1
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Alsenz J, Haenel E. Precellys® Evolution Homogenizer - a versatile instrument for milling, mixing, and amorphization of drugs in preformulation. Eur J Pharm Biopharm 2023; 189:1-14. [PMID: 37245695 DOI: 10.1016/j.ejpb.2023.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/14/2023] [Accepted: 05/02/2023] [Indexed: 05/30/2023]
Abstract
The aim of this work was the evaluation and introduction of the Bertin Precellys® Evolution homogenizer with Cryolys® as a valuable and versatile tool for the improvement of workflows in the preformulation phase of drug development. The presented pilot experiments indicate that the instrument can be applied for (1) screening of appropriate vehicles for the generation of micro- and nano suspensions, (2) small-scale manufacturing of suspension formulations for preclinical animal studies, (3) drug amorphization and identification of appropriate excipients for amorphous systems, and (4) preparation of homogenous powder blends. The instrument allows the rapid, parallel, and compound-sparing screening of formulation approaches and small-scale formulation manufacturing, in particular for low solubility compounds. For the characterization of generated formulations, miniaturized methods are introduced such as a screening tool for suspension sedimentation and redispersion and a non-sink dissolution model in biorelevant media in microtiter plates. This work summarizes exploratory, proof-of-concept studies and opens up new opportunities for more extended studies with this instrument in various application areas.
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Affiliation(s)
- Jochem Alsenz
- Roche Pharmaceutical Research & Early Development, Pre-Clinical CMC, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland.
| | - Elisabeth Haenel
- Roche Pharmaceutical Research & Early Development, Pre-Clinical CMC, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland.
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2
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Du Y, Struppe J, Perrone B, Hassan A, Codina A, Su Y. Efficient analysis of pharmaceutical drug substances and products using a solid-state NMR CryoProbe. Analyst 2023; 148:724-734. [PMID: 36722866 DOI: 10.1039/d2an01903e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Solid-state nuclear magnetic resonance (ssNMR) is a high-resolution and versatile spectroscopic tool for characterizing pharmaceutical solids. However, the inherent low sensitivity of NMR remains a significant challenge in the analysis of natural abundance drug substances and products. Here, we report, for the first time, the application of a CPMAS CryoProbe™ to improve the sensitivity of 13C and 15N detection by approximately 5 to 6 times for solid-state analysis of a commercial pharmaceutical drug posaconazole (POSA). The sensitivity enhancement enables two-dimensional (2D) 13C-13C and 1H-15N correlation experiments, which are otherwise time-prohibitive using regular MAS probes, for resonance assignment and structural elucidation. These polarization transfer and correlation experiments reveal drug-drug and drug-polymer interactions in amorphous POSA and its amorphous solid dispersion formulation. Our results demonstrated that the CPMAS CryoProbe™ can be widely applied for routine pharmaceutical analysis and advanced structural investigations with significantly enhanced efficiency and throughput.
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Affiliation(s)
- Yong Du
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ 07065, USA.
| | | | | | - Alia Hassan
- Bruker Switzerland AG, 8117 Faellanden, Switzerland
| | | | - Yongchao Su
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ 07065, USA.
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3
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Supersaturation and phase behavior during dissolution of amorphous solid dispersions. Int J Pharm 2023; 631:122524. [PMID: 36549404 DOI: 10.1016/j.ijpharm.2022.122524] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/04/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022]
Abstract
Amorphous solid dispersion (ASD) is a promising strategy to enhance solubility and bioavailability of poorly water-soluble drugs. Due to higher free energy of ASD, supersaturated drug solution could be generated during dissolution. When amorphous solubility of a drug is exceeded, drug-rich nanodroplets could form and act as a reservoir to maintain the maximum free drug concentration in solution, facilitating the absorption of the drug in vivo. Dissolution behavior of ASD has received increasing interests. This review will focus on the recent advances in ASD dissolution, including the generation and maintenance of supersaturated drug solution in absence or presence of liquid-liquid phase separation. Mechanism of drug release from ASD including polymer-controlled dissolution and drug-controlled dissolution will be introduced. Formation of amorphous drug-rich nanodroplets during dissolution and the underlying mechanism will be discussed. Phase separation morphology of hydrated ASD plays a critical role in dissolution behavior of ASD, which will be highlighted. Supersaturated drug solution shows poor physical stability and tends to crystallize. The effect of polymer and surfactant on supersaturated drug solution will be demonstrated and some unexpected results will be shown. Physicochemical properties of drug and polymer could impact ASD dissolution and some of them even show opposite effect on dissolution and physical stability of ASD in solid state, respectively. This review will contribute to a better understanding of ASD dissolution and facilitate a rational design of ASD formulation.
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4
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Seo Y, Zuo B, Cangialosi D, Priestley RD. Physical aging of hydroxypropyl methylcellulose acetate succinate via enthalpy recovery. SOFT MATTER 2022; 18:8331-8341. [PMID: 36300535 DOI: 10.1039/d2sm01189a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Amorphous solid dispersions (ASDs) utilize the kinetic stability of the amorphous state to stabilize drug molecules within a glassy polymer matrix. Therefore, understanding the glassy-state stability of the polymer excipient is critical to ASD design and performance. Here, we investigated the physical aging of hydroxypropyl methylcellulose acetate succinate (HPMCAS), a commonly used polymer in ASD formulations. We found that HPMCAS exhibited conventional physical aging behavior when annealed near the glass transition temperature (Tg). In this scenario, structural recovery was facilitated by α-relaxation dynamics. However, when annealed well below Tg, a sub-α-relaxation process facilitated low-temperature physical aging in HPMCAS. Nevertheless, the physical aging rate exhibited no significant change up to 40 K below Tg, below which it exhibited a near monotonic decrease with decreasing temperature. Finally, infrared spectroscopy was employed to assess any effect of physical aging on the chemical structure of HPMCAS, which is known to be susceptible to degradation at temperatures 30 K above its Tg. Our results provide critical insights necessary to understand better the link between the stability of ASDs and physical aging of the glassy polymer matrix.
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Affiliation(s)
- Yejoon Seo
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08540, USA
| | - Biao Zuo
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Daniele Cangialosi
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018, San Sebastián, Spain
- Centro de Fisica de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizábal 5, 20018, San Sebastián, Spain
| | - Rodney D Priestley
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08540, USA
- Princeton Institute for the Science and Technology of Materials, Princeton University, 41 Olden St, A215 Chemical and Biological Engineering, Princeton, New Jersey 08540, USA.
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5
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Budiman A, Nurfadilah N, Muchtaridi M, Sriwidodo S, Aulifa DL, Rusdin A. The Impact of Water-Soluble Chitosan on the Inhibition of Crystal Nucleation of Alpha-Mangostin from Supersaturated Solutions. Polymers (Basel) 2022; 14:polym14204370. [PMID: 36297947 PMCID: PMC9610582 DOI: 10.3390/polym14204370] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/12/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
The use of an amorphous drugs system to generate supersaturated solutions is generally developed to improve the solubility and dissolution of poorly soluble drugs. This is because the drug in the supersaturation system has a high energy state with a tendency to precipitate. In the amorphous solid dispersion (ASD) formulation, it was discovered that polymer plays a critical role in inhibiting nucleation or crystal growth of the drugs. Therefore, this study aimed to evaluate the crystallization inhibition of water-soluble chitosan (WSC) on nucleation as well as crystal growth from alpha-mangostin (AM) and elucidate its inhibition mechanism in the supersaturated solutions. During the experiment, WSC was used as a polymer to evaluate its ability to inhibit AM nucleation. The interaction between WSC and AM was also estimated using FT-IR, NMR, and in silico study. The result showed that in the absence of polymer, the concentration of AM rapidly decreased due to the precipitation in one minute. Meanwhile, the addition of WSC effectively inhibited AM crystallization and maintained a supersaturated state for the long term. FT-IR measurement also revealed that the shift in the amine primer of WSC occurred because of the interaction between WSC and AM. In the 1H NMR spectra, the proton peaks of WSC showed an upfield shift with the presence of AM, indicating the intermolecular interactions between AM and WSC. Moreover, in silico study revealed the hydrogen bond interaction between the carbonyl group of AM with hydrocarbon groups of WSC. This indicated that WSC interacted with AM in the supersaturated solution and suppressed their molecular mobility, thereby inhibiting the formation of the crystal nucleus. Based on these results, it can be concluded that the interaction between drug polymers contributed to the maintenance of the drug supersaturation by inhibiting both nucleation and growth.
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Affiliation(s)
- Arif Budiman
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
- Correspondence:
| | - Nisrina Nurfadilah
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
| | - Muchtaridi Muchtaridi
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
| | - Sriwidodo Sriwidodo
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
| | - Diah Lia Aulifa
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
| | - Agus Rusdin
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km. 21, Bandung 45363, Indonesia
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6
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Discovery solubility measurement and assessment of small molecules with drug development in mind. Drug Discov Today 2022; 27:1315-1325. [PMID: 35114363 DOI: 10.1016/j.drudis.2022.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 01/04/2022] [Accepted: 01/27/2022] [Indexed: 12/24/2022]
Abstract
Solubility is a key physicochemical property for the success of any drug candidate. Although the methods used and their rationales for determining solubility are subject to project needs and stages along the drug discovery-drug development pipeline, an artificial boundary can exist at the discovery-development interface. This boundary results in less effective solubility knowledge sharing and data integration among scientists in both drug discovery and drug development. Herein, we present a refreshed perspective on solubility. Solubility experimentation is not a one-size-fits-all measurement; instead, we stress the importance of constructing a seamless solubility understanding of a molecule as it progresses from a new chemical entity into a drug product.
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7
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Chen T, Ma Z, Qiu Z, Zhong Z, Xing L, Guo Q, Luo D, Weng Z, Ge F, Huang Y, Zhang X, He H, Zhuang X, Li Q, Yuan T. Characterization of excipients to improve pharmaceutical properties of sirolimus in the supercritical anti-solvent fluidized process. Int J Pharm 2021; 611:121240. [PMID: 34780928 DOI: 10.1016/j.ijpharm.2021.121240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 10/15/2021] [Accepted: 10/25/2021] [Indexed: 11/26/2022]
Abstract
Enhanced drug release and bioavailability of poorly soluble active pharmaceutical ingredient (API) can be achieved via a fluidized bed coating integrated with supercritical anti-solvent (SAS-FB) - a process of precipitating drug particles onto carrier granules. However, in the absence of excipients, SAS-FB often results in crystalline of the API on the surface of carriers, limiting the improvement of pharmaceutical properties. Co-processing with excipients is considered an effective approach to improve drug release in the SAS-FB process. Our study used sirolimus, an immune suppressive agent, as the model API to characterize excipients for their effect on pharmaceutical properties in the SAS-FB process. We show that co-precipitation of excipients and sirolumus impacts on carrier specific surface area and drug yield. Among the tested excipients, formulation containing polyvinylpyrrolidone K30 achieved the highest drug yield. Importantly, compared with Rapamune® tablet, our optimized formulation displayed a superior in vivo oral bioavailability by 3.05-fold in Sprague-Dawley rats and 3.99-fold in beagle dogs. A series of characterization of the processed API was performed to understand the mechanism by which excipients contributed to drug dissolution properties. Our study provides a useful guidance for the use of excipients in the SAS-FB technology to improve pharmaceutical properties of sirolimus and other poorly soluble drugs.
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Affiliation(s)
- Tingting Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Zhimin Ma
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Zhenwen Qiu
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Zhong Zhong
- Department of Pharmacy and Medical Equipment, Foshan Chancheng People's Hospital, Foshan 528000, PR China
| | - Lei Xing
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Qiuping Guo
- Drug Non-Clinical Evaluation and Research Center of Guangzhou General Pharmaceutical Research Institute, Guangzhou 510240, PR China
| | - Dandong Luo
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Zhiwei Weng
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Fucheng Ge
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Yating Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Xiubing Zhang
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Hongling He
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Xiaodong Zhuang
- Nuffield Department of Clinical Medicine, University of Oxford, OX3 7FZ, UK.
| | - Qingguo Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China.
| | - Tianhui Yuan
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China.
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8
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Vertzoni M, Alsenz J, Augustijns P, Bauer-Brandl A, Bergström C, Brouwers J, Müllerz A, Perlovich G, Saal C, Sugano K, Reppas C. UNGAP best practice for improving solubility data quality of orally administered drugs. Eur J Pharm Sci 2021; 168:106043. [PMID: 34662708 DOI: 10.1016/j.ejps.2021.106043] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 11/03/2022]
Abstract
An important goal of the European Cooperation in Science and Technology (COST) Action UNGAP (UNderstanding Gastrointestinal Absorption-related Processes, www.ungap.eu) is to improve standardization of methods relating to the study of oral drug absorption. Solubility is a general term that refers to the maximum achievable concentration of a compound dissolved in a liquid medium. For orally administered drugs, relevant information on drug properties is crucial during drug (product) development and at the regulatory level. Collection of reliable and reproducible solubility data requires careful application and understanding of the limitations of the selected experimental method. In addition, the purity of a compound and its solid state form, as well as experimental parameters such as temperature of experimentation, media related factors, and sample handling procedures can affect data quality. In this paper, an international consensus developed by the COST UNGAP network on recommendations for collecting high quality solubility data for the development of orally administered drugs is proposed.
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Affiliation(s)
- M Vertzoni
- National and Kapodistrian University of Athens, Department of Pharmacy, Zografou, Greece
| | - J Alsenz
- Roche Pharmaceutical Research & Early Development, Basel, Switzerland
| | - P Augustijns
- KU Leuven, Drug Delivery and Disposition, Leuven, Belgium
| | - A Bauer-Brandl
- University of Southern Denmark, Department of Physics Chemistry and Pharmacy, Odense, Denmark
| | - Cas Bergström
- Uppsala University, Department of Pharmacy, Uppsala, Sweden
| | - J Brouwers
- KU Leuven, Drug Delivery and Disposition, Leuven, Belgium
| | - A Müllerz
- University of Copenhagen, Department of Pharmacy, Copenhagen, Denmark
| | - G Perlovich
- The Russian Academy of Sciences, Institute of Solution Chemistry, Department of Physical Chemistry of Drugs, Ivanovo, Russia
| | - C Saal
- Merck KGaA, Analytics Healthcare, Darmstadt, Germany
| | - K Sugano
- Ritsumeikan University, College of Pharmaceutical Sciences, Kusatsu, Japan
| | - C Reppas
- National and Kapodistrian University of Athens, Department of Pharmacy, Zografou, Greece.
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9
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Wen X, Deng Z, Xu Y, Yan G, Deng X, Wu L, Liang Q, Fang F, Feng X, Yu M, He J. Preparation and In Vitro/In Vivo Evaluation of Orally Disintegrating/Modified-Release Praziquantel Tablets. Pharmaceutics 2021; 13:pharmaceutics13101567. [PMID: 34683860 PMCID: PMC8538324 DOI: 10.3390/pharmaceutics13101567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/09/2021] [Accepted: 09/22/2021] [Indexed: 12/11/2022] Open
Abstract
This study was designed to develop orally disintegrating/sustained-release praziquantel (PZQ) tablets using the hot-melt extrusion (HME) technique and direct compression, and subsequently evaluate their release in in vitro and in vivo pharmacokinetics. For the extrusion process, hypromellose acetate succinate (HPMCAS)-LG was the carrier of pure PZQ, with a standard screw configuration used at an extrusion temperature of 140 °C and a screw rotation speed of 100 rpm. Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD) and Fourier-transform infrared spectroscopy (FTIR) were performed to characterize the extrudate. Orally disintegrating/sustained-release praziquantel tablets (PZQ ODSRTs) were prepared by direct compression after appropriate excipients were blended with the extrudate. The release amount was 5.10% in pH 1.0 hydrochloric acid at 2 h and over 90% in phosphoric acid buffer at 45 min, indicating the enteric-coating character of PZQ ODSRTs. Compared with the pharmacokinetics of marketed PZQ tablets (Aipuruike®) in dogs, the times to peak (Tmax), elimination half-life (t1/2λ) and mean residence time (MRT) were extended in PZQ ODSRTs, and the relative bioavailability of PZQ ODSRTs was up to 184.48% of that of Aipuruike®. This study suggested that PZQ ODSRTs may have potential for the clinical treatment of parasitosis.
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Affiliation(s)
- Xuemei Wen
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Zhaoyou Deng
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Yangfeng Xu
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Guoqing Yan
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Xin Deng
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Liqin Wu
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Qiuling Liang
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Fang Fang
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
| | - Xin Feng
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, Oxford, MS 38677, USA;
| | - Meiling Yu
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
- Correspondence: (M.Y.); (J.H.); Tel.: +86-771-3235635 (M.Y. & J.H.); Fax: +86-771-3270149 (M.Y. & J.H.)
| | - Jiakang He
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (X.W.); (Z.D.); (Y.X.); (G.Y.); (X.D.); (L.W.); (Q.L.); (F.F.)
- Correspondence: (M.Y.); (J.H.); Tel.: +86-771-3235635 (M.Y. & J.H.); Fax: +86-771-3270149 (M.Y. & J.H.)
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10
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Lim C, Kang JK, Jung CE, Sim T, Her J, Kang K, Lee ES, Youn YS, Choi HG, Oh KT. Preparation and Characterization of a Lutein Solid Dispersion to Improve Its Solubility and Stability. AAPS PharmSciTech 2021; 22:169. [PMID: 34080086 DOI: 10.1208/s12249-021-02036-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 04/27/2021] [Indexed: 11/30/2022] Open
Abstract
Lutein has been used as a dietary supplement for the treatment of eye diseases, especially age-related macular degeneration. For oral formulations, we investigated lutein stability in artificial set-ups mimicking different physiological conditions and found that lutein was degraded over time under acidic conditions. To enhance the stability of lutein upon oral intake, we developed enteric-coated lutein solid dispersions (SD) by applying a polymer, hydroxypropyl methylcellulose acetate succinate (HPMCAS-LF), through a solvent-controlled precipitation method. The SD were characterized in crystallinity, morphology, and drug entrapment. In the dissolution profile of lutein SD, a F80 formulation showed resistance toward the acidic environment under simulated gastric conditions while exhibiting a bursting drug release under simulated intestinal conditions. Our results highlight the potential use of HPMCAS-LF as an effective matrix to enhance lutein bioavailability during oral delivery and to provide novel insights into the eye-care supplement industry, with direct benefits for the health of patients.
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11
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Madsen CM, Plum J, Hens B, Augustijns P, Müllertz A, Rades T. Exploring the Impact of Intestinal Fluid Components on the Solubility and Supersaturation of Danazol. J Pharm Sci 2021; 110:2479-2488. [PMID: 33428916 DOI: 10.1016/j.xphs.2020.12.039] [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: 08/17/2020] [Revised: 11/10/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023]
Abstract
Eleven simulated intestinal fluids (SIF) were designed using a Design of Experiment (DoE) approach. The DoE SIF covered a range of compositions of fasted state human intestinal fluid (FaHIF) with regard to pH, bile salt (BS), and phospholipid (PL). Using the model compound danazol, the apparent crystalline solubility (aCS) and apparent amorphous solubility (aAS), as well as the supersaturation propensity was determined in the DoE SIF media. The aCS of danazol was dependent on the composition of the SIF, with PL as the main factor, and a small effect from BS and an interaction between BS and PL. From the DoE solubility data a model was derived, which could predict aCS in commercially available SIF (FaSSIF-V1 and -V2) and in a range of FaHIF. The aAS of danazol was differently affected by the SIF composition than the aCS; PL was again the main factor influencing the aAS, but interactions between BS and pH, as well as pH and PL were also important. The supersaturation propensities of danazol in the DoE SIF media were affected by the same factors as the aCS. Hence, the supersaturation behaviour and aCS of danazol, were found to be closely related.
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Affiliation(s)
- Cecilie Maria Madsen
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Pharmaceutical R&D, H. Lundbeck A/S, Valby, Denmark; Pharmaceutical Sciences, Janssen, Beerse, Belgium
| | - Jakob Plum
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Bart Hens
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Patrick Augustijns
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Anette Müllertz
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Bioneer:FARMA, University of Copenhagen, Copenhagen, Denmark.
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
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12
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Hu C, Zhang F, Fan H. Evaluation of Drug Dissolution Rate in Co-amorphous and Co-crystal Binary Drug Delivery Systems by Thermodynamic and Kinetic Methods. AAPS PharmSciTech 2021; 22:21. [PMID: 33389277 DOI: 10.1208/s12249-020-01864-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/24/2020] [Indexed: 11/30/2022] Open
Abstract
In order to better explain and predict the dissolution characteristics of binary drug delivery systems (BDDSs), the dissolution behaviors of co-crystal (CC) and co-amorphous (CA) systems of sacubitril (SCB) and valsartan (VST) were evaluated in vitro and in vivo by thermodynamic and kinetic methods. The CCs of SCB and VST were prepared into a CA state through rotary evaporation. Solid-state properties were systematically evaluated. Herein, based on the results from previous studies of single-phase systems, we used thermodynamic methods to evaluate the increase in drug dissolution rate after BDDSs change from the crystalline to the amorphous state. After comparing the predicted and measured dissolution rate enhancement of the CC and CA systems, this paper attempts to explain the dissolution rate characteristics of the BDDSs. We then evaluated the bioavailability of two BDDSs in beagle dogs to confirm that there was no discrepancy in vivo with the results obtained in vitro. The results exhibited that there is strong intermolecular interaction between SCB and VST and good physical stability for the CA system. Compared with the CC, the bioavailability of SCB and VST in the CA system increased by 313.9% and 130.5%, respectively. The predicted dissolution rate ratio between CC and CA systems and their actual intrinsic dissolution rates differed by only a factor of 2.5, demonstrating the good correlation between the predicted and measured values. In the future, this method could be expanded to a variety of new samples and exciting drug prospects.
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13
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Wang B, Liu F, Xiang J, He Y, Zhang Z, Cheng Z, Liu W, Tan S. A critical review of spray-dried amorphous pharmaceuticals: Synthesis, analysis and application. Int J Pharm 2020; 594:120165. [PMID: 33309835 DOI: 10.1016/j.ijpharm.2020.120165] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 12/06/2020] [Indexed: 12/12/2022]
Abstract
New drugs are frequently found with poor water-solubility in recent pharmaceutical projects, which brings difficulties of bioavailability for the clinical development of new drugs. When these drug compounds in a crystalline state are absorbed by gastrointestinal tract, their dissolution rates and absorption rates are very limited. Nowadays, various methods have been developed to improve the solubility, dissolution and bioavailability of drugs. According to the characteristics of drugs, this work suggests the use of spray drying technology to amorphize APIs (active pharmaceutical ingredients) to improve their bioavailability. This work reviews the properties of the spray-dried amorphous drugs, the progress made in drug synthesis and application, and the existing problems.
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Affiliation(s)
- Bo Wang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Fenglin Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Jia Xiang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Yongju He
- School of Materials Science and Engineering, Central South University, Changsha, Hunan 410013, China
| | - Zhibin Zhang
- Research and Development Department, Jiangsu Dawning Pharmaceutical Co., Ltd., Changzhou, Jiangsu 213162, China
| | - Zeneng Cheng
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Wenjie Liu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Songwen Tan
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China.
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14
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Synergistic Computational Modeling Approaches as Team Players in the Game of Solubility Predictions. J Pharm Sci 2020; 110:22-34. [PMID: 33217423 DOI: 10.1016/j.xphs.2020.10.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/23/2020] [Accepted: 10/28/2020] [Indexed: 11/23/2022]
Abstract
Several approaches to predict and model drug solubility have been used in the drug discovery and development processes during the last decades. Each of these approaches have their own benefits and place, and are typically used as standalone approaches rather than in concert. The synergistic effects of these are often overlooked, partly due to the need of computational experts to perform the modeling and simulations as well as analyzing the data obtained. Here we provide our views on how these different approaches can be used to retrieve more information on drug solubility, ranging from multivariate data analysis over thermodynamic cycle modeling to molecular dynamics simulations. We are discussing aqueous solubility as well as solubility in more complex mixed solvents and media with colloidal structures present. We conclude that the field of computational pharmaceutics is in its early days but with a bright future ahead. However, education of computational formulators with broad knowledge of modeling and simulation approaches is imperative if computational pharmaceutics is to reach its full potential.
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15
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Grzybowska K, Grzybowski A, Knapik-Kowalczuk J, Chmiel K, Woyna-Orlewicz K, Szafraniec-Szczęsny J, Antosik-Rogóż A, Jachowicz R, Kowalska-Szojda K, Lodowski P, Paluch M. Molecular Dynamics and Physical Stability of Ibuprofen in Binary Mixtures with an Acetylated Derivative of Maltose. Mol Pharm 2020; 17:3087-3105. [PMID: 32584584 PMCID: PMC7467776 DOI: 10.1021/acs.molpharmaceut.0c00517] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this paper, we explore the strategy increasingly used to improve the bioavailability of poorly water-soluble crystalline drugs by formulating their amorphous solid dispersions. We focus on the potential application of a low molecular weight excipient octaacetyl-maltose (acMAL) to prepare physically stable amorphous solid dispersions with ibuprofen (IBU) aimed at enhancing water solubility of the drug compared to that of its crystalline counterpart. We thoroughly investigate global and local molecular dynamics, thermal properties, and physical stability of the IBU+acMAL binary systems by using broadband dielectric spectroscopy and differential scanning calorimetry as well as test their water solubility and dissolution rate. The obtained results are extensively discussed by analyzing several factors considered to affect the physical stability of amorphous systems, including those related to the global mobility, such as plasticization/antiplasticization effects, the activation energy, fragility parameter, and the number of dynamically correlated molecules as well as specific intermolecular interactions like hydrogen bonds, supporting the latter by density functional theory calculations. The observations made for the IBU+acMAL binary systems and drawn recommendations give a better insight into our understanding of molecular mechanisms governing the physical stability of amorphous solid dispersions.
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Affiliation(s)
- Katarzyna Grzybowska
- Institute of Physics, University of Silesia in Katowice, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Andrzej Grzybowski
- Institute of Physics, University of Silesia in Katowice, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Justyna Knapik-Kowalczuk
- Institute of Physics, University of Silesia in Katowice, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Krzysztof Chmiel
- Institute of Physics, University of Silesia in Katowice, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Krzysztof Woyna-Orlewicz
- Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Joanna Szafraniec-Szczęsny
- Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Agata Antosik-Rogóż
- Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Renata Jachowicz
- Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland
| | - Katarzyna Kowalska-Szojda
- Institute of Chemistry, University of Silesia in Katowice, Szkolna Street 9, 40-006 Katowice, Poland
| | - Piotr Lodowski
- Institute of Chemistry, University of Silesia in Katowice, Szkolna Street 9, 40-006 Katowice, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia in Katowice, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
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16
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Hao C, Jin J, Xiong J, Yang Z, Gao L, Ma Y, Liu BF, Liu X, Chen Y, Zhang G. Polymorphs of DP-VPA Solid Solutions and Their Physicochemical Properties. J Pharm Sci 2020; 109:2156-2165. [PMID: 32240697 DOI: 10.1016/j.xphs.2020.03.017] [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: 01/13/2020] [Revised: 03/06/2020] [Accepted: 03/23/2020] [Indexed: 10/24/2022]
Abstract
Different solid forms possess various physicochemical properties, which can significantly affect the stability, bioavailability, and manufacturability of the final product. DP-VPA, a complex of 1-stearoyl-2-valproyl-sn-glycero-3-phosphatidylcholine (DP-VPA-C18) and 1-palmitoyl-2-valproyl-sn-glycero-3-phosphatidylcholine (DP-VPA-C16), is currently under development as an antiepileptic drug. DP-VPA-C16 and DP-VPA-C18 crystallize together in solid solution forms. The solid forms of DP-VPA solid solution were studied herein. Powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), dynamic vapor sorption (DVS) and optical microscopy were used to characterize the different crystalline forms, known as polymorphs. The physicochemical properties, including hygroscopicity, thermodynamic behavior, and relative stability, of each form were investigated. DVS analysis showed that DP-VPA solid solution reduced the hygroscopicity of DP-VPA-C16. The relative humidity stability study revealed that Forms A and B are relatively stable, while Forms A-1, B-1, C and D are highly unstable under natural humidity. Further analysis revealed that Form A transforms into Form B through milling. Given the physicochemical properties of the available physical forms, Form B may be the optimal form for the formulation and development of antiepileptic drugs.
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Affiliation(s)
- Chao Hao
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jian Jin
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Jiaying Xiong
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhengge Yang
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lanchang Gao
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yanqin Ma
- Nhwa Institute of Pharmaceutical Research, Jiangsu Nhwa Pharmaceutical Co., Ltd, 1 Yunhe Road, Xuzhou, Jiangsu 221116, China
| | - Bi-Feng Liu
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xin Liu
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yin Chen
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China.
| | - Guisen Zhang
- Department of Biomedical Engineering, Systems Biology Theme, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, School of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China.
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17
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Wani RJ, Sharma P, Zhong HA, Chauhan H. Preparation and Characterization of Griseofulvin Solid Dispersions. Assay Drug Dev Technol 2020; 18:109-118. [DOI: 10.1089/adt.2019.965] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Rajvi J. Wani
- College of Education and Human Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Puneet Sharma
- Glaxosmithkline Consumer Healthcare, Lincoln, Nebraska, USA
| | - H. Andy Zhong
- Department of Chemistry, University of Nebraska Omaha, Omaha, Nebraska, USA
| | - Harsh Chauhan
- School of Pharmacy and Health Professionals, Creighton University, Omaha, Nebraska, USA
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18
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Elucidation of alginate-drug miscibility on its crystal growth inhibition effect in supersaturated drug delivery system. Carbohydr Polym 2020; 230:115601. [DOI: 10.1016/j.carbpol.2019.115601] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/29/2019] [Accepted: 11/09/2019] [Indexed: 11/21/2022]
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19
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Johnson L, Hillmyer MA. Critical Excipient Properties for the Dissolution Enhancement of Phenytoin. ACS OMEGA 2019; 4:19116-19127. [PMID: 31763534 PMCID: PMC6868594 DOI: 10.1021/acsomega.9b02383] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/11/2019] [Indexed: 05/31/2023]
Abstract
Solubility-enhancing amorphous solid dispersions can aid in the oral delivery of hydrophobic, poorly soluble drugs. Effective solid dispersion excipients enable high supersaturation drug concentrations over biologically relevant time scales. The critical characteristics of an excipient that allow it to work well in a solid dispersion system are not well understood. We prepared poly(N-isopropylacrylamide), poly(N,N-dimethylacrylamide), and poly(N-hydroxyethylacrylamide) excipients of varying molar mass and examined their ability to improve the aqueous solubility of phenytoin, a Biopharmaceutical Class System Class II drug. Binary and ternary solid dispersions of phenytoin and these excipients, along with hydroxypropyl methylcellulose acetate succinate and hydroxypropyl methylcellulose, were prepared at 10 wt % drug loading. Dissolution behavior was studied at early time points (<1 min) and over the course of 6 h. Performance of the ternary solid dispersions was largely a function of the concentration of poly(N-isopropylacrylamide) present in micellar structures and the concentration of PNiPAm micelles in the dissolution media. We present several systems that achieved significant improvement of phenytoin solubility over a wide composition range at enhancement factors among the highest seen to date for phenytoin.
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20
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Nuances in the Calculation of Amorphous Solubility Enhancement Ratio. J Pharm Sci 2019; 108:3560-3574. [DOI: 10.1016/j.xphs.2019.06.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/17/2019] [Accepted: 06/26/2019] [Indexed: 11/17/2022]
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21
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Edueng K, Mahlin D, Gråsjö J, Nylander O, Thakrani M, Bergström CAS. Supersaturation Potential of Amorphous Active Pharmaceutical Ingredients after Long-Term Storage. Molecules 2019; 24:E2731. [PMID: 31357587 PMCID: PMC6696415 DOI: 10.3390/molecules24152731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 07/22/2019] [Accepted: 07/24/2019] [Indexed: 11/16/2022] Open
Abstract
This study explores the effect of physical aging and/or crystallization on the supersaturation potential and crystallization kinetics of amorphous active pharmaceutical ingredients (APIs). Spray-dried, fully amorphous indapamide, metolazone, glibenclamide, hydrocortisone, hydrochlorothiazide, ketoconazole, and sulfathiazole were used as model APIs. The parameters used to assess the supersaturation potential and crystallization kinetics were the maximum supersaturation concentration (Cmax,app), the area under the curve (AUC), and the crystallization rate constant (k). These were compared for freshly spray-dried and aged/crystallized samples. Aged samples were stored at 75% relative humidity for 168 days (6 months) or until they were completely crystallized, whichever came first. The solid-state changes were monitored with differential scanning calorimetry, Raman spectroscopy, and powder X-ray diffraction. Supersaturation potential and crystallization kinetics were investigated using a tenfold supersaturation ratio compared to the thermodynamic solubility using the µDISS Profiler. The physically aged indapamide and metolazone and the minimally crystallized glibenclamide and hydrocortisone did not show significant differences in their Cmax,app and AUC when compared to the freshly spray-dried samples. Ketoconazole, with a crystalline content of 23%, reduced its Cmax,app and AUC by 50%, with Cmax,app being the same as the crystalline solubility. The AUC of aged metolazone, one of the two compounds that remained completely amorphous after storage, significantly improved as the crystallization kinetics significantly decreased. Glibenclamide improved the most in its supersaturation potential from amorphization. The study also revealed that, besides solid-state crystallization during storage, crystallization during dissolution and its corresponding pathway may significantly compromise the supersaturation potential of fully amorphous APIs.
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Affiliation(s)
- Khadijah Edueng
- Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden
- Kulliyyah of Pharmacy, International Islamic University Malaysia, Jalan Istana, Bandar Indera Mahkota, 25200 Kuantan Pahang, Malaysia
| | - Denny Mahlin
- Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden
- AstraZeneca Operations, Forskargatan 18, 15185 Södertälje, Sweden
| | - Johan Gråsjö
- Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden
| | - Olivia Nylander
- Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden
| | - Manish Thakrani
- Department of Pharmacy, University College London (UCL), Brunswick Square, WC1N 1AX London, UK
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden.
- The Swedish Drug Delivery Forum, Department of Pharmacy, Uppsala University, BMC P.O. Box 580, Husargatan 3, 75123 Uppsala, Sweden.
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22
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Rawlinson-Malone CF, Ferreira AP, Nicholls D, Nicholson S. Elucidating spray-dried dispersion dissolution mechanisms with focused beam reflectance measurement: contribution of polymer chemistry and particle properties to performance. Pharm Dev Technol 2019; 24:1055-1062. [DOI: 10.1080/10837450.2018.1559189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | | | | | - Sarah Nicholson
- Bristol-Myers Squibb, Drug Product Science and Technology, Moreton, UK
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23
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Štukelj J, Svanbäck S, Agopov M, Löbmann K, Strachan CJ, Rades T, Yliruusi J. Direct Measurement of Amorphous Solubility. Anal Chem 2019; 91:7411-7417. [PMID: 31050887 PMCID: PMC6750642 DOI: 10.1021/acs.analchem.9b01378] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Amorphous
materials exhibit distinct physicochemical properties
compared to their respective crystalline counterparts. One of these
properties, the increased solubility of amorphous materials, is exploited
in the pharmaceutical industry as a way of increasing bioavailability
of poorly water-soluble drugs. Despite the increasing interest in
drug amorphization, the analytical physicochemical toolbox is lacking
a reliable method for direct amorphous solubility assessment. Here,
we show, for the first time, a direct approach to measure the amorphous
solubility of diverse drugs by combining optics with fluidics, the
single particle analysis (SPA) method. Moreover, a comparison was
made to a theoretical estimation based on thermal analysis and to
a standardized supersaturation and precipitation method. We have found
a good level of agreement between the three methods. Importantly,
the SPA method allowed for the first experimental measurement of the
amorphous solubility for griseofulvin, a fast crystallizing drug,
without the use of a crystallization inhibitor. In conclusion, the
SPA approach enables rapid and straightforward determination of the
supersaturation potential for amorphous materials of less than 0.1
mg, which could prove highly beneficial in the fields of materials
science, analytical chemistry, physical chemistry, food science, pharmaceutical
science, and others.
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Affiliation(s)
- Jernej Štukelj
- Department of Pharmaceutical Chemistry and Technology , University of Helsinki , Viikinkaari 5E , 00790 Helsinki , Finland.,The Solubility Company Oy , Viikinkaari 6 , 00790 Helsinki , Finland
| | - Sami Svanbäck
- Department of Pharmaceutical Chemistry and Technology , University of Helsinki , Viikinkaari 5E , 00790 Helsinki , Finland.,The Solubility Company Oy , Viikinkaari 6 , 00790 Helsinki , Finland
| | - Mikael Agopov
- The Solubility Company Oy , Viikinkaari 6 , 00790 Helsinki , Finland
| | - Korbinian Löbmann
- Department of Pharmacy , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - Clare J Strachan
- Department of Pharmaceutical Chemistry and Technology , University of Helsinki , Viikinkaari 5E , 00790 Helsinki , Finland
| | - Thomas Rades
- Department of Pharmacy , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - Jouko Yliruusi
- Department of Pharmaceutical Chemistry and Technology , University of Helsinki , Viikinkaari 5E , 00790 Helsinki , Finland.,The Solubility Company Oy , Viikinkaari 6 , 00790 Helsinki , Finland
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24
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Baghel S, Cathcart H, O’Reilly NJ. Investigation into the Solid-State Properties and Dissolution Profile of Spray-Dried Ternary Amorphous Solid Dispersions: A Rational Step toward the Design and Development of a Multicomponent Amorphous System. Mol Pharm 2018; 15:3796-3812. [DOI: 10.1021/acs.molpharmaceut.8b00306] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shrawan Baghel
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Pharmaceutical and Molecular Biotechnology Research Centre (PMBRC), Waterford Institute of Technology, Cork Road, Waterford, Ireland
| | - Helen Cathcart
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Pharmaceutical and Molecular Biotechnology Research Centre (PMBRC), Waterford Institute of Technology, Cork Road, Waterford, Ireland
| | - Niall J. O’Reilly
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Pharmaceutical and Molecular Biotechnology Research Centre (PMBRC), Waterford Institute of Technology, Cork Road, Waterford, Ireland
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25
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Zhang W, Haser A, Hou HH, Nagapudi K. Evaluation of Accuracy of Amorphous Solubility Advantage Calculation by Comparison with Experimental Solubility Measurement in Buffer and Biorelevant Media. Mol Pharm 2018. [DOI: 10.1021/acs.molpharmaceut.8b00125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Wei Zhang
- Small Molecule Pharmaceutical Sciences, Genentech Inc., South San Francisco, California 94080, United States
| | - Abbe Haser
- College of Pharmacy, University of Texas—Austin, Austin, Texas 78712, United States
| | - Hao Helen Hou
- Small Molecule Pharmaceutical Sciences, Genentech Inc., South San Francisco, California 94080, United States
| | - Karthik Nagapudi
- Small Molecule Pharmaceutical Sciences, Genentech Inc., South San Francisco, California 94080, United States
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26
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Blaabjerg LI, Lindenberg E, Löbmann K, Grohganz H, Rades T. Is there a correlation between the glass forming ability of a drug and its supersaturation propensity? Int J Pharm 2018; 538:243-249. [DOI: 10.1016/j.ijpharm.2018.01.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/02/2018] [Accepted: 01/03/2018] [Indexed: 10/18/2022]
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27
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Li Z, Lenk TI, Yao LJ, Bates FS, Lodge TP. Maintaining Hydrophobic Drug Supersaturation in a Micelle Corona Reservoir. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02297] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ziang Li
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Theodore I. Lenk
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Letitia J. Yao
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S. Bates
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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28
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Warnken Z, Puppolo M, Hughey J, Duarte I, Jansen-Varnum S. In Vitro–In Vivo Correlations of Carbamazepine Nanodispersions for Application in Formulation Development. J Pharm Sci 2018; 107:453-465. [DOI: 10.1016/j.xphs.2017.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 09/29/2017] [Accepted: 10/03/2017] [Indexed: 10/18/2022]
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29
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Elkhabaz A, Sarkar S, Dinh JK, Simpson GJ, Taylor LS. Variation in Supersaturation and Phase Behavior of Ezetimibe Amorphous Solid Dispersions upon Dissolution in Different Biorelevant Media. Mol Pharm 2017; 15:193-206. [PMID: 29161509 DOI: 10.1021/acs.molpharmaceut.7b00814] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The delivery of poorly water-soluble drugs using amorphous solid dispersions (ASDs) has been widely acknowledged as a promising strategy for enhancing oral bioavailability. Upon dissolution, ASDs have accelerated dissolution rates and yield supersaturated solutions leading to higher apparent solubilities. Understanding the complex phase behavior of ASDs during dissolution is crucial for developing an effective formulation. Since the absorption of a lipophilic, high permeability drug is determined primarily by the intraluminal dissolution process and the final concentration achieved, there is a need for evaluation in biorelevant dissolution media that simulate both fasting and fed gastrointestinal states. In this study, using ezetimibe as a model drug, three different ASDs were prepared using poly(acrylic acid) (PAA), polyvinylpyrrolidone (PVP), and hydroxypropyl methylcellulose acetyl succinate (HPMC-AS). Dissolution of ASDs was carried out in sodium phosphate buffer, fed-state simulated intestinal fluid (FeSSIF), and Ensure Plus to evaluate the impact of different dissolution media on release profile, supersaturation, and phase behavior. The supersaturation level and crystallization kinetics varied among the dispersions and were found to be highly dependent on the medium employed. The presence of solubilizing additives in biorelevant media greatly affected the generation and stabilization of supersaturated solutions. Second harmonic generation microscopy was found to enable the detection of crystals in all media including the highly turbid Ensure Plus system. In conclusion, it is important to evaluate the impact of complex biorelevant media on the dissolution performance of ASDs to better design supersaturating formulations for oral delivery.
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Affiliation(s)
- Ahmed Elkhabaz
- Department of Industrial and Physical Pharmacy, College of Pharmacy and ‡Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
| | - Sreya Sarkar
- Department of Industrial and Physical Pharmacy, College of Pharmacy and ‡Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
| | - Janny K Dinh
- Department of Industrial and Physical Pharmacy, College of Pharmacy and ‡Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
| | - Garth J Simpson
- Department of Industrial and Physical Pharmacy, College of Pharmacy and ‡Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy and ‡Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
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30
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Survival of the Fittest: Time-To-Event Modeling of Crystallization of Amorphous Poorly Soluble Drugs. J Pharm Sci 2017; 105:1858-1866. [PMID: 27238485 DOI: 10.1016/j.xphs.2016.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 03/06/2016] [Accepted: 03/11/2016] [Indexed: 11/20/2022]
Abstract
The objective of this study was to gain a quantitative understanding of the link between physicochemical properties and long-term and time-censored amorphous stability of poorly water-soluble drugs using parametric time-to-event modeling. Previously published data on amorphous stability and physicochemical properties of 25 structurally diverse neutral, poorly soluble compounds were used. To describe the general shape of the survival curve (probability of event at time >t), Constant, Gompertz, and Weibull hazard functions and their linear combinations were tested. For a selected Weibull hazard base model, the effect of each physicochemical covariate was investigated, with combined influence of enthalpy of fusion (Hf) and molecular weight (Mr) showing the highest statistical significance. The covariate model was used to simulate survival curves and calculate the median survival time for different values of Hf and Mr. It was found that a decrease in Hf or an increase in Mr contribute to longer survival times. The derived model equation was validated against external data sets consisting of 11 compounds. It showed better predictive ability than a previously published multiple linear regression model incorporating Hf and Mr. The proposed Weibull covariate model may assist in faster and more cost-effective decision making in the pre-formulation phase of drug development, where compound properties and appropriate drug formulation strategies are investigated.
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31
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Kleppe MS, Haskell RJ, Bogner RH. Biorelevant Media Slows the Solution-Mediated Phase Transformation of Amorphous Spironolactone. J Pharm Sci 2017; 107:426-435. [PMID: 29122582 DOI: 10.1016/j.xphs.2017.10.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/05/2017] [Accepted: 10/23/2017] [Indexed: 10/18/2022]
Abstract
Solution-mediated phase transformation (SMPT) can reduce the high drug concentration expected from amorphous formulations, eliminating the improvement in drug absorption one hoped to gain from this high energy drug state. The differences in SMPT of a supersaturating system were compared in biorelevant media (fasted state simulated intestinal fluid and fed state simulated intestinal fluid) and United States Pharmacopeia compendial medium, simulated intestinal fluid without pancreatin. Amorphous spironolactone underwent SMPT to the same hydrate of spironolactone in all 3 media which was confirmed by the decrease in dissolution rates assessed in a flow-through dissolution apparatus, as well as by the appearance of crystals on the amorphous solid surface detected by polarized light microscopy. Longer duration of supersaturation which may lead to greater in vivo oral drug absorption was found in both biorelevant media, compared to compendial (average > 90 vs. 20 min), indicating that the presence of surfactants in biorelevant media delays crystal growth. Surface profiles and polarized light micrographs suggest that (1) a significant increase in surface area due to 3D crystal formation, (2) amorphous areas remaining exposed on the surface, and (3) a lower nucleation rate are potential reasons for an elevated dissolution rate even after SMPT.
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Affiliation(s)
- Mary S Kleppe
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut 06269
| | - Roy J Haskell
- Formulation R&D, Arvinas Inc, New Haven, Connecticut 06511
| | - Robin H Bogner
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut 06269.
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32
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Newman A, Reutzel-Edens SM, Zografi G. Coamorphous Active Pharmaceutical Ingredient-Small Molecule Mixtures: Considerations in the Choice of Coformers for Enhancing Dissolution and Oral Bioavailability. J Pharm Sci 2017; 107:5-17. [PMID: 28989014 DOI: 10.1016/j.xphs.2017.09.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 09/19/2017] [Accepted: 09/22/2017] [Indexed: 10/18/2022]
Abstract
In the recent years, coamorphous systems, containing an active pharmaceutical ingredient (API) and a small molecule coformer have appeared as alternatives to the use of either amorphous solid dispersions containing polymer or cocrystals of API and small molecule coformers, to improve the dissolution and oral bioavailability of poorly soluble crystalline API. This Commentary article considers the relative properties of amorphous solid dispersions and coamorphous systems in terms of methods of preparation; miscibility; glass transition temperature; physical stability; hygroscopicity; and aqueous dissolution. It also considers important questions concerning the fundamental criteria to be used for the proper selection of a small molecule coformer regarding its ability to form either coamorphous or cocrystal systems. Finally, we consider various aspects of product development that are specifically associated with the formulation of commercial coamorphous systems as solid oral dosage forms. These include coformer selection; screening; methods of preparation; preformulation; physical stability; bioavailability; and final formulation. Through such an analysis of coamorphous API-small molecule coformer systems, against the more widely studied API-polymer dispersions and cocrystals, it is believed that the strengths and weaknesses of coamorphous systems can be better understood, leading to more efficient formulation and manufacture of such systems for enhancing oral bioavailability.
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Affiliation(s)
- Ann Newman
- Seventh Street Development Group LLC, Kure Beach, North Carolina 28449.
| | - Susan M Reutzel-Edens
- Small Molecule Design and Development, Eli Lilly and Company, Indianapolis, Indiana 46285
| | - George Zografi
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53706
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33
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Colombo M, Orthmann S, Bellini M, Staufenbiel S, Bodmeier R. Influence of Drug Brittleness, Nanomilling Time, and Freeze-Drying on the Crystallinity of Poorly Water-Soluble Drugs and Its Implications for Solubility Enhancement. AAPS PharmSciTech 2017; 18:2437-2445. [PMID: 28168626 DOI: 10.1208/s12249-017-0722-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 01/16/2017] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to assess whether wet bead milling of dexamethasone and tacrolimus suspensions leads to a lower degree of crystallinity of nanocrystals, and if the degree of crystallinity affects the drug solubility, in addition to particle size. Powder X-ray diffraction (XRD) was used to determine the degree of crystallinity of the particles, which decreased during milling until reaching a plateau: the particles had ∼79% degree of crystallinity after 5 h milling. Different milling times were required for the two drugs in order to reach their plateaux, 2 h for dexamethasone and 3 h for tacrolimus. These results could be explained with the brittleness of the drugs. Dexamethasone was more brittle than tacrolimus, with an apparent elastic modulus of 16 GPa compared to ∼12 GPa of tacrolimus. Freeze-drying the nanosuspensions resulted in a reduction in the degree of crystallinity to ∼35% for dexamethasone and to ∼45% for tacrolimus in comparison to non-freeze-dried particles. Solubility studies were performed with a Sirius® inForm based on in situ UV/VIS spectroscopy. The reduced degree of crystallinity of nanocrystals after milling was responsible, in addition to the nanoparticle size, for the solubility increase. Indeed, while the smallest particle size (394 nm for dexamethasone and 240 nm for tacrolimus) did not always result in the highest increase in solubility (factor of 1.04 for dexamethasone and 1.3 with tacrolimus), the smallest degree of crystallinity was always characteristic of the maximum solubility obtained (factor of 1.15 for dexamethasone and 1.7 for tacrolimus).
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34
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Chmiel K, Knapik-Kowalczuk J, Jurkiewicz K, Sawicki W, Jachowicz R, Paluch M. A New Method To Identify Physically Stable Concentration of Amorphous Solid Dispersions (I): Case of Flutamide + Kollidon VA64. Mol Pharm 2017; 14:3370-3380. [PMID: 28787567 DOI: 10.1021/acs.molpharmaceut.7b00382] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In this paper, a novel approach to determine stable concentration in API-polymer systems is presented. As a model, binary amorphous mixtures flutamide (FL) drug with a copolymer Kollidon VA64 (PVP/VA) have been used. It is worthwhile to note that finding an effective method to achieve this goal is a matter of great importance because physical stability of the amorphous pharmaceuticals is the key issue that is investigated worldwide. Due to the fact that molecular dynamics was found to be the crucial factor affecting physical stability of disordered pharmaceuticals, we examined it for both neat FL and its PVP/VA mixtures by means of broadband dielectric spectroscopy (BDS). Thorough investigation of the impact of polymeric additive on the molecular mobility of disordered FL reveals unusual, previously unreported behavior. Namely, simultaneously with the beginning of the recrystallization process, we observe some transformation from unstable supersaturated concentration of investigated mixture to the different, unknown concentration of FL-PVP/VA. Observed, during BDS experiment, transformation enables us to determine the limiting, highly physically stable concentration of FL in PVP/VA polymer (saturated solution), which is equivalent to FL + 41% wt. of PVP/VA. The described high physical stability of this unveiled system has been confirmed by means of long-term XRD measurements. According to our knowledge, this is the first time when such a behavior has been observed by means of BDS.
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Affiliation(s)
- K Chmiel
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzow, Poland
| | - J Knapik-Kowalczuk
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzow, Poland
| | - K Jurkiewicz
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzow, Poland
| | - W Sawicki
- Department of Physical Chemistry, Medical University of Gdansk , 84-416 Gdansk, Poland
| | - R Jachowicz
- Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Jagiellonian University , Medyczna 9, 30-688 Kraków, Poland
| | - M Paluch
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzow, Poland
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35
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Ricarte RG, Li Z, Johnson LM, Ting JM, Reineke TM, Bates FS, Hillmyer MA, Lodge TP. Direct Observation of Nanostructures during Aqueous Dissolution of Polymer/Drug Particles. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00372] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ralm G. Ricarte
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Ziang Li
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Lindsay M. Johnson
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Jeffrey M. Ting
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Theresa M. Reineke
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Frank S. Bates
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Marc A. Hillmyer
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Timothy P. Lodge
- Department
of Chemical Engineering and Materials Science and ‡Department of
Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
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36
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Li Z, Johnson LM, Ricarte RG, Yao LJ, Hillmyer MA, Bates FS, Lodge TP. Enhanced Performance of Blended Polymer Excipients in Delivering a Hydrophobic Drug through the Synergistic Action of Micelles and HPMCAS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2837-2848. [PMID: 28282137 DOI: 10.1021/acs.langmuir.7b00325] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Blends of hydroxypropyl methylcellulose acetate succinate (HPMCAS) and dodecyl (C12)-tailed poly(N-isopropylacrylamide) (PNIPAm) were systematically explored as a model system to dispense the active ingredient phenytoin by rapid dissolution, followed by the suppression of drug crystallization for an extended period. Dynamic and static light scattering revealed that C12-PNIPAm polymers, synthesized by reversible addition-fragmentation chain-transfer polymerization, self-assembled into micelles with dodecyl cores in phosphate-buffered saline (PBS, pH 6.5). A synergistic effect on drug supersaturation was documented during in vitro dissolution tests by varying the blending ratio, with HPMACS primarily aiding in rapid dissolution and PNIPAm maintaining supersaturation. Polarized light and cryogenic transmission electron microscopy experiments revealed that C12-PNIPAm micelles maintain drug supersaturation by inhibiting both crystal nucleation and growth. Cross-peaks between the phenyl group of phenytoin and the isopropyl group of C12-PNIPAm in 2D 1H nuclear Overhauser effect (NOESY) spectra confirmed the existence of drug-polymer intermolecular interactions in solution. Phenytoin and polymer diffusion coefficients, measured by diffusion-ordered NMR spectroscopy (DOSY), demonstrated that the drug-polymer association constant increased with increasing local density of the corona chains, coincident with a reduction in C12-PNIPAm molecular weight. These findings demonstrate a new strategy for exploiting the versatility of polymer blends through the use of self-assembled micelles in the design of advanced excipients.
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Affiliation(s)
- Ziang Li
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Lindsay M Johnson
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Ralm G Ricarte
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Letitia J Yao
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Marc A Hillmyer
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Frank S Bates
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Timothy P Lodge
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
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37
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Grzybowska K, Chmiel K, Knapik-Kowalczuk J, Grzybowski A, Jurkiewicz K, Paluch M. Molecular Factors Governing the Liquid and Glassy States Recrystallization of Celecoxib in Binary Mixtures with Excipients of Different Molecular Weights. Mol Pharm 2017; 14:1154-1168. [DOI: 10.1021/acs.molpharmaceut.6b01056] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. Grzybowska
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - K. Chmiel
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - J. Knapik-Kowalczuk
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - A. Grzybowski
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - K. Jurkiewicz
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - M. Paluch
- Institute
of Physics, University of Silesia in Katowice, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
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38
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Dissolution behavior of co-amorphous amino acid-indomethacin mixtures: The ability of amino acids to stabilize the supersaturated state of indomethacin. Eur J Pharm Biopharm 2017; 112:85-95. [DOI: 10.1016/j.ejpb.2016.11.023] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 02/06/2023]
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39
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Colombo M, Staufenbiel S, Rühl E, Bodmeier R. In situ determination of the saturation solubility of nanocrystals of poorly soluble drugs for dermal application. Int J Pharm 2017; 521:156-166. [PMID: 28223247 DOI: 10.1016/j.ijpharm.2017.02.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 02/09/2017] [Accepted: 02/10/2017] [Indexed: 10/20/2022]
Abstract
The aim of this study was to determine, in situ, the saturation solubility and dissolution rate of nanocrystals of three poorly water-soluble drugs for dermal application. The nanocrystals were prepared by wet bead milling. Their size could be controlled by various process parameters. The saturation solubility was measured in water or in the presence of surfactant at 32°C with a Sirius® inForm based on in situ UV-vis spectroscopy. The saturation solubility of nanocrystals with sizes of ∼300nm increased for each drug in comparison to non-milled drug powders, with factors of increase in the range 1.3-2.8. The tacrolimus solubility was further analyzed with excess nanocrystal amounts four and ten times higher than the drug powder solubility. The corresponding solubility increases were 2.8 and 6.6 and thus dependent on the amount of excess nanocrystals. The higher increase was due to the presence of a larger fraction of small size particles, and only crystals far below 1μm showed supersaturation. The solubility increase for nanocrystals determined in situ was remarkably lower than the one previously reported with the use of non in situ methods. Nanomilling increased the drug dissolution rates: the highest increase was obtained with ibuprofen (rate increase ∼30).
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Affiliation(s)
- Miriam Colombo
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany
| | - Sven Staufenbiel
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany
| | - Eckart Rühl
- Physical Chemistry, Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Roland Bodmeier
- College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany.
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40
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Solubility Advantage (and Disadvantage) of Pharmaceutical Amorphous Solid Dispersions. J Pharm Sci 2016; 105:3549-3561. [DOI: 10.1016/j.xphs.2016.08.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 07/06/2016] [Accepted: 08/23/2016] [Indexed: 11/17/2022]
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41
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Han YR, Lee PI. Effect of Extent of Supersaturation on the Evolution of Kinetic Solubility Profiles. Mol Pharm 2016; 14:206-220. [DOI: 10.1021/acs.molpharmaceut.6b00788] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi Rang Han
- Department of Pharmaceutical
Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario M5S 3M2, Canada
| | - Ping I. Lee
- Department of Pharmaceutical
Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario M5S 3M2, Canada
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42
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Trasi NS, Purohit HS, Wen H, Sun DD, Taylor LS. Non-Sink Dissolution Behavior and Solubility Limit of Commercial Tacrolimus Amorphous Formulations. J Pharm Sci 2016; 106:264-272. [PMID: 27816263 DOI: 10.1016/j.xphs.2016.09.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 08/31/2016] [Accepted: 09/16/2016] [Indexed: 11/16/2022]
Abstract
An increasing number of drugs with low aqueous solubility are being formulated and marketed as amorphous solid dispersions because the amorphous form can generate a higher solubility compared to the crystalline solid. The amorphous solubility of a drug can be determined experimentally using various techniques. Most studies in this area investigate the drug in its pure form and do not evaluate any effects from other formulation ingredients. In this study, we use 6 marketed amorphous oral drug products, capsules containing 5 mg of tacrolimus, and various excipients, consisting of 1 innovator product and 5 generics. The amorphous solubility of tacrolimus was evaluated using different techniques and was compared to the crystalline solubility of the drug. Dissolution of the different products was conducted under non-sink conditions to compare the maximum achieved concentration with the amorphous solubility. Diffusion studies were performed to elucidate the maximum flux across a membrane and to evaluate whether there was any difference in the thermodynamic activity of the drug released from the formulation and the pure drug. The amorphous solubility of tacrolimus was found to be a factor of 35 higher than the crystalline solubility. The maximum concentration obtained after dissolution of the capsule contents in non-sink conditions was found to match the experimentally determined amorphous solubility of the pure drug. Furthermore, the membrane flux of tacrolimus following dissolution of the various formulations was found to be similar and maximized. This study demonstrates a link between key physicochemical properties (amorphous solubility) and in vitro formulation performance.
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Affiliation(s)
- Niraj S Trasi
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Hitesh S Purohit
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Hong Wen
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland 20993
| | - Dajun D Sun
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland 20993
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907.
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43
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Krupa A, Descamps M, Willart JF, Strach B, Wyska E, Jachowicz R, Danède F. High-Energy Ball Milling as Green Process To Vitrify Tadalafil and Improve Bioavailability. Mol Pharm 2016; 13:3891-3902. [PMID: 27618666 DOI: 10.1021/acs.molpharmaceut.6b00688] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In this study, the suitability of high-energy ball milling was investigated with the aim to vitrify tadalafil (TD) and improve its bioavailability. To achieve this goal, pure TD as well as binary mixtures composed of the drug and Soluplus (SL) were coprocessed by high-energy ball milling. Modulated differential scanning calorimetry (MDSC) and X-ray powder diffraction (XRD) demonstrated that after such coprocessing, the crystalline form of TD was transformed into an amorphous form. The presence of a single glass transition (Tg) for all the comilled formulations indicated that TD was dispersed into SL at the molecular level, forming amorphous molecular alloys, regardless of the drug concentration. The high values of Tg determined for amorphous formulations, ranging from 70 to 147 °C, foreshow their high stability during storage at room temperature, which was verified by XRD and MDSC studies. The stabilizing effect of SL on the amorphous form of TD in comilled formulations was confirmed. Dissolution tests showed immediate drug release with sustained supersaturation in either simulated gastric fluid of pH 1.2 or in phosphate buffer of pH 7.2. The beneficial effect of both amorphization and coamorphization on the bioavailability of TD was found. In comparison to aqueous suspension, the relative bioavailability of TD was only 11% for its crystalline form and 53% for the crystalline physical mixture, whereas the bioavailability of milled amorphous TD and the comilled solid dispersion was 128% and 289%, respectively. Thus, the results provide evidence that not only the presence of polymeric surfactant but also the vitrification of TD is necessary to improve bioavailability.
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Affiliation(s)
- Anna Krupa
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Collegium Medicum , 9 Medyczna Street, Cracow, Poland
| | - Marc Descamps
- UMET, Unité Matériaux et Transformations, CNRS, INRA, University of Lille , F 59 000 Lille, France
| | - Jean-François Willart
- UMET, Unité Matériaux et Transformations, CNRS, INRA, University of Lille , F 59 000 Lille, France
| | - Beata Strach
- Department of Pharmacokinetics and Physical Pharmacy, Faculty of Pharmacy, Jagiellonian University Collegium Medicum , 9 Medyczna Street, Cracow, Poland
| | - Elżbieta Wyska
- Department of Pharmacokinetics and Physical Pharmacy, Faculty of Pharmacy, Jagiellonian University Collegium Medicum , 9 Medyczna Street, Cracow, Poland
| | - Renata Jachowicz
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Jagiellonian University Collegium Medicum , 9 Medyczna Street, Cracow, Poland
| | - Florence Danède
- UMET, Unité Matériaux et Transformations, CNRS, INRA, University of Lille , F 59 000 Lille, France
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Bhugra C, Telang C, Schwabe R, Zhong L. Reduced Crystallization Temperature Methodology for Polymer Selection in Amorphous Solid Dispersions: Stability Perspective. Mol Pharm 2016; 13:3326-33. [PMID: 27414755 DOI: 10.1021/acs.molpharmaceut.6b00315] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
API-polymer interactions, used to select the right polymeric matrix with an aim to stabilize an amorphous dispersion, are routinely studied using spectroscopic and/or calorimetric techniques (i.e., melting point depression). An alternate selection tool has been explored to rank order polymers for formation of stable amorphous dispersions as a pragmatic method for polymer selection. Reduced crystallization temperature of API, a parameter introduced by Zhou et al.,1 was utilized in this study for rank ordering interactions in API-polymeric systems. The trends in reduced crystallization temperature monitored over polymer concentration range of up to 20% polymer loading were utilized to calculate "crystallization parameter" or CP for two model systems (nifedipine and BI ABC). The rank order of CP, i.e., a measure of API-polymer interaction, for nifedipine followed the order PVP > PVP-VA > Soluplus > HPMCAS > PV Ac > PAA. This rank ordering was correlated to published results of molecular interactions and physical stability for nifedipine. A different rank ordering was observed for BI ABC: PAA > PVP > HPMCAS > Soluplus > PVPV-VA > PVAc. Interactions for BI ABC were not as differentiated when compared to nifedipine based on CP trends. BI ABC dispersions at drug loadings between 40 and 60% were physically stable for prolonged periods under ICH conditions as well as accelerated stress. We propose that large CP differences among polymers could be predictive of stability outcomes. Acceptable stability at pharmaceutically relevant drug loadings would suggest that the relative influence of downstream processes, such as polymer solubility in various solvents, process suitability and selection, and more importantly supersaturation potential, should be higher compared to stability considerations while developing compounds like BI ABC.
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Affiliation(s)
- Chandan Bhugra
- Pharmaceutical Development, Boehringer-Ingelheim Pharmaceuticals Inc. , Ridgefield, Connecticut 06877, United States
| | - Chitra Telang
- Pharmaceutical Development, Boehringer-Ingelheim Pharmaceuticals Inc. , Ridgefield, Connecticut 06877, United States
| | - Robert Schwabe
- Pharmaceutical Development, Boehringer-Ingelheim Pharmaceuticals Inc. , Ridgefield, Connecticut 06877, United States
| | - Li Zhong
- Pharmaceutical Development, Boehringer-Ingelheim Pharmaceuticals Inc. , Ridgefield, Connecticut 06877, United States
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Skrdla PJ, Floyd PD, Dell'orco PC. Practical Estimation of Amorphous Solubility Enhancement Using Thermoanalytical Data: Determination of the Amorphous/Crystalline Solubility Ratio for Pure Indomethacin and Felodipine. J Pharm Sci 2016; 105:2625-2630. [DOI: 10.1016/j.xphs.2016.03.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 02/29/2016] [Accepted: 03/30/2016] [Indexed: 10/21/2022]
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Ricarte RG, Lodge TP, Hillmyer MA. Nanoscale Concentration Quantification of Pharmaceutical Actives in Amorphous Polymer Matrices by Electron Energy-Loss Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7411-9. [PMID: 27419264 DOI: 10.1021/acs.langmuir.6b01745] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We demonstrated the use of electron energy-loss spectroscopy (EELS) to evaluate the composition of phenytoin:hydroxypropyl methylcellulose acetate succinate (HPMCAS) spin-coated solid dispersions (SDs). To overcome the inability of bright-field and high-angle annular dark-field TEM imaging to distinguish between glassy drug and polymer, we used the π-π* transition peak in the EELS spectrum to detect phenytoin within the HPMCAS matrix of the SD. The concentration of phenytoin within SDs of 10, 25, and 50 wt % drug loading was quantified by a multiple least-squares analysis. Evaluating the concentration of 50 different regions in each SD, we determined that phenytoin and HPMCAS are intimately mixed at a length scale of 200 nm, even for drug loadings up to 50 wt %. At length scales below 100 nm, the variance of the measured phenytoin concentration increases; we speculate that this increase is due to statistical fluctuations in local concentration and chemical changes induced by electron irradiation. We also performed EELS analysis of an annealed 25 wt % phenytoin SD and showed that the technique can resolve concentration differences between regions that are less than 50 nm apart. Our findings indicate that EELS is a useful tool for quantifying, with high accuracy and sub-100 nm spatial resolution, the composition of many pharmaceutical and soft matter systems.
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Affiliation(s)
- Ralm G Ricarte
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States
| | - Timothy P Lodge
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States
| | - Marc A Hillmyer
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States
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Initial Drug Dissolution from Amorphous Solid Dispersions Controlled by Polymer Dissolution and Drug-Polymer Interaction. Pharm Res 2016; 33:2445-58. [PMID: 27283830 DOI: 10.1007/s11095-016-1969-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/06/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To identify the key formulation factors controlling the initial drug and polymer dissolution rates from an amorphous solid dispersion (ASD). METHODS Ketoconazole (KTZ) ASDs using PVP, PVP-VA, HMPC, or HPMC-AS as polymeric matrix were prepared. For each drug-polymer system, two types of formulations with the same composition were prepared: 1. Spray dried dispersion (SDD) that is homogenous at molecular level, 2. Physical blend of SDD (80% drug loading) and pure polymer (SDD-PB) that is homogenous only at powder level. Flory-Huggins interaction parameters (χ) between KTZ and the four polymers were obtained by Flory-Huggins model fitting. Solution (13)C NMR and FT-IR were conducted to investigate the specific drug-polymer interaction in the solution and solid state, respectively. Intrinsic dissolution of both the drug and the polymer from ASDs were studied using a Higuchi style intrinsic dissolution apparatus. PXRD and confocal Raman microscopy were used to confirm the absence of drug crystallinity on the tablet surface before and after dissolution study. RESULTS In solid state, KTZ is completely miscible with PVP, PVP-VA, or HPMC-AS, demonstrated by the negative χ values of -0.36, -0.46, -1.68, respectively; while is poorly miscible with HPMC shown by a positive χ value of 0.23. According to solution (13)C NMR and FT-IR studies, KTZ interacts with HPMC-AS strongly through H-bonding and dipole induced interaction; with PVPs and PVP-VA moderately through dipole-induced interactions; and with HPMC weakly without detectable attractive interaction. Furthermore, the "apparent" strength of drug-polymer interaction, measured by the extent of peak shift on NMR or FT-IR spectra, increases with the increasing number of interacting drug-polymer pairs. For ASDs with the presence of considerable drug-polymer interactions, such as KTZ/PVPs, KTZ/PVP-VA, or KTZ /HPMC-AS systems, drug released at the same rate as the polymer when intimate drug-polymer mixing was ensured (i.e., the SDD systems); while drug released much slower than the polymer when molecular level mixing or drug-polymer interaction was absent (SDD-PB systems). For ASDs without drug-polymer interaction (i.e., KTZ/HPMC systems), the mixing homogeneity had little impact on the release rate of either the drug or the polymer thus SDD and SDD-PB demonstrated the same drug or polymer release rate, while the drug released slowly and independently of polymer release. CONCLUSIONS The initial drug release from an ASD was controlled by 1) the polymer release rate; 2) the strength of drug-polymer interaction, including the intrinsic interaction caused by the chemistry of the drug and the polymer (measured by the χ value), as well as that the apparent interaction caused by the drug-polymer ratio (measure by the extent of peak shift on spectroscopic analysis); and 3) the level of mixing homogeneity between the drug and polymer. In summary, the selection of polymer, drug-polymer ratio, and ASD processing conditions have profound impacts on the dissolution behavior of ASDs. Graphical Abstract Relationship between initial drug and polymer dissolution rates from amorphous solid dispersions with different mixing uniformity and drug-polymer interactions.
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Mah PT, Peltonen L, Novakovic D, Rades T, Strachan CJ, Laaksonen T. The effect of surfactants on the dissolution behavior of amorphous formulations. Eur J Pharm Biopharm 2016; 103:13-22. [DOI: 10.1016/j.ejpb.2016.03.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 02/25/2016] [Accepted: 03/03/2016] [Indexed: 12/24/2022]
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Grzybowska K, Capaccioli S, Paluch M. Recent developments in the experimental investigations of relaxations in pharmaceuticals by dielectric techniques at ambient and elevated pressure. Adv Drug Deliv Rev 2016; 100:158-82. [PMID: 26705851 DOI: 10.1016/j.addr.2015.12.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 12/05/2015] [Accepted: 12/09/2015] [Indexed: 10/22/2022]
Abstract
In recent years, there is a growing interest in improving the physicochemical stability of amorphous pharmaceutical solids due to their very promising applications to manufacture medicines characterized by a better water solubility, and consequently by a higher dissolution rate than those of their crystalline counterparts. In this review article, we show that the molecular mobility investigated both in the supercooled liquid and glassy states is the crucial factor required to understand molecular mechanisms that govern the physical stability of amorphous drugs. We demonstrate that pharmaceuticals can be thoroughly examined by means of the broadband dielectric spectroscopy, which is a very useful experimental technique to explore different relaxation processes and crystallization kinetics as well. Such studies conducted in the wide temperature and pressure ranges provide data needed in searching correlations between properties of molecular dynamics and crystallization process, which are aimed at developing effective and efficient methods for stabilizing amorphous drugs.
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Cysewski P. Transferability of cocrystallization propensities between aromatic and heteroaromatic amides. Struct Chem 2016. [DOI: 10.1007/s11224-016-0760-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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