3‴-biapigenin, 3′,3‴-binaringenin, and delicaflavone are five major hydrophobic components in the total biflavonoids extract from Selaginella doederleinii (TBESD) that display favorable anticancer properties. The purpose of this study was to develop a new oral delivery formulation to improve the solubilities, dissolution rates, and oral bioavailabilities of the main ingredients in TBESD by the solid dispersion technique. Solid dispersions of TBESD with various hydrophilic polymers were prepared, and different technologies were applied to select the suitable carrier and method. TBESD amorphous solid dispersion (TBESD-ASD) with polyvinylpyrrolidone K-30 was successfully prepared by the solvent evaporation method. The physicochemical properties of TBESD-ASD were investigated by scanning electron microscopy, differential scanning calorimetry, and Fourier-transform infrared spectroscopy. As a result, TBESD was found to be molecularly dispersed in the amorphous carrier. The solubilities and dissolution rates of all five ingredients in the TBESD-ASD were significantly increased (nearly 100% release), compared with raw TBESD. Meanwhile, TBESD-ASD showed good preservation stability for 3 months under accelerated conditions of 40 °C and 75% relative humidity. A subsequent pharmacokinetic study in rats revealed that Cmax and AUC0–t of all five components were significantly increased by the solid dispersion preparation. An in vivo study clearly revealed that compared to raw TBESD, a significant reduction in tumor size and microvascular density occurred after oral administration of TBESD-ASD to xenograft-bearing tumor mice. Collectively, the developed TBESD-ASD with the improved solubility, dissolution rates and oral bio-availabilities of the main ingredients could be a promising chemotherapeutic agent for cancer treatment.
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Affiliation(s)
- Bing Chen
- Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, China.,Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Xuewen Wang
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Yanyan Zhang
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Kangping Huang
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Hao Liu
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Dafen Xu
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Shaoguang Li
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Qicai Liu
- Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, China.,Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China
| | - Jianyong Huang
- Department of Pharmaceutical, Fujian Medical University Union Hospital, Fuzhou, China
| | - Hong Yao
- Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, Fujian Medical University, Fuzhou, China
| | - Xinhua Lin
- Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, China.,Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University, Fuzhou, China.,Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, China
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109
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Alshehri S, Imam SS, Hussain A, Altamimi MA, Alruwaili NK, Alotaibi F, Alanazi A, Shakeel F. Potential of solid dispersions to enhance solubility, bioavailability, and therapeutic efficacy of poorly water-soluble drugs: newer formulation techniques, current marketed scenario and patents. Drug Deliv 2020; 27:1625-1643. [PMID: 33207947 PMCID: PMC7737680 DOI: 10.1080/10717544.2020.1846638] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/30/2020] [Accepted: 11/01/2020] [Indexed: 12/29/2022] Open
Abstract
In the last few decades, solid dispersion (SD) technology had been studied as an approach to produce an amorphous carrier to enhance the solubility, dissolution rate, and bioavailability of poorly water-soluble drugs. The use of suitable carrier and methodology in the preparation of SDs play a significant role in the biological behavior of the SDs. SDs have been prepared using a variety of pharmaceutically acceptable polymers utilizing various novel technologies. In the recent years, much attention has been paid toward the use of novel carriers and methodologies in exploring novel types of SDs to enhance therapeutic efficacy and bioavailability. The use of novel carriers and methodologies would be very beneficial for formulation scientists to develop some SDs-based formulations for their commercial use and clinical applications. In the present review, current literature of novel methodologies for SD preparation to enhance the dissolution rate, solubility, therapeutic efficacy, and bioavailability of poorly water-soluble drugs has been summarized and analyzed. Further, the current status of SDs, patent status, and future prospects have also been discussed.
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Affiliation(s)
- Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- College of Pharmacy, Almaarefa University, Riyadh, Saudi Arabia
| | - Syed Sarim Imam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Afzal Hussain
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad A. Altamimi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Nabil K. Alruwaili
- Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka, Saudi Arabia
| | - Fahad Alotaibi
- General Directorate Health Affairs, Ministry of Health, Riyadh, Saudi Arabia
| | - Abdullah Alanazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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110
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Zhang Y, Gao Y, Du X, Guan R, He Z, Liu H. Combining Co-Amorphous-Based Spray Drying with Inert Carriers to Achieve Improved Bioavailability and Excellent Downstream Manufacturability. Pharmaceutics 2020; 12:pharmaceutics12111063. [PMID: 33171591 PMCID: PMC7695141 DOI: 10.3390/pharmaceutics12111063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/31/2020] [Accepted: 11/02/2020] [Indexed: 01/03/2023] Open
Abstract
It is crucial to improve poorly water-soluble orally administered drugs through both preclinical and therapeutic drug discovery. A co-amorphous formulation consisting of two low molecular weight (MW) molecules offers a solubility/dissolubility advantage over its crystalline form by maintaining their amorphous status. Here, we report on a co-amorphous solid dispersion (SD) system that includes inert carriers (lactose monohydrate or microcrystalline cellulose) and co-amorphous sacubitril (SAC)-valsartan (VAL) using the spray drying process. The strong molecular interactions between drugs were the driving force for forming robust co-amorphous SDs. Our system provided the highest solubility with more than ~11.5- and 3.12-times solubility increases when compared with the physical mixtures. Co-amorphous lactose monohydrate (LM) SDs showed better bioavailability of APIs (~356.27.8% and 154.01% for the relative bioavailability of LBQ 657 and valsartan, respectively). Co-amorphous inert carrier SDs possessed an excellent compressibility for the production of a direct compression pharmaceutical product. In conclusion, these brand-new co-amorphous SDs could reduce the number of unit processes to produce a final pharmaceutical product for downstream manufacturability.
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111
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Pardhi VP, Flora S. Stable solid dispersion of lurasidone hydrochloride with augmented physicochemical properties for the treatment of schizophrenia and bipolar disorder. Biopharm Drug Dispos 2020; 41:334-351. [PMID: 33080060 DOI: 10.1002/bdd.2252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 09/08/2020] [Accepted: 10/07/2020] [Indexed: 12/30/2022]
Abstract
Crystalline solid dispersion of lurasidone hydrochloride (LH) was made with various polar and non-polar small molecules to overcome the poor aqueous solubility issue. LH-Glutathione (GSH) solid dispersion in 1:1 ratio was prepared by co-grinding method and characterized by using differential scanning calorimetry (DSC), powder X-ray diffraction, Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. GSH acts as antioxidant and reported for anti-schizophrenic activity may provide synergistic action with LH or reduce the side effects. LH in LH-GSH solid dispersion (SD) has shown improvement in solubility by 7.9 folds than plain drug which translated in terms of improved dissolution rate by two-folds. The in vitro dissolution results showed maximum dissolution rate with LH-GSH SD (97.85 ± 2.40%) compared to plain drug (50.5 ± 3.02%) at 15 min (t15 min, %) and thus, satisfying criteria of immediate release dosage form. DSC and FTIR data confirmed the stability of LH-GSH SD for 3 months at accelerated stability condition (40 ± 2°C and 75 ± 5% RH). The prepared LH-GSH SD can be used as a tool to target dual problems that is, enhanced physicochemical properties along with possible management of disorder which could be due to synergism with co-administered GSH. This approach is thought to be efficiently providing the relief to the psychological patients.
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Affiliation(s)
- Vishwas P Pardhi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, India
| | - Swaran Flora
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, India
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112
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Chambers LI, Grohganz H, Palmelund H, Löbmann K, Rades T, Musa OM, Steed JW. Predictive identification of co-formers in co-amorphous systems. Eur J Pharm Sci 2020; 157:105636. [PMID: 33160046 DOI: 10.1016/j.ejps.2020.105636] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/13/2020] [Accepted: 10/29/2020] [Indexed: 11/30/2022]
Abstract
This work aims to understand the properties of co-formers that form co-amorphous pharmaceutical materials and to predict co-amorphous system formation. A partial least square - discriminant analysis (PLS-DA) was performed using known co-amorphous systems described by 36 variables based on the properties of the co-former and the binding energy of the system. The PLS-DA investigated the propensity to form co-amorphous material of the active pharmaceutical ingredients: mebendazole, carvedilol, indomethacin, simvastatin, carbamazepine and furosemide in combination with 20 amino acid co-formers. The variables that were found to favour the propensity to form co-amorphous systems appear to be a relatively large value for average molecular weight and the sum of the difference between hydrogen bond donors and hydrogen bond acceptors for both components, and a relatively small or negative value for excess enthalpy of mixing, excess enthalpy of hydrogen bonding and the difference in the Hansen parameter for hydrogen bonding of the coformer and the active pharmaceutical ingredient (API). To test the predictive power of this model, 29 potential co-formers were used to form either co-amorphous or crystalline two-component materials with mebendazole. Of these 29 two-component systems, the co-amorphous nature of a total of 26 materials was correctly predicted by the model, giving a predictive hit rate of 90 %.
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Affiliation(s)
- Luke I Chambers
- Durham University, Department of Chemistry, Lower Mountjoy, Stockton Road, Durham, DH1 3LE, UK
| | - Holger Grohganz
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Henrik Palmelund
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Osama M Musa
- Ashland LLC, 1005 Route 202/206, Bridgewater, NJ 08807, USA
| | - Jonathan W Steed
- Durham University, Department of Chemistry, Lower Mountjoy, Stockton Road, Durham, DH1 3LE, UK.
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113
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Polymer structure and property effects on solid dispersions with haloperidol: Poly(N-vinyl pyrrolidone) and poly(2-oxazolines) studies. Int J Pharm 2020; 590:119884. [DOI: 10.1016/j.ijpharm.2020.119884] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 02/08/2023]
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114
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Tomar D, Singh PK, Hoque S, Modani S, Sriram A, Kumar R, Madan J, Khatri D, Dua K. Amorphous systems for delivery of nutraceuticals: challenges opportunities. Crit Rev Food Sci Nutr 2020; 62:1204-1221. [PMID: 33103462 DOI: 10.1080/10408398.2020.1836607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Amorphous solid products have recently gained a lot of attention as key solutions to improve the solubility and bioavailability of poorly soluble nutraceuticals. A pure amorphous drug is a high-energy form; physically/chemically unstable and so easily gets recrystallized into the less soluble crystalline form limiting solubility and bioavailability issues. Amorphous solid dispersion and co-amorphous are new formulation approach that stabilized unstable amorphous form through different mechanisms such as preventing mobility, high glass transition temperature and molecular interaction. Nutraceuticals have been received the utmost importance due to their health benefits. However, most of these compounds have been associated with poor oral bioavailability due to poor solubility, high lipophilicity, high melting point, poor permeability, degradability and rapid metabolism in the gastrointestinal tract (GIT) which limits its health benefits. This review provides us a systematic application of amorphous systems to the delivery of poorly soluble nutraceuticals, with the aim of overcoming their pharmacokinetic limitations and improved pharmacological potential. In particular, it describes the challenges associated with delivery of oral nutraceuticals, various methods involved in the preparation and characterization of amorphous systems and permeability enhancement of nutraceuticals are in detail.
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Affiliation(s)
- Devendrasingh Tomar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Pankaj K Singh
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Sajidul Hoque
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Sheela Modani
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Anitha Sriram
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Rahul Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Jitender Madan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Dharmendra Khatri
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health (GSH), The University of Technology Sydney, Ultimo, Australia
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115
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Bioavailability Improvement of Carbamazepine via Oral Administration of Modified-Release Amorphous Solid Dispersions in Rats. Pharmaceutics 2020; 12:pharmaceutics12111023. [PMID: 33114739 PMCID: PMC7693946 DOI: 10.3390/pharmaceutics12111023] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 11/17/2022] Open
Abstract
The purpose of this study was to improve the bioavailability of carbamazepine (CBZ), a poorly water-soluble antiepileptic drug, via modified-release amorphous solid dispersions (mr-ASD) by a thin film freezing (TFF) process. Three types of CBZ-mr-ASD with immediate-, delayed-, and controlled-release properties were successfully prepared with HPMC E3 (hydrophilic), L100-55 (enteric), and cellulose acetate (CA, lipophilic), defined as CBZ-ir-ASD, CBZ-dr-ASD, and CBZ-cr-ASD, respectively. A dry granulation method was used to prepare CBZ-mr-ASD capsule formulations. Various characterization techniques were applied to evaluate the physicochemical properties of CBZ-mr-ASD and the related capsules. The drug remained in an amorphous state when encapsulated within CBZ-mr-ASD, and the capsule formulation progress did not affect the performance of the dispersions. In dissolution tests, the preparations and the corresponding dosage forms similarly showed typical immediate-, delayed-, and controlled-release properties depending on the solubility of the polymers. Moreover, single-dose 24 h pharmacokinetic studies in rats indicated that CBZ-mr-ASD significantly enhanced the oral absorption of CBZ compared to that of crude CBZ. Increased oral absorption of CBZ was observed, especially in the CBZ-dr-ASD formulation, which showed a better pharmacokinetic profile than that of crude CBZ with 2.63- and 3.17-fold improved bioavailability of the drug and its main active metabolite carbamazepine 10,11-epoxide (CBZ-E).
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116
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Mori D, Rathod P, Parmar R, Dudhat K, Chavda J. Preparation and optimization of multi-functional directly compressible excipient: an integrated approach of principal component analysis and design of experiments. Drug Dev Ind Pharm 2020; 46:2010-2021. [PMID: 33095675 DOI: 10.1080/03639045.2020.1841788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Developing a new excipient and obtaining its market approval is an expensive, time-consuming, and complex process. The application of a multivariate analytical approach - principal component analysis (PCA) - in combination with the design of experiments (DoE) approach can make the process of developing co-processed excipient cost-effective and rapid. The present investigation was aimed to demonstrate the applicability of the DoE approach and PCA in developing a co-processed excipient by using the spray drying technique. The preliminary studies suggested a significant effect of inlet air temperature (X 1) and polymer ratio [chitosan chlorhydrate (CC): mannitol - X 2) on critical product characteristics so they were selected as independent variables in 32 full factorial design. The result of regression analysis suggested a significant effect of both independent variables on all response variables. The PCA of practically obtained value suggested a strong effect of all the selected response variables on the model. The prepared co-processed excipient had better tableting properties compared to the physical mixture of excipients and was able to accommodate more than 80% drug without compromising the flow property and compressibility. The present investigation successfully proved the applicability PCA and DoE approach as an effective and rapid tool for optimizing process parameters and formulation composition for preparing a directly compressible co-processed excipient.
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Affiliation(s)
- Dhaval Mori
- Department of Pharmaceutics, B.K. Mody Government Pharmacy College, Rajkot, India
| | - Punit Rathod
- Department of Pharmaceutics, B.K. Mody Government Pharmacy College, Rajkot, India
| | - Ramesh Parmar
- Department of Pharmaceutics, B.K. Mody Government Pharmacy College, Rajkot, India
| | - Kiran Dudhat
- Department of Pharmaceutics, K. V. Virani Institute of Pharmacy and Research Centre, Badhada, India
| | - Jayant Chavda
- Department of Pharmaceutics, B.K. Mody Government Pharmacy College, Rajkot, India
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117
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Hempel NJ, Morsch F, Knopp MM, Berthelsen R, Löbmann K. The Use of Glycerol as an Enabling Excipient for Microwave-Induced In Situ Drug Amorphization. J Pharm Sci 2020; 110:155-163. [PMID: 33058897 DOI: 10.1016/j.xphs.2020.10.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 02/08/2023]
Abstract
Microwave-induced in situ amorphization is a promising approach to circumvent stability and manufacturing issues associated with amorphous solid dispersions (ASD). Using in situ amorphization, the crystalline state of the drug is converted into its amorphous form inside the dosage form, e.g. a compact, upon exposure to microwave radiation. The study aimed to investigate the feasibility of using glycerol as an enabling excipient in compacts prepared from mixtures of indomethacin and Soluplus®. Additionally, the possibility to form a supersaturated ASD upon exposure to microwave radiation due to elevated temperatures was investigated. It was found that glycerol i) acts as a dielectric heating source absorbing the microwaves, ii) plasticizes the polymer Soluplus® and iii) increases the solubility of the drug indomethacin in the polymer Soluplus®. Additionally, it was found that fully amorphous ASDs could be achieved with drug loadings below -, and slightly above the saturation solubility of indomethacin in the Soluplus®/glycerol mixtures, after exposure to 20 min of microwave radiation. Hence, glycerol was a feasible excipient for the microwave-induced in situ amorphization and allowed the preparation of a, at room temperature, supersaturated ASD, due to the elevated temperatures obtained during exposure to microwave radiation.
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Affiliation(s)
| | - Flemming Morsch
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | | | - Ragna Berthelsen
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark.
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118
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Shi Q, Li F, Yeh S, Wang Y, Xin J. Physical stability of amorphous pharmaceutical solids: Nucleation, crystal growth, phase separation and effects of the polymers. Int J Pharm 2020; 590:119925. [PMID: 33011255 DOI: 10.1016/j.ijpharm.2020.119925] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 01/03/2023]
Abstract
Compared to their crystalline forms, amorphous pharmaceutical solids present marvelous potential and advantages for effectively improving the oral bioavailability of poorly water-soluble drugs. A central issue in developing amorphous pharmaceutical solids is the stability against crystallization, which is particularly important for maintaining their advantages in solubility and dissolution rate. This review provides a comprehensive overview of recent studies focusing on the physical stability of amorphous pharmaceutical solids affected by nucleation, crystal growth, phase separation and the addition of polymers. Moreover, we highlight the novel technologies and theories in the field of amorphous pharmaceutical solids. Meanwhile, the challenges and strategies in maintaining the physical stability of amorphous pharmaceutical solids are also discussed. With a better understanding of physical stability, the more robust amorphous pharmaceutical formulations with desired pharmaceutical performance would be easier to achieve.
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Affiliation(s)
- Qin Shi
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China; Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
| | - Fang Li
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Stacy Yeh
- Department of Cancer Biology, School of Medicine, Wake Forest University, Winston Salem 27103, USA
| | - Yanan Wang
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Junbo Xin
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
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119
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Wang X, Zhang L, Ma D, Tang X, Zhang Y, Yin T, Gou J, Wang Y, He H. Characterizing and Exploring the Differences in Dissolution and Stability Between Crystalline Solid Dispersion and Amorphous Solid Dispersion. AAPS PharmSciTech 2020; 21:262. [PMID: 32975680 DOI: 10.1208/s12249-020-01802-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 08/25/2020] [Indexed: 12/23/2022] Open
Abstract
Solid dispersion is one of the most effective ways to improve the dissolution of insoluble drugs. When the carrier can highly disperse the drug, it will increase the wettability of the drug and reduce the surface tension, thus improving the solubility, dissolution, and bioavailability. However, amorphous solid dispersions usually have low drug loading and poor stability. Therefore, the goal of this work is to study the increased dissolution and high stability of high drug-loading crystalline solid dispersion (CSD), and the difference in dissolution and stability of high-loading and low-loading amorphous solid dispersion (ASD). A CSD of nimodipine with a drug loading of 90% was prepared by wet milling, with hydroxypropyl cellulose (model: HPC-SL) and sodium dodecyl sulfate as stabilizers and spray drying. At the same time, the gradient drug-loaded ASD was prepared by hot melt extrusion with HPC-SL as the carrier. Each preparation was characterized by DSC, PXRD, FT-IR, SEM, and in vitro dissolution testing. The results indicated that the drug in CSD existed in a crystalline state. The amorphous drug molecules in the low drug-loading ASD were uniformly dispersed in the carrier, while the drug state in the high drug-loading ASD was aggregates of the amorphous drug. At the end of the dissolution assay, the 90% drug-loading CSD increased cumulative dissolution to 60%, and the 10% drug-loading ASD achieved a cumulative dissolution rate of 90%.
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120
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Defrese MK, Farmer MA, Long Y, Timmerman LR, Bae Y, Marsac PJ. Approaches to Understanding the Solution-State Organization of Spray-Dried Dispersion Feed Solutions and Its Translation to the Solid State. Mol Pharm 2020; 17:4548-4563. [DOI: 10.1021/acs.molpharmaceut.0c00729] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew K. Defrese
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Matthew A. Farmer
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Yuhan Long
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Lucas R. Timmerman
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Younsoo Bae
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Patrick J. Marsac
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40506, United States
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121
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Han J, Wei Y, Lu Y, Wang R, Zhang J, Gao Y, Qian S. Co-amorphous systems for the delivery of poorly water-soluble drugs: recent advances and an update. Expert Opin Drug Deliv 2020; 17:1411-1435. [DOI: 10.1080/17425247.2020.1796631] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jiawei Han
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yuanfeng Wei
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yan Lu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Runze Wang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Jianjun Zhang
- School of Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Yuan Gao
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Shuai Qian
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
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122
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Ueda K, Hate SS, Taylor LS. Impact of Hypromellose Acetate Succinate Grade on Drug Amorphous Solubility and In Vitro Membrane Transport. J Pharm Sci 2020; 109:2464-2473. [DOI: 10.1016/j.xphs.2020.04.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/14/2020] [Accepted: 04/20/2020] [Indexed: 12/22/2022]
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123
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Shepard KB, Dower AM, Ekdahl AM, Morgen MM, Baumann JM, Vodak DT. Solvent-Assisted Secondary Drying of Spray-Dried Polymers. Pharm Res 2020; 37:156. [PMID: 32737611 PMCID: PMC7395053 DOI: 10.1007/s11095-020-02890-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/22/2020] [Indexed: 11/29/2022]
Abstract
Purpose The purpose of this work is to introduce solvent-assisted secondary drying, a method used to accelerate the residual solvent removal from spray dried materials. Spray-drying is used to manufacture amorphous solid dispersions, which enhance the bioavailability of active pharmaceutical ingredients (APIs) with low aqueous solubility. In the spray-drying process, API and excipients are co-dissolved in a volatile organic solvent, atomized into droplets through a nozzle, and introduced to a drying chamber containing heated nitrogen gas. The product dries rapidly to form a powder, but small amounts of residual solvent (typically, 1 to 10 wt%) remain in the product and must be removed in a secondary-drying process. For some spray-dried materials, secondary drying by traditional techniques can take days and requires balancing stability risks with process time. Methods Spray-dried polymers were secondary dried, comparing the results for three state-of-the-art methods that employed a jacketed, agitated-vessel dryer: (1) vacuum-only drying, (2) water-assisted drying, or (3) methanol-assisted drying. Samples of material were pulled at various time points and analyzed by gas chromatography (GC) and Karl Fischer (KF) titration to track the drying process. Results Model systems were chosen for which secondary drying is slow. For all cases studied, methanol-assisted drying outperformed the vacuum-only and water-assisted drying methods. Conclusions The observation that methanol-assisted drying is more effective than the other drying techniques is consistent with the free-volume theory of solvent diffusion in polymers. Electronic supplementary material The online version of this article (10.1007/s11095-020-02890-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kimberly B Shepard
- Research & Development, Lonza Pharma, Biotech and Nutrition, Bend, Oregon, USA.
| | - April M Dower
- Product Development, Lonza Pharma, Biotech and Nutrition, Bend, Oregon, USA
| | - Alyssa M Ekdahl
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas, USA
| | - Michael M Morgen
- Research & Development, Lonza Pharma, Biotech and Nutrition, Bend, Oregon, USA
| | - John M Baumann
- Research & Development, Lonza Pharma, Biotech and Nutrition, Bend, Oregon, USA
| | - David T Vodak
- Research & Development, Lonza Pharma, Biotech and Nutrition, Bend, Oregon, USA
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124
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Insoluble Polymers in Solid Dispersions for Improving Bioavailability of Poorly Water-Soluble Drugs. Polymers (Basel) 2020; 12:polym12081679. [PMID: 32731391 PMCID: PMC7466147 DOI: 10.3390/polym12081679] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 01/14/2023] Open
Abstract
In recent decades, solid dispersions have been demonstrated as an effective approach for improving the bioavailability of poorly water-soluble drugs, as have solid dispersion techniques that include the application of nanotechnology. Many studies have reported on the ability to change drug crystallinity and molecular interactions to enhance the dissolution rate of solid dispersions using hydrophilic carriers. However, numerous studies have indicated that insoluble carriers are also promising excipients in solid dispersions. In this report, an overview of solid dispersion strategies involving insoluble carriers has been provided. In addition to the role of solubility and dissolution enhancement, the perspectives of the use of these polymers in controlled release solid dispersions have been classified and discussed. Moreover, the compatibility between methods and carriers and between drug and carrier is mentioned. In general, this report on solid dispersions using insoluble carriers could provide a specific approach and/or a selection of these polymers for further formulation development and clinical applications.
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125
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Liu P, Zhou JY, Chang JH, Liu XG, Xue HF, Wang RX, Li ZS, Li CS, Wang J, Liu CZ. Soluplus-Mediated Diosgenin Amorphous Solid Dispersion with High Solubility and High Stability: Development, Characterization and Oral Bioavailability. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:2959-2975. [PMID: 32801637 PMCID: PMC7396739 DOI: 10.2147/dddt.s253405] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/06/2020] [Indexed: 12/14/2022]
Abstract
Background and Purpose The traditional Chinese medicine, diosgenin (Dio), has attracted increasing attention because it possesses various therapeutic effects, including anti-tumor, anti-infective and anti-allergic properties. However, the commercial application of Dio is limited by its extremely low aqueous solubility and inferior bioavailability in vivo. Soluplus, a novel excipient, has great solubilization and capacity of crystallization inhibition. The purpose of this study was to prepare Soluplus-mediated Dio amorphous solid dispersions (ASDs) to improve its solubility, bioavailability and stability. Methods The crystallization inhibition studies were firstly carried out to select excipients using a solvent shift method. According to solubility and dissolution results, the preparation methods and the ratios of drug to excipient were further optimized. The interaction between Dio and Soluplus was characterized by differential scanning calorimetry (DSC), fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and molecular docking. The pharmacokinetic study was conducted to explore the potential of Dio ASDs for oral administration. Furthermore, the long-term stability of Dio ASDs was also investigated. Results Soluplus was preliminarily selected from various excipients because of its potential to improve solubility and stability. The optimized ASDs significantly improved the aqueous solubility of Dio due to its amorphization and the molecular interactions between Dio and Soluplus, as evidenced by dissolution test in vitro, DSC, FT-IR spectroscopy, SEM, PXRD and molecular docking technique. Furthermore, pharmacokinetic studies in rats revealed that the bioavailability of Dio from ASDs was improved about 5 times. In addition, Dio ASDs were stable when stored at 40°C and 75% humidity for 6 months. Conclusion These results indicated that Dio ASDs, with its high solubility, high bioavailability and high stability, would open a promising way in pharmaceutical applications.
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Affiliation(s)
- Pei Liu
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.,Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Jian-Yu Zhou
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Jin-Hua Chang
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Xi-Gang Liu
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - He-Fei Xue
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Ru-Xing Wang
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Zhong-Si Li
- Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
| | - Chun-Shi Li
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Jian Wang
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Cui-Zhe Liu
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.,Hebei Province Key Laboratory of Research and Development for Chinese Medicine, Chengde Medical University, Chengde, Hebei 067000, People's Republic of China
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126
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In Vitro Dissolution Study of Acetylsalicylic Acid and Clopidogrel Bisulfate Solid Dispersions: Validation of the RP-HPLC Method for Simultaneous Analysis. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10144792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Solid dispersions were prepared via a solvent evaporation method, employing ethanol (96%, v/v) as solvent, with three different polymers as carrier: povidone, copovidone, and poloxamer 407. Previously developed reversed-phase HPLC (RP-HPLC) methods were modified and used for the simultaneous determination of acetylsalicylic acid and clopidogrel bisulfate and after release from solid dispersions. Chromatography was carried out on a C-18 column, with a mobile phase of acetonitrile–methanol–phosphate buffer pH 3.0, UV detection at 240 nm, and a run time of 6 min. The method was validated according to International Conference of Harmonisation guidelines and validation included specificity, accuracy, precision, linearity, robustness, limit of detection (LOD), and limit of quantification (LOQ). The method is specific for determination of acetylsalicylic acid and clopidogrel bisulfate. The linearity was provided in the concentration range 0.0275–0.1375 mg/mL for acetylsalicylic acid and 0.0200–0.1000 mg/mL for clopidogrel bisulfate, with a correlation coefficient (R2 value) of 0.9999 for both active pharmaceutical ingredients (APIs). Accuracy was confirmed by calculated recoveries for acetylsalicylic acid (98.6–101.0%) and clopidogrel bisulfate (100.0–101.6%). The intra-day and the inter-day precision-calculated relative standard deviations are less than 1%, which indicates high precision of the method. The limits of detection and quantification for acetylsalicylic acid were 0.0004 and 0.0012 mg/mL, and for clopidogrel bisulfate 0.0002 mg/mL and 0.0007 mg/mL, respectively. Small variations in chromatographic conditions did not significantly affect qualitative and quantitative system responses, which proved robustness of method. The proposed RP-HPLC method was applied for simultaneous determination of clopidogrel bisulfate and acetylsalicylic acid from solid dispersions.
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127
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Minecka A, Tarnacka M, Jurkiewicz K, Hachuła B, Kamiński K, Paluch M, Kamińska E. Influence of the Internal Structure and Intermolecular Interactions on the Correlation between Structural (α) and Secondary (β-JG) Relaxation below the Glass Transition Temperature in Neat Probucol and Its Binary Mixtures with Modified Saccharides. J Phys Chem B 2020; 124:4821-4834. [PMID: 32396358 DOI: 10.1021/acs.jpcb.0c02384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Broadband dielectric spectroscopy (BDS) has been used to study the molecular dynamics and aging process in neat probucol (PRO) as well as its binary mixtures with selected acetylated saccharides. In particular, we applied the Casalini and Roland approach to determine structural relaxation times in the glassy state of the examined systems (so-called isostructural times, τiso). Next, using the calculated τiso, primitive relaxation times of the coupling model were obtained and compared to the experimental secondary β (Johari-Goldstein (JG) type) relaxation times. Interestingly, it turned out that there is a correlation between the β-JG and the structural (α)-relaxation processes below the glass transition temperature (T < Tg) in each investigated sample. This is a new observation compared to previous studies demonstrating that such a relationship exists only in the supercooled liquid state of neat PRO. Moreover, it was revealed that the stretching parameters obtained from the aging procedure are very close to the ones determined by fitting the dielectric data above the Tg with the use of the Kohlrausch-Williams-Watts function, indicating that the aging process is governed by the α-relaxation. Complementary Fourier transform infrared and X-ray diffraction measurements allowed us to find a possible reason for these findings. It was demonstrated that although there are very weak intermolecular interactions between PRO and modified saccharides, the intra- and intermolecular structure of PRO is practically unaffected by the presence of modified saccharides.
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Affiliation(s)
- A Minecka
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - M Tarnacka
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - K Jurkiewicz
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - B Hachuła
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - K Kamiński
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - M Paluch
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - E Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
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128
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Formulation technologies and advances for oral delivery of novel nitroimidazoles and antimicrobial peptides. J Control Release 2020; 324:728-749. [PMID: 32380201 DOI: 10.1016/j.jconrel.2020.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/01/2020] [Accepted: 05/02/2020] [Indexed: 02/06/2023]
Abstract
Antibiotic resistance has become a global crisis, driving the exploration for novel antibiotics and novel treatment approaches. Among these research efforts two classes of antibiotics, bicyclic nitroimidazoles and antimicrobial peptides, have recently shown promise as novel antimicrobial agents with the possibility to treat multi-drug resistant infections. However, they suffer from the issue of poor oral bioavailability due to disparate factors: low solubility in the case of nitroimidazoles (BCS class II drugs), and low permeability in the case of peptides (BCS class III drugs). Moreover, antimicrobial peptides present another challenge as they are susceptible to chemical and enzymatic degradation, which can present an additional pharmacokinetic hurdle for their oral bioavailability. Formulation technologies offer a potential means for improving the oral bioavailability of poorly permeable and poorly soluble drugs, but there are still drawbacks and limitations associated with this approach. This review discusses in depth the challenges associated with oral delivery of nitroimidazoles and antimicrobial peptides and the formulation technologies that have been used to overcome these problems, including an assessment of the drawbacks and limitations associated with the technologies that have been applied. Furthermore, the potential for supercritical fluid technology to overcome the shortcomings associated with conventional drug formulation methods is reviewed.
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129
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Tran PH, Tran TT. Dosage form designs for the controlled drug release of solid dispersions. Int J Pharm 2020; 581:119274. [DOI: 10.1016/j.ijpharm.2020.119274] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/01/2020] [Accepted: 03/25/2020] [Indexed: 12/20/2022]
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130
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Kovács A, Kazsoki A, Démuth B, Szirányi B, Madarász J, Süvegh K, Zelkó R. Influence of Aqueous Solubility-Enhancing Excipients on the Microstructural Characteristics of Furosemide-Loaded Electrospun Nanofibers. Pharmaceutics 2020; 12:pharmaceutics12040385. [PMID: 32340196 PMCID: PMC7238267 DOI: 10.3390/pharmaceutics12040385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 04/21/2020] [Indexed: 11/19/2022] Open
Abstract
Electrospun nanofibers were prepared from furosemide-containing hydroxypropyl cellulose and poly(vinylpyrrolidone) aqueous solutions using different solubility enhancers. In one case, a solubilizer, triethanolamine, was applied, while in the other case a pH-modifier, sodium hydroxide, was applied. Scanning electron microscopy (SEM) was carried out for morphological characterization of the fibers. The SEM images indicated similar mean diameter size of the two fibrous formulations. However, in contrast to the NaOH-containing fibers of normal diameter distribution, the triethanolamine-containing fibers showed approximately normal diameter distribution, possibly due to their plasticizing effect and the consequent slightly ribbon-like morphology. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), powder X-ray diffraction (XRD) and positron annihilation lifetime spectroscopy (PALS) were applied for microstructural characterization. The FTIR measurements confirmed that furosemide salt was formed in both cases. There was no sign of any crystallinity based on the XRD measurements. However, the PALS highlighted the differences in the average o-Ps lifetime values and distributions of the furosemide-loaded fibrous formulations. The two types of electrospun nanofibrous formulations containing amorphous furosemide salt showed similar macrostructures but different microstructural characteristics depending on the type of solubility enhancers, which lead to altered storage stability.
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Affiliation(s)
- Andrea Kovács
- Gedeon Richter Plc., Formulation R&D, Gyömrői Street 19-21, H-1103 Budapest, Hungary; (A.K.); (B.D.); (B.S.)
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Street 7-9, H-1092 Budapest, Hungary;
| | - Adrienn Kazsoki
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Street 7-9, H-1092 Budapest, Hungary;
| | - Balázs Démuth
- Gedeon Richter Plc., Formulation R&D, Gyömrői Street 19-21, H-1103 Budapest, Hungary; (A.K.); (B.D.); (B.S.)
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8. 3, H-1103 Budapest, Hungary
| | - Bernadett Szirányi
- Gedeon Richter Plc., Formulation R&D, Gyömrői Street 19-21, H-1103 Budapest, Hungary; (A.K.); (B.D.); (B.S.)
| | - János Madarász
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary;
| | - Károly Süvegh
- Laboratory of Nuclear Chemistry, Eötvös Loránd University/HAS Chemical Research Center, P.O. Box 32, H-1518 Budapest, Hungary;
| | - Romána Zelkó
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Street 7-9, H-1092 Budapest, Hungary;
- Correspondence: ; Tel.: +36-1-217-0927
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131
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Preparation of solid dispersions with respect to the dissolution rate of active substance. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101518] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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132
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Zhang Q, Ren W, Dushkin AV, Su W. Preparation, characterization, in vitro and in vivo studies of olmesartan medoxomil in a ternary solid dispersion with N-methyl-D-glucamine and hydroxypropyl-β-cyclodextrin. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101546] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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133
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Govender R, Abrahmsén-Alami S, Larsson A, Folestad S. Therapy for the individual: Towards patient integration into the manufacturing and provision of pharmaceuticals. Eur J Pharm Biopharm 2020; 149:58-76. [DOI: 10.1016/j.ejpb.2020.01.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 12/23/2019] [Accepted: 01/08/2020] [Indexed: 12/18/2022]
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134
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Wang W, Li M, Yang Q, Liu Q, Ye M, Yang G. The Opposed Effects of Polyvinylpyrrolidone K30 on Dissolution and Precipitation for Indomethacin Supersaturating Drug Delivery Systems. AAPS PharmSciTech 2020; 21:107. [PMID: 32185564 DOI: 10.1208/s12249-020-01647-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/22/2020] [Indexed: 12/16/2022] Open
Abstract
Amorphous solid dispersions (ASD) are one of the most important supersaturating drug delivery systems (SDDS) for poorly water-soluble drugs to improve their bioavailability. As a result of thermodynamic instability, drug molecules tend to precipitate during storage and dissolution in gastrointestinal tract. Various precipitation inhibitors (PI) have been widely used to improve the stability in the past decade. However, most studies have investigated the inhibiting capability of PI on drug precipitation, rarely considering their potential hindering effect on the drug dissolution. The present study designed an ASD of Indomethacin (IND) and Eudragit® EPO by hot melt extrusion to investigate the influence of the added PI (PVP-K30) into ASD both on dissolution and precipitation. The precipitation study by solvent shift method indicated PVP-K30 could inhibit the precipitation of IND significantly. The dissolution study in different concentrations of PVP-K30 showed when the concentration increased above 50 μg/mL, PVP-K30 displayed an acceptable precipitation inhibition without drug concentration decline but an unexpected dissolution impediment with the reduction of maximum concentration platform. The dissolution tests of physical mixtures (PMs) of ASD and PVP-K30 also showed the precipitation inhibition and dissolution impediment when more than 2% PVP-K30 in PMs. This opposed effect of PVP-K30 was strengthen in ternary systems prepared by hot melt extruding the mixtures of IND, Eudragit® EPO and PVP-K30. All of these results proved the PI may be a double-edged sword for the opposed effects of precipitation inhibition and dissolution impediment, which should be carefully considered in the design and development of SDDS.
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135
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Kamińska E, Minecka A, Tarnacka M, Hachuła B, Kamiński K, Paluch M. Influence of Annealing in the Close Vicinity of Tg on the Reorganization within Dimers and Its Impact on the Crystallization Kinetics of Gemfibrozil. Mol Pharm 2020; 17:990-1000. [PMID: 31961694 PMCID: PMC7588139 DOI: 10.1021/acs.molpharmaceut.9b01244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, broadband dielectric spectroscopy (BDS) has been applied to study the molecular dynamics and crystallization kinetics of the antihyperlipidemic active pharmaceutical ingredient (API), gemfibrozil (GEM), as well as its deuterated (dGEM) and methylated (metGEM) derivatives, characterized by different types and strengths of intermolecular interactions. Moreover, calorimetric and infrared measurements have been carried out to characterize the thermal properties of examined samples and to probe a change in the H-bonding pattern in GEM, respectively. We found that the dielectric spectra of all examined compounds, collected below the glass transition temperature (Tg), reveal the presence of two secondary relaxations (β, γ). According to the coupling model (CM) predictions, it was assumed that the slower process (β) is of JG type, whereas the faster one (γ) has an intramolecular origin. Interestingly, the extensive crystallization kinetics measurements performed after applying two paths, i.e., the standard procedure (cooling and subsequently heating up to the appropriate temperature, Tc), as well as annealing at two temperatures in the vicinity of Tg and further heating up to Tc, showed that the annealing increases the crystallization rate in the case of native API, while the thermal history of the sample has no significant impact on the pace of this process in the two derivatives of GEM. Analysis of the dielectric strength (Δε) of the α-process during annealing, together with the results of Fourier transform infrared spectroscopy (FTIR) measurements, suggested that the reorganization within dimeric structures formed between the GEM molecules is responsible for the observed behavior. Importantly, our results differ from those obtained by Tominaka et al. (Tominaka, S.; Kawakami, K.; Fukushima, M.; Miyazaki, A.Physical Stabilization of Pharmaceutical Glasses Based on Hydrogen Bond Reorganization under Sub-Tg Temperature Mol. Pharm. 2017 14 264 273 10.1021/acs.molpharmaceut.6b00866.), who demonstrated that the sub-Tg annealing of ritonavir (RTV), which is able to form extensive supramolecular hydrogen bonds, protects this active substance against crystallization. Therefore, based on these contradictory reports, one can hypothesize that materials forming H-bonded structures, characterized by varying architecture, may behave differently after annealing in the vicinity of the glass transition temperature.
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Affiliation(s)
- Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Aldona Minecka
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Magdalena Tarnacka
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Barbara Hachuła
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
| | - Kamil Kamiński
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.,Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
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136
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Katopodis K, Kapourani A, Vardaka E, Karagianni A, Chorianopoulou C, Kontogiannopoulos KN, Bikiaris DN, Kachrimanis K, Barmpalexis P. Partially hydrolyzed polyvinyl alcohol for fusion-based pharmaceutical formulation processes: Evaluation of suitable plasticizers. Int J Pharm 2020; 578:119121. [DOI: 10.1016/j.ijpharm.2020.119121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 02/02/2020] [Accepted: 02/04/2020] [Indexed: 01/12/2023]
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137
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Dohrn S, Luebbert C, Lehmkemper K, Kyeremateng SO, Degenhardt M, Sadowski G. Phase behavior of pharmaceutically relevant polymer/solvent mixtures. Int J Pharm 2020; 577:119065. [DOI: 10.1016/j.ijpharm.2020.119065] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/16/2020] [Accepted: 01/17/2020] [Indexed: 01/30/2023]
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138
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Hempel NJ, Knopp MM, Berthelsen R, Zeitler JA, Löbmann K. The influence of drug and polymer particle size on the in situ amorphization using microwave irradiation. Eur J Pharm Biopharm 2020; 149:77-84. [PMID: 32035238 DOI: 10.1016/j.ejpb.2020.01.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/16/2020] [Accepted: 01/31/2020] [Indexed: 10/25/2022]
Abstract
In this study, the impact of drug and polymer particle size on the in situ amorphization using microwave irradiation at a frequency of 2.45 GHz were investigated. Using ball milling and sieve fractioning, the crystalline drug celecoxib (CCX) and the polymer polyvinylpyrrolidone (PVP) were divided into two particle size fractions, i.e. small (<71 µm) and large (>71 µm) particles. Subsequently, compacts containing a drug load of 30% (w/w) crystalline CCX in PVP were prepared and subjected to microwave radiation for an accumulated duration of 600 sec in intervals of 60 sec as well as continuously for 600 sec. It was found that the compacts containing small CCX particles displayed faster rates of amorphization and a higher degree of amorphization during microwave irradiation as compared to the compacts containing large CCX particles. For compacts with small CCX particles, interval exposure to microwave radiation resulted in a maximum degree of amorphization of 24%, whilst a fully amorphous solid dispersion (100%) was achieved after 600 sec of continuous exposure to microwave radiation. By monitoring the temperature in the core of the compacts during exposure to microwave radiation using a fiber optic temperature probe, it was found that the total exposure time above the glass transition temperature (Tg) was shorter for the interval exposure method compared to continuous exposure to microwave radiation. Therefore, it is proposed that the in situ formation of an amorphous solid dispersion is governed by the dissolution of drug into the polymer, which most likely is accelerated above the Tg of the compacts. Hence, prolonging the exposure time above the Tg, and increasing the surface area of the drug by particle size reduction will increase the dissolution rate and thus, rate and degree of amorphization of CCX during exposure to microwave radiation.
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Affiliation(s)
| | | | - Ragna Berthelsen
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - J Axel Zeitler
- Department of Chemical Engineering, University of Cambridge, Cambridge CB2 3RA, UK
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark.
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139
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Shepard KB, Adam MS, Morgen MM, Mudie DM, Regan DT, Baumann JM, Vodak DT. Impact of process parameters on particle morphology and filament formation in spray dried Eudragit L100 polymer. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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140
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Impact of Hot-Melt Extrusion Processing Conditions on Physicochemical Properties of Amorphous Solid Dispersions Containing Thermally Labile Acrylic Copolymer. J Pharm Sci 2020; 109:1008-1019. [DOI: 10.1016/j.xphs.2019.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/20/2019] [Accepted: 10/01/2019] [Indexed: 12/22/2022]
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141
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Moinuddin SM, Shi Q, Tao J, Guo M, Zhang J, Xue Q, Ruan S, Cai T. Enhanced Physical Stability and Synchronized Release of Febuxostat and Indomethacin in Coamorphous Solids. AAPS PharmSciTech 2020; 21:41. [PMID: 31898765 DOI: 10.1208/s12249-019-1578-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/12/2019] [Indexed: 11/30/2022] Open
Abstract
Coamorphous formulation, a homogeneous monophasic amorphous system composed of multiple components, has been demonstrated as an effective approach for delivering drugs with poor aqueous solubility. In this study, we prepared the coamorphous system composed of two poorly soluble drugs febuxostat (FEB) and indomethacin (IMC) by using cryogenic milling. The combination of these two drugs in the coamorphous form can attain a synergistic effect, especially on gout therapy. Coamorphous solid of FEB and IMC in 1:1 molar ratio exhibited superior physical stability compared with the individual amorphous components, as evidenced by X-ray powder diffractions after 30 days of storage at ambient and elevated temperature. In addition, the FEB-IMC coamorphous system has been demonstrated to show enhanced dissolution performance. The intrinsic dissolution rates of two components in the coamorphous system exhibited the synchronized drug release. Based on the FT-IR spectroscopy, the excellent physical stability and synchronized release of FEB-IMC coamorphous system could be attributed to the heterodimer structure formed by strong hydrogen bonding interactions between these drugs. Furthermore, the supersaturation potential of FEB-IMC coamorphous solids was also investigated through the cosolvent quenching method. The FEB-IMC coamorphous system can effectively inhibit the fast crystallization of FEB in the supersaturated solution. However, the maximum achievable supersaturation of IMC in the coamorphous system decreases to only one fifth of that achieved for the pure amorphous IMC. These results are relevant for understanding the physical stability and complex solution behaviors of the coamorphous formulation.
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142
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Su M, Xia Y, Shen Y, Heng W, Wei Y, Zhang L, Gao Y, Zhang J, Qian S. A novel drug–drug coamorphous system without molecular interactions: improve the physicochemical properties of tadalafil and repaglinide. RSC Adv 2020; 10:565-583. [PMID: 35492562 PMCID: PMC9048229 DOI: 10.1039/c9ra07149k] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/17/2019] [Indexed: 01/24/2023] Open
Abstract
Tadalafil and repaglinide, categorized as BCS class II drugs, have low oral bioavailabilities due to their poorly aqueous solubilities and dissolutions. The aim of this study was to enhance the dissolution of tadalafil and repaglinide by co-amorphization technology and evaluate the storage and compression stability of such coamorphous system. Based on Flory–Huggins interaction parameter (χ ≤ 0) and Hansen solubility parameter (δt ≤ 7 MPa0.5) calculations, tadalafil and repaglinide was predicted to be well miscible with each other. Coamorphous tadalafil–repaglinide (molar ratio, 1 : 1) was prepared by solvent-evaporation method and characterized with respect to its thermal properties, possible molecular interactions. A single Tg (73.1 °C) observed in DSC and disappearance of crystallinity in PXRD indicated the formation of coamorphous system. Principal component analysis of FTIR in combination with Raman spectroscopy and Ss 13C NMR suggested the absence of intermolecular interactions in coamorphous tadalafil–repaglinide. In comparison to pure crystalline forms and their physical mixtures, both drugs in coamorphous system exhibited significant increases in intrinsic dissolution rate (1.5–3-fold) and could maintain supersaturated level for at least 4 hours in non-sink dissolution. In addition, the coamorphous tadalafil–repaglinide showed improved stability compared to the pure amorphous forms under long-term stability and accelerated storage conditions as well as under high compressing pressure. In conclusion, this study showed that co-amorphization technique is a promising approach for improving the dissolution rate of poorly water-soluble drugs and for stabilizing amorphous drugs. The coamorphous tadalafil–repaglinide (molar ratio, 1 : 1) prepared by solvent-evaporation method significantly improve the physicochemical properties of tadalafil and repaglinide.![]()
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Affiliation(s)
- Meiling Su
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yanming Xia
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yajing Shen
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Weili Heng
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yuanfeng Wei
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Linghe Zhang
- Department of Chemistry
- Smith College
- Northampton
- USA
| | - Yuan Gao
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Jianjun Zhang
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Shuai Qian
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
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143
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The Polymorphism of Drugs: New Approaches to the Synthesis of Nanostructured Polymorphs. Pharmaceutics 2020; 12:pharmaceutics12010034. [PMID: 31906357 PMCID: PMC7022426 DOI: 10.3390/pharmaceutics12010034] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/12/2019] [Accepted: 12/25/2019] [Indexed: 11/24/2022] Open
Abstract
Among the significant problems of modern pharmacology are the low solubility and bioavailability of drugs. One way to resolve this problem is to obtain new polymorphic forms of drugs with improved physicochemical properties. Various approaches have been developed with this aim, including the preparation of co-crystals, the use of nanoparticles, or the use of compounds in the form of a salt. A promising direction in pharmacology concerns the production of new stable polymorphic structures. In this mini-review, we consider certain aspects of drug polymorphism, methods for the synthesis of polymorphs, and the stability, size, and transformation of crystalline polymorphs. Moreover, we summarize our results from several studies demonstrating the problems associated with the synthesis of new polymorphous modifications based on inert gases and cryotemperatures. The results indicate that the problems specific to drug polymorphisms have only been partly resolved, are of current interest, and require further development.
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144
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High Content Solid Dispersions for Dose Window Extension: A Basis for Design Flexibility in Fused Deposition Modelling. Pharm Res 2019; 37:9. [PMID: 31848730 PMCID: PMC6917630 DOI: 10.1007/s11095-019-2720-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/12/2019] [Indexed: 01/01/2023]
Abstract
PURPOSE This study uses high drug content solid dispersions for dose window extension beyond current demonstrations using fused deposition modelling (FDM) to; i) accommodate pharmaceutically relevant doses of drugs of varying potencies at acceptable dosage form sizes and ii) enable enhanced dose flexibility via modular dosage form design concepts. METHODS FDM was used to generate ~0.5 mm thick discs of varying diameter (2-10 mm) from melt-extruded feedstocks based on 10% to 50% w/w felodipine in ethyl cellulose. Drug content was determined by UV spectroscopy and dispensing precision from printed disc mass. RESULTS Mean felodipine content was within ±5% of target values for all print volumes and compositions including contents as high as ~50% w/w. However, poor dispensing precision was evident at all print volumes. CONCLUSIONS In pursuit of dose flexibility, this successful demonstration of dose window extension using high content solid dispersions preserves FDM design flexibility by maintaining applicability to drugs of varying potencies. The achieved uniformity of content supports the application of varying content solid dispersions to modular dosage form concepts to enhance dose flexibility. However, poor dispensing precision impedes its utilisation until appropriate compatibility between FDM hardware and materials at varying drug contents can be attained.
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145
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Mendonsa N, Almutairy B, Kallakunta VR, Sarabu S, Thipsay P, Bandari S, Repka MA. Manufacturing strategies to develop amorphous solid dispersions: An overview. J Drug Deliv Sci Technol 2019; 55. [PMID: 32863891 DOI: 10.1016/j.jddst.2019.101459] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Since the past several decades, poor water solubility of existing and new drugs in the pipeline have remained a challenging issue for the pharmaceutical industry. Literature describes several approaches to improve the overall solubility, dissolution rate, and bioavailability of drugs with poor water solubility. Moreover, the development of amorphous solid dispersion (SD) using suitable polymers and methods have gained considerable importance in the recent past. In the present review, we attempt to discuss the important and industrially scalable thermal strategies for the development of amorphous SD. These include both solvent (spray drying and fluid bed processing) and fusion (hot melt extrusion and KinetiSol®) based techniques. The current review also provides insights into the thermodynamic properties of drugs, their polymer miscibility and solubility, and their molecular dynamics to develop stable and more efficient amorphous SD.
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Affiliation(s)
- Nicole Mendonsa
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Bjad Almutairy
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Venkata Raman Kallakunta
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Sandeep Sarabu
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Priyanka Thipsay
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Suresh Bandari
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States
| | - Michael A Repka
- Department of Pharmaceutics and Drug Delivery, The University of Mississippi, Oxford, MS, 38677, United States.,Pii Center for Pharmaceutical Innovation & Instruction, The University of Mississippi, Oxford, MS, 38677, United States
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146
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Micron-size lactose manufactured under high shear and its dispersion efficiency as carrier for Salbutamol Sulphate. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.08.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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147
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Quan P, Wan X, Tian Q, Liu C, Fang L. Dicarboxylic acid as a linker to improve the content of amorphous drug in drug-in-polymer film: Effects of molecular mobility, electrical conductivity and intermolecular interactions. J Control Release 2019; 317:142-153. [PMID: 31785302 DOI: 10.1016/j.jconrel.2019.11.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/23/2019] [Accepted: 11/26/2019] [Indexed: 01/03/2023]
Abstract
Amorphous solid dispersion (ASD) is a well-established approach to improve the dissolution rate of the drugs with low water solubility. However, the application of the ASD was hindered by the low drug content and high risk of re-crystallization of drugs. The purpose of this research was to develop an ASD film with high content of amorphous olanzapine (OLN) for oral delivery. To overcome the high crystallization tendency of OLN in polyvinyl alcohol (PVA) films, three dicarboxylic acids (succinic acid (Suc), fumaric acid (Fum) and malic acid (Mal)) were introduced in the drug-in-polymer system as linkers between the drug and the polymer. The influence of the linkers on the re-crystallization of OLN in PVA films was evaluated by polarized light microscopy (PLM) and x-ray diffraction (XRD). Then, the possible mechanisms of crystallization inhibition were discussed based on the results of dielectric spectroscopy (DES), differential scanning calorimetry (DSC), attenuated total reflectance Fourier transform infrared (ATR-FTIR), Raman spectroscopy and molecular modeling. Finally, the effect of the linkers on the in vitro dissolution of the OLN-in-PVA films was studied in simulant saliva, and the in vivo performance of the optimal formulation was evaluated in rats. The results showed that OLN-in-PVA film have lower molecular mobility, lower electrical conductivity and stronger intermolecular interactions with the existence of Mal, which led to a better crystallization inhibition of OLN in PVA films. The re-crystallization of OLN in PVA films decreased the dissolution rate of OLN in simulant saliva. The in vivo performance of the optimal formulation was similar with that of OLN solution in rats. This study introduced a novel strategy to reduce the risk of drug re-crystallization in ASD, and also provided a deeper insight into the mechanisms of crystallization inhibition in ASD. The results will improve the judicious selection of excipients in pharmaceutical formulations.
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Affiliation(s)
- Peng Quan
- Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Xiaocao Wan
- Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Qi Tian
- Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Chao Liu
- Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Liang Fang
- Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning 110016, China.
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148
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Boel E, Smeets A, Vergaelen M, De la Rosa VR, Hoogenboom R, Van den Mooter G. Comparative study of the potential of poly(2-ethyl-2-oxazoline) as carrier in the formulation of amorphous solid dispersions of poorly soluble drugs. Eur J Pharm Biopharm 2019; 144:79-90. [DOI: 10.1016/j.ejpb.2019.09.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/08/2019] [Accepted: 09/06/2019] [Indexed: 01/26/2023]
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149
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Lu W, Rades T, Rantanen J, Chan HK, Yang M. Amino acids as stabilizers for spray-dried simvastatin powder for inhalation. Int J Pharm 2019; 572:118724. [PMID: 31678523 DOI: 10.1016/j.ijpharm.2019.118724] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/15/2019] [Accepted: 09/20/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND The use of amino acids as excipients is a promising approach to improve the physical stability and powder dispersibility of spray-dried powders for inhalation. OBJECTIVES The aim of this study was to investigate the stabilizing effect of different amino acids on spray-dried amorphous powders for inhalation using simvastatin (SV) as a model compound. METHODS Two hydrophobic amino acids (leucine, LEU and tryptophan, TRP), and one hydrophilic amino acid (lysine, LYS) were spray dried from 1% (w/v) solutions with SV at a molar ratio of 1:1 into dry powders for inhalation. Scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) were used to characterize the morphology, solid form and potential intermolecular interactions of the spray-dried powders. X-ray photoelectron spectroscopy (XPS) was used to analyse the chemical composition of the surface of the particles. The physical stability of the dry powders was examined upon storage in controlled conditions. A Next generation impactor (NGI) was applied to assess the in vitro aerosol performance of the powders. RESULTS XRPD and DSC results confirmed that the spray-dried SV-LEU was composed of crystalline LEU and amorphous SV, the spray-dried SV-LYS was co-amorphous, and the spray-dried SV-TRP was an amorphous system with two phases. XPS analyses revealed that the surface of the spray-dried SV-LEU particles were LEU rich, indicating surface-enrichment of LEU in these particles. In contrast, an almost even distribution of TRP and SV at the surface of spray-dried SV-TRP was observed. FTIR results indicated no intermolecular interaction between SV and the amino acids used in the present study. The three spray-dried samples were physically stable after eight months storage in a desiccator (12% RH, ca. 22 °C). Nevertheless, spray-dried SV-LEU exhibited the best storage stability as compared to the other two spray-dried samples when the samples were stored at 60% RH, 25 °C. Both, the spray-dried SV-LEU and SV-TRP exhibited higher fine particle fractions than the spray-dried SV-LYS. CONCLUSION Both the spray-dried SV-LEU and SV-TRP exhibited better aerosol performance and storage stability compared to the spray-dried SV-LYS. Compared to TRP, LEU exhibited better protection of spray-dried amorphous SV from re-crystallization, which could be attributed to the formation of a LEU crystalline shell covering SV upon the spray drying process.
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Affiliation(s)
- Wangding Lu
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Jukka Rantanen
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Hak-Kim Chan
- Sydney Pharmacy School, Faculty of Medicine and Health, University of Sydney, Science Road A15, NSW 2006 Sydney, Australia
| | - Mingshi Yang
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark; Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, China.
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150
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Pinto JMO, Leão AF, Alves GF, Mendes C, França MT, Fernandes D, Stulzer HK. New supersaturating drug delivery system as strategy to improve apparent solubility of candesartan cilexetil in biorelevant medium. Pharm Dev Technol 2019; 25:89-99. [DOI: 10.1080/10837450.2019.1675171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Aline Franciane Leão
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Gustavo Ferreira Alves
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Cassiana Mendes
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Maria Terezinha França
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Daniel Fernandes
- Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Hellen Karine Stulzer
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
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