201
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Mann AKP, Schenck L, Koynov A, Rumondor ACF, Jin X, Marota M, Dalton C. Producing Amorphous Solid Dispersions via Co-Precipitation and Spray Drying: Impact to Physicochemical and Biopharmaceutical Properties. J Pharm Sci 2017; 107:183-191. [PMID: 28711592 DOI: 10.1016/j.xphs.2017.07.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/05/2017] [Accepted: 07/06/2017] [Indexed: 11/18/2022]
Abstract
Many small-molecule active pharmaceutical ingredients (APIs) exhibit low aqueous solubility and benefit from generation of amorphous dispersions of the API and polymer to improve their dissolution properties. Spray drying and hot-melt extrusion are 2 common methods to produce these dispersions; however, for some systems, these approaches may not be optimal, and it would be beneficial to have an alternative route. Herein, amorphous solid dispersions of compound A, a low-solubility weak acid, and copovidone were made by conventional spray drying and co-precipitation. The physicochemical properties of the 2 materials were assessed via X-ray diffraction, differential scanning calorimetry, thermal gravimetric analysis, and scanning electron microscopy. The amorphous dispersions were then formulated and tableted, and the performance was assessed in vivo and in vitro. In human dissolution studies, the co-precipitation tablets had slightly slower dissolution than the spray-dried dispersion, but both reached full release of compound A. In canine in vitro dissolution studies, the tablets showed comparable dissolution profiles. Finally, canine pharmacokinetic studies showed that the materials had comparable values for the area under the curve, bioavailability, and Cmax. Based on the summarized data, we conclude that for some APIs, co-precipitation is a viable alternative to spray drying to make solid amorphous dispersions while maintaining desirable physicochemical and biopharmaceutical characteristics.
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Affiliation(s)
- Amanda K P Mann
- Department of Analytical Sciences, Pharmaceutical Sciences and Clinical Supplies, MRL, Rahway, New Jersey 07065.
| | - Luke Schenck
- Department of Chemical Engineering Research and Development, Chemistry, MRL, Rahway, New Jersey 07065
| | - Athanas Koynov
- Department of Chemical Engineering Research and Development, Chemistry, MRL, Rahway, New Jersey 07065
| | | | - Xiaoling Jin
- Analytical Sciences, Merck Animal Health, Rahway, New Jersey 07065
| | - Melanie Marota
- Formulation Sciences, Pharmaceutical Sciences and Clinical Supplies, MRL, Rahway, New Jersey 07065
| | - Chad Dalton
- Department of Preformulation Sciences, Pharmaceutical Sciences and Clinical Supplies, MRL, Rahway, New Jersey 07065
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202
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Konnerth C, Braig V, Ito A, Schmidt J, Lee G, Peukert W. Formation of Mefenamic Acid Nanocrystals with Improved Dissolution Characteristics. CHEM-ING-TECH 2017. [DOI: 10.1002/cite.201600190] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Christoph Konnerth
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Institute of Particle Technology; Cauerstraße 4 91058 Erlangen Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Cluster of Excellence - Engineering of Advanced Material (EAM); Nägelsbachstraße 49b 91058 Erlangen Germany
| | - Veronika Braig
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Division of Pharmaceutics, Cauerstraße 4; 91058 Erlangen Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Cluster of Excellence - Engineering of Advanced Material (EAM); Nägelsbachstraße 49b 91058 Erlangen Germany
| | - Atsutoshi Ito
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Institute of Particle Technology; Cauerstraße 4 91058 Erlangen Germany
| | - Jochen Schmidt
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Institute of Particle Technology; Cauerstraße 4 91058 Erlangen Germany
| | - Geoffrey Lee
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Division of Pharmaceutics, Cauerstraße 4; 91058 Erlangen Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Cluster of Excellence - Engineering of Advanced Material (EAM); Nägelsbachstraße 49b 91058 Erlangen Germany
| | - Wolfgang Peukert
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Institute of Particle Technology; Cauerstraße 4 91058 Erlangen Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU); Cluster of Excellence - Engineering of Advanced Material (EAM); Nägelsbachstraße 49b 91058 Erlangen Germany
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203
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Shi Q, Zhang C, Su Y, Zhang J, Zhou D, Cai T. Acceleration of Crystal Growth of Amorphous Griseofulvin by Low-Concentration Poly(ethylene oxide): Aspects of Crystallization Kinetics and Molecular Mobility. Mol Pharm 2017; 14:2262-2272. [DOI: 10.1021/acs.molpharmaceut.7b00097] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Chen Zhang
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | | | | | - Dongshan Zhou
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
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204
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Meunier M, Goupil A, Lienard P. Predicting drug loading in PLA-PEG nanoparticles. Int J Pharm 2017; 526:157-166. [DOI: 10.1016/j.ijpharm.2017.04.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/11/2017] [Accepted: 04/18/2017] [Indexed: 12/26/2022]
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205
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Ganesh AN, Logie J, McLaughlin CK, Barthel BL, Koch TH, Shoichet BK, Shoichet MS. Leveraging Colloidal Aggregation for Drug-Rich Nanoparticle Formulations. Mol Pharm 2017; 14:1852-1860. [PMID: 28502177 DOI: 10.1021/acs.molpharmaceut.6b01015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While limited drug loading continues to be problematic for chemotherapeutics formulated in nanoparticles, we found that we could take advantage of colloidal drug aggregation to achieve high loading when combined with polymeric excipients. We demonstrate this approach with two drugs, fulvestrant and pentyl-PABC doxazolidine (PPD; a prodrug of doxazolidine, which is a DNA cross-linking anthracycline), and two polymers, polysorbate 80 (UP80) and poly(d,l-lactide-co-2-methyl-2-carboxytrimethylene carbonate)-graft-poly(ethylene glycol) (PLAC-PEG; a custom-synthesized, self-assembling amphiphilic polymer). In both systems, drug-loaded nanoparticles had diameters < 200 nm and were stable for up to two days in buffered saline solution and for up to 24 h in serum-containing media at 37 °C. While colloidal drug aggregates alone are typically unstable in saline and serum-containing media, we attribute the colloid stability observed herein to the polymeric excipients and consequent decreased protein adsorption. We expect this strategy of polymer-stabilized colloidal drug aggregates to be broadly applicable in delivery formulations.
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Affiliation(s)
- Ahil N Ganesh
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , 200 College Street, Toronto, Ontario, Canada M5S 3E5.,Institute of Biomaterials and Biomedical Engineering, University of Toronto , 164 College Street, Toronto, Ontario, Canada M5S 3G9
| | - Jennifer Logie
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , 200 College Street, Toronto, Ontario, Canada M5S 3E5.,Institute of Biomaterials and Biomedical Engineering, University of Toronto , 164 College Street, Toronto, Ontario, Canada M5S 3G9
| | - Christopher K McLaughlin
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , 200 College Street, Toronto, Ontario, Canada M5S 3E5.,Institute of Biomaterials and Biomedical Engineering, University of Toronto , 164 College Street, Toronto, Ontario, Canada M5S 3G9
| | - Benjamin L Barthel
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309-0215, United States
| | - Tad H Koch
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309-0215, United States
| | - Brian K Shoichet
- Department of Pharmaceutical Chemistry & Quantitative Biology Institute, University of California, San Francisco , 1700 Fourth Street, Mail Box 2550, San Francisco, California 94143, United States
| | - Molly S Shoichet
- Department of Chemical Engineering and Applied Chemistry, University of Toronto , 200 College Street, Toronto, Ontario, Canada M5S 3E5.,Institute of Biomaterials and Biomedical Engineering, University of Toronto , 164 College Street, Toronto, Ontario, Canada M5S 3G9.,Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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206
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An approach for chemical stability during melt extrusion of a drug substance with a high melting point. Int J Pharm 2017; 524:55-64. [DOI: 10.1016/j.ijpharm.2017.03.070] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/16/2017] [Accepted: 03/26/2017] [Indexed: 11/18/2022]
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207
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Edwards A, Qi S, Liu F, Brown M, McAuley W. Rationalising polymer selection for supersaturated film forming systems produced by an aerosol spray for the transdermal delivery of methylphenidate. Eur J Pharm Biopharm 2017; 114:164-174. [DOI: 10.1016/j.ejpb.2017.01.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 01/18/2017] [Accepted: 01/18/2017] [Indexed: 11/26/2022]
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208
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Meng F, Liu T, Schneider E, Alzobaidi S, Gil M, Zhang F. Self-Association of Rafoxanide in Aqueous Media and Its Application in Preparing Amorphous Solid Dispersions. Mol Pharm 2017; 14:1790-1799. [DOI: 10.1021/acs.molpharmaceut.7b00068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Fan Meng
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712, United States
| | - Tongzhou Liu
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712, United States
| | - Elizabeth Schneider
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712, United States
| | - Shehab Alzobaidi
- Department
of Chemical Engineering, The University of Texas at Austin, 200
East Dean Keeton Street, Austin, Texas 78712, United States
| | - Marco Gil
- Hovione LLC, 40 Lake Drive, East Windsor, New Jersey 08520, United States
| | - Feng Zhang
- College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, Texas 78712, United States
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209
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DeBoyace K, Wildfong PLD. The Application of Modeling and Prediction to the Formation and Stability of Amorphous Solid Dispersions. J Pharm Sci 2017; 107:57-74. [PMID: 28389266 DOI: 10.1016/j.xphs.2017.03.029] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 03/27/2017] [Indexed: 02/06/2023]
Abstract
Amorphous solid dispersion (ASD) formulation development is frequently difficult owing to the inherent physical instability of the amorphous form, and limited understanding of the physical and chemical interactions that translate to initial dispersion formation and long-term physical stability. Formulation development for ASDs has been historically accomplished through trial and error or experience with extant systems; however, rational selection of appropriate excipients is preferred to reduce time to market and decrease costs associated with development. Current efforts to develop thermodynamic and computational models attempt to rationally direct formulation and show promise. This review compiles and evaluates important methods used to predict ASD formation and physical stability. Recent literature in which these methods are applied is also reviewed, and limitations of each method are discussed.
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Affiliation(s)
- Kevin DeBoyace
- Department of Pharmaceutical Sciences, Duquesne University, 600 Forbes Av, Pittsburgh, Pennsylvania 15282
| | - Peter L D Wildfong
- Department of Pharmaceutical Sciences, Duquesne University, 600 Forbes Av, Pittsburgh, Pennsylvania 15282.
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210
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Wright ME, Parrag IC, Yang M, Santerre JP. Electrospun polyurethane nanofiber scaffolds with ciprofloxacin oligomer versus free ciprofloxacin: Effect on drug release and cell attachment. J Control Release 2017; 250:107-115. [PMID: 28192154 DOI: 10.1016/j.jconrel.2017.02.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/31/2017] [Accepted: 02/07/2017] [Indexed: 02/07/2023]
Abstract
An electrospun degradable polycarbonate urethane (PCNU) nanofiber scaffold loaded with antibiotic was investigated in terms of antibacterial efficacy and cell compatibility for potential use in gingival tissue engineering. Antimicrobial oligomer (AO), a compound which consists of two molecules of ciprofloxacin (CF) covalently bound via hydrolysable linkages to triethylene glycol (TEG), was incorporated via a one-step blend electrospinning process using a single solvent system at 7 and 15% w/w equivalent CF with respect to the PCNU. The oligomeric form of the drug was used to overcome the challenge of drug aggregation and burst release when antibiotics are incorporated as free drug. Electrospinning parameters were optimized to obtain scaffolds with similar alignment and fiber diameter to non-drug loaded fibers. AO that diffused from the fibers was hydrolysed to release CF slowly and in a linear manner over the duration of the study, whereas scaffolds with CF at the same concentration but in free form showed a burst release within 1h with no further release throughout the study duration. Human gingival fibroblast (HGF) adhesion and spreading was dependent on the concentration and form the CF was loaded (AO vs. free CF), which was attributed in part to differences in scaffold surface chemistry. Surface segregation of AO was quantified using surface-resolved X-ray photoelectron spectroscopy (XPS). These findings are encouraging and support further investigation for the use of AO as a means of attenuating the rapid release of drug loaded into nanofibers. The study also demonstrates through quantitative measures that drug additives have the potential to surface-locate without phase separating from the fibers, leading to fast dissolution and differential fibroblast cell attachment.
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Affiliation(s)
- Meghan Ee Wright
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Ian C Parrag
- Interface Biologics Inc., Toronto, Ontario, Canada
| | - Meilin Yang
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - J Paul Santerre
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada; Interface Biologics Inc., Toronto, Ontario, Canada; Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
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211
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Xie T, Taylor LS. Effect of Temperature and Moisture on the Physical Stability of Binary and Ternary Amorphous Solid Dispersions of Celecoxib. J Pharm Sci 2017; 106:100-110. [DOI: 10.1016/j.xphs.2016.06.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 05/26/2016] [Accepted: 06/09/2016] [Indexed: 11/25/2022]
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212
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Patel S, Kou X, Hou H(H, Huang Y(B, Strong JC, Zhang GG, Sun CC. Mechanical Properties and Tableting Behavior of Amorphous Solid Dispersions. J Pharm Sci 2017; 106:217-223. [DOI: 10.1016/j.xphs.2016.08.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 08/02/2016] [Accepted: 08/25/2016] [Indexed: 10/20/2022]
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213
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Xiang TX, Anderson BD. Molecular Dynamics Simulation of Amorphous Hydroxypropylmethylcellulose and Its Mixtures With Felodipine and Water. J Pharm Sci 2016; 106:803-816. [PMID: 27986292 DOI: 10.1016/j.xphs.2016.10.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/19/2016] [Accepted: 10/21/2016] [Indexed: 10/20/2022]
Abstract
Understanding drug-polymer molecular interactions, their miscibility, supersaturation potential, and the effects of water uptake may be invaluable for selecting amorphous polymer dispersions that can maximize the oral bioavailability of poorly water-soluble drugs. Molecular dynamics simulations were performed using a model for hydroxypropylmethylcellulose (HPMC) resembling the substitution patterns found experimentally. HPMC at low and high water contents (0.9%-23.0% wt/wt) and mixtures with a hydrophobic drug, felodipine (FEL), were constructed. Tg values and densities after ∼30 ns aging at 298 K were close to published results. Except for hydrogen bonds (HBs) between the 5-O- and a 3-OH group in a neighboring repeat unit, HPMC oxygen atoms have a low HB probability (p < 0.1) perhaps due to shielding by surrounding substituents. Water molecules tend to be isolated at low water content while clusters were prevalent at ≥10.7% water. The Flory-Huggins FEL-HPMC interaction parameter (-0.20 ± 0.07) predicts complete miscibility at all HPMC compositions, in agreement with experiments. However, HBs between the FEL-N-H and HPMC favoring miscibility are disrupted with increasing water. Apparent diffusion coefficients versus water content were generated for water and FEL and a theory for the non-Einsteinian nature of water diffusion is proposed.
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Affiliation(s)
- Tian-Xiang Xiang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536
| | - Bradley D Anderson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536.
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214
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Lehmkemper K, Kyeremateng SO, Heinzerling O, Degenhardt M, Sadowski G. Long-Term Physical Stability of PVP- and PVPVA-Amorphous Solid Dispersions. Mol Pharm 2016; 14:157-171. [DOI: 10.1021/acs.molpharmaceut.6b00763] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kristin Lehmkemper
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
- TU Dortmund, Department of Biochemical and
Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Samuel O. Kyeremateng
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Oliver Heinzerling
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Matthias Degenhardt
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Gabriele Sadowski
- TU Dortmund, Department of Biochemical and
Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
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215
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Physicochemical properties of direct compression tablets with spray dried and ball milled solid dispersions of tadalafil in PVP-VA. Eur J Pharm Biopharm 2016; 109:14-23. [DOI: 10.1016/j.ejpb.2016.09.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 05/17/2016] [Accepted: 09/18/2016] [Indexed: 01/07/2023]
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216
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Hengsawas Surasarang S, Keen JM, Huang S, Zhang F, McGinity JW, Williams RO. Hot melt extrusion versus spray drying: hot melt extrusion degrades albendazole. Drug Dev Ind Pharm 2016; 43:797-811. [PMID: 27616147 DOI: 10.1080/03639045.2016.1220577] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The purpose of this study was to enhance the dissolution properties of albendazole (ABZ) by the use of amorphous solid dispersions. Phase diagrams of ABZ-polymer binary mixtures generated from Flory-Huggins theory were used to assess miscibility and processability. Forced degradation studies showed that ABZ degraded upon exposure to hydrogen peroxide and 1 N NaOH at 80 °C for 5 min, and the degradants were albendazole sulfoxide (ABZSX), and ABZ impurity A, respectively. ABZ was chemically stable following exposure to 1 N HCl at 80 °C for one hour. Thermal degradation profiles show that ABZ, with and without Kollidon® VA 64, degraded at 180 °C and 140 °C, respectively, which indicated that ABZ could likely be processed by thermal processing. Following hot melt extrusion, ABZ degraded up to 97.4%, while the amorphous ABZ solid dispersion was successfully prepared by spray drying. Spray-dried ABZ formulations using various types of acids (methanesulfonic acid, sulfuric acid and hydrochloric acid) and polymers (Kollidon® VA 64, Soluplus® and Eudragit® E PO) were studied. The spray-dried ABZ with methanesulfonic acid and Kollidon® VA 64 substantially improved non-sink dissolution in acidic media as compared to bulk ABZ (8-fold), physical mixture of ABZ:Kollidon® VA 64 (5.6-fold) and ABZ mesylate salt (1.6-fold). No degradation was observed in the spray-dried product for up to six months and less than 5% after one-year storage. In conclusion, amorphous ABZ solid dispersions in combination with an acid and polymer can be prepared by spray drying to enhance dissolution and shelf-stability, whereas those made by melt extrusion are degraded.
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Affiliation(s)
| | | | - Siyuan Huang
- a Division of Pharmaceutics , The University of Texas at Austin , Austin , TX , USA
| | - Feng Zhang
- a Division of Pharmaceutics , The University of Texas at Austin , Austin , TX , USA
| | - James W McGinity
- a Division of Pharmaceutics , The University of Texas at Austin , Austin , TX , USA
| | - Robert O Williams
- a Division of Pharmaceutics , The University of Texas at Austin , Austin , TX , USA
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217
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Bochmann ES, Neumann D, Gryczke A, Wagner KG. Micro-scale prediction method for API-solubility in polymeric matrices and process model for forming amorphous solid dispersion by hot-melt extrusion. Eur J Pharm Biopharm 2016; 107:40-8. [DOI: 10.1016/j.ejpb.2016.06.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/20/2016] [Accepted: 06/21/2016] [Indexed: 01/25/2023]
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218
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Sanchez-Rexach E, Martínez de Arenaza I, Sarasua JR, Meaurio E. Antimicrobial poly(ε-caprolactone)/thymol blends: Phase behavior, interactions and drug release kinetics. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.08.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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219
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Altamimi MA, Neau SH. Investigation of the in vitro performance difference of drug-Soluplus® and drug-PEG 6000 dispersions when prepared using spray drying or lyophilization. Saudi Pharm J 2016; 25:419-439. [PMID: 28344498 PMCID: PMC5357108 DOI: 10.1016/j.jsps.2016.09.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 09/25/2016] [Indexed: 11/29/2022] Open
Abstract
Purpose: To evaluate the physicochemical and in vitro characteristics of solid dispersions using BCS II model drugs with Soluplus® and one of its component homopolymers, PEG 6000. Methods: Nifedipine (NIF) and sulfamethoxazole (SMX) of 99.3% and 99.5% purity, respectively, were selected as BCS II model drugs, such that an improved dissolution rate and concentration in the gastrointestinal tract should increase oral bioavailability. Soluplus® is an amorphous, tri-block, graft co-polymer with polyvinyl caprolactam, polyvinyl acetate, and polyethylene glycol (PCL:PVAc:PEG6000) in the ratio 57:30:13. PEG 6000 (BASF) is a waxy material with melting point of about 60 °C. Solid dispersions were prepared using lyophilization or spray drying techniques. Dissolution study, crystallinity content, and analysis for new chemical bond formation have been used to evaluate the dispersed materials. Results: Although each polymer improved the drug dissolution rate, dissolution from Soluplus® was slower. Enhanced dissolution rates were observed with NIF solid dispersions, but the dissolution profiles were quite different due to the selected technique, polymer, and dissolution medium. For SMX, there was similarity across the dissolution profiles despite the medium, polymer, or applied technique. Each polymer was able to maintain an elevated drug concentration over the three hour duration of the dissolution profile, i.e., supersaturation was supported by the polymer. DSC thermograms revealed no melting endotherm, suggesting that the drug is amorphous or molecularly dispersed. Conclusion: NIF and SMX solid dispersions were successfully prepared by spray drying and lyophilization using Soluplus® or PEG 6000. Each polymer enhanced the drug dissolution rate; NIF dissolution rate was improved to a greater extent. Dispersions with PEG 6000 had a faster dissolution rate due to its hydrophilic nature. DSC analysis showed that no crystalline material exists in the dispersions.
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Affiliation(s)
- Mohammad A Altamimi
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, 600 S. 43rd Street, Philadelphia, PA 19104, United States; Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Steven H Neau
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, 600 S. 43rd Street, Philadelphia, PA 19104, United States
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220
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Bohr A, Water JJ, Wang Y, Arnfast L, Beck-Broichsitter M. Potential of surface-eroding poly(ethylene carbonate) for drug delivery to macrophages. Int J Pharm 2016; 511:814-20. [DOI: 10.1016/j.ijpharm.2016.07.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 01/06/2023]
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221
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Jog R, Gokhale R, Burgess DJ. Solid state drug-polymer miscibility studies using the model drug ABT-102. Int J Pharm 2016; 509:285-295. [DOI: 10.1016/j.ijpharm.2016.05.068] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/16/2016] [Accepted: 05/31/2016] [Indexed: 11/28/2022]
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222
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Fridgeirsdottir GA, Harris R, Fischer PM, Roberts CJ. Support Tools in Formulation Development for Poorly Soluble Drugs. J Pharm Sci 2016; 105:2260-9. [PMID: 27368122 DOI: 10.1016/j.xphs.2016.05.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 05/20/2016] [Accepted: 05/25/2016] [Indexed: 11/19/2022]
Abstract
The need for solubility enhancement through formulation is a well-known but still problematic issue because of the numbers of poorly water-soluble drugs in development. There are several possible routes that can be taken to increase the bioavailability of drugs intended for immediate-release oral formulation. The best formulation strategy for any given drug will depend on numerous factors, including required dose, shelf life, manufacturability, and the properties of the active pharmaceutical ingredient (API). Choosing an optimal formulation and manufacturing route for a new API is therefore not a straightforward process. Currently, there are several approaches that are used in the pharmaceutical industry to select the best formulation strategy. These differ in complexity and efficiency, but most try to predict which route will best suit the API based on selected molecular parameters such as molecular weight, lipophilicity (logP), and solubility. These methods range from using no tools, trial and error methods through a variety of complex tools from small in vitro or in vivo experiments or high throughput screening, guidance maps, and decision trees to the most complex methods based on computational modelling tools. This review aims to list available support tools and explain how they are used.
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Affiliation(s)
| | | | - Peter M Fischer
- School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Clive J Roberts
- School of Pharmacy, University of Nottingham, Nottingham, UK.
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223
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Korhonen O, Pajula K, Laitinen R. Rational excipient selection for co-amorphous formulations. Expert Opin Drug Deliv 2016; 14:551-569. [DOI: 10.1080/17425247.2016.1198770] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ossi Korhonen
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Katja Pajula
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Riikka Laitinen
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
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224
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Van Duong T, Van den Mooter G. The role of the carrier in the formulation of pharmaceutical solid dispersions. Part II: amorphous carriers. Expert Opin Drug Deliv 2016; 13:1681-1694. [DOI: 10.1080/17425247.2016.1198769] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tu Van Duong
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KU Leuven – University of Leuven, Leuven, Belgium
- Department of Pharmaceutics, Hanoi University of Pharmacy, Ha Noi, Vietnam
| | - Guy Van den Mooter
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KU Leuven – University of Leuven, Leuven, Belgium
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225
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Taylor LS, Zhang GG. Physical chemistry of supersaturated solutions and implications for oral absorption. Adv Drug Deliv Rev 2016; 101:122-142. [PMID: 27013254 DOI: 10.1016/j.addr.2016.03.006] [Citation(s) in RCA: 254] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 10/22/2022]
Abstract
Amorphous solid dispersion (ASD) formulations are widely used for delivery of poorly soluble drugs for dissolution enhancement and bioavailability improvement. When administered, ASDs often exhibit fast dissolution to yield supersaturated solutions. The physical chemistry of these supersaturated solutions is not well understood. This review will discuss the concepts of solubility, supersaturation, and the connection to membrane transport rate. Liquid-liquid phase separation (LLPS), which occurs when the amorphous solubility is exceeded, leading to solutions with interesting properties is extensively discussed as a phenomenon that is relevant to all enabling formulations. The multiple physical processes occurring during dissolution of the ASD and during oral absorption are analyzed. The beneficial reservoir effect of a system that has undergone LLPS is demonstrated, both experimentally and conceptually. It is believed that formulations that rapidly supersaturate and subsequently undergo LLPS, with maintenance of the supersaturation at this maximum value throughout the absorption process, i.e. those that exhibit "spring and plateau" behavior, will give superior performance in terms of absorption.
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226
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Mehta M, McKenna GB, Suryanarayanan R. Molecular mobility in glassy dispersions. J Chem Phys 2016; 144:204506. [DOI: 10.1063/1.4950768] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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227
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Dengale SJ, Grohganz H, Rades T, Löbmann K. Recent advances in co-amorphous drug formulations. Adv Drug Deliv Rev 2016; 100:116-25. [PMID: 26805787 DOI: 10.1016/j.addr.2015.12.009] [Citation(s) in RCA: 297] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 12/09/2015] [Indexed: 11/19/2022]
Abstract
Co-amorphous drug delivery systems have recently gained considerable interest in the pharmaceutical field because of their potential to improve oral bioavailability of poorly water-soluble drugs through drug dissolution enhancement as a result of the amorphous nature of the material. A co-amorphous system is characterized by the use of only low molecular weight components that are mixed into a homogeneous single-phase co-amorphous blend. The use of only low molecular weight co-formers makes this approach very attractive, as the amount of amorphous stabilizer can be significantly reduced compared with other amorphous stabilization techniques. Because of this, several research groups started to investigate the co-amorphous formulation approach, resulting in an increasing amount of scientific publications over the last few years. This study provides an overview of the co-amorphous field and its recent findings. In particular, we investigate co-amorphous formulations from the viewpoint of solid dispersions, describe their formation and mechanism of stabilization, study their impact on dissolution and in vivo performance and briefly outline the future potentials.
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Affiliation(s)
- Swapnil Jayant Dengale
- Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, Karnataka, India
| | - Holger Grohganz
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark.
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
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228
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Feng X, Vo A, Patil H, Tiwari RV, Alshetaili AS, Pimparade MB, Repka MA. The effects of polymer carrier, hot melt extrusion process and downstream processing parameters on the moisture sorption properties of amorphous solid dispersions. J Pharm Pharmacol 2016; 68:692-704. [PMID: 26589107 PMCID: PMC5612492 DOI: 10.1111/jphp.12488] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 09/12/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the effect of polymer carrier, hot melt extrusion and downstream processing parameters on the water uptake properties of amorphous solid dispersions. METHODS Three polymers and a model drug were used to prepare amorphous solid dispersions utilizing the hot melt extrusion technology. The sorption-desorption isotherms of solid dispersions and their physical mixtures were measured by the dynamic vapour sorption system, and the effects of polymer hydrophobicity, hygroscopicity, molecular weight and the hot melt extrusion process were investigated. Fourier transform infrared (FTIR) imaging was performed to understand the phase separation driven by the moisture. KEY FINDINGS Solid dispersions with polymeric carriers with lower hydrophilicity, hygroscopicity and higher molecular weight could sorb less moisture under the high relative humidity (RH) conditions. The water uptake ability of polymer-drug solid dispersion systems were decreased compared with the physical mixture after hot melt extrusion, which might be due to the decreased surface area and porosity. The FTIR imaging indicated that the homogeneity of the drug molecularly dispersed within the polymer matrix was changed after exposure to high RH. CONCLUSION Understanding the effect of formulation and processing on the moisture sorption properties of solid dispersions is essential for the development of drug products with desired physical and chemical stability.
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Affiliation(s)
- Xin Feng
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Anh Vo
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Hemlata Patil
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Roshan V. Tiwari
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Abdullah S. Alshetaili
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Manjeet B. Pimparade
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Michael A. Repka
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
- Pii Center for Pharmaceutical Technology, The University of Mississippi, University, MS 38677, USA
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229
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230
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Bansal K, Baghel US, Thakral S. Construction and Validation of Binary Phase Diagram for Amorphous Solid Dispersion Using Flory-Huggins Theory. AAPS PharmSciTech 2016; 17:318-27. [PMID: 26092302 PMCID: PMC4984891 DOI: 10.1208/s12249-015-0343-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 05/27/2015] [Indexed: 11/30/2022] Open
Abstract
Drug-polymer miscibility is one of the fundamental prerequisite for the successful design and development of amorphous solid dispersion formulation. The purpose of the present work is to provide an example of the theoretical estimation of drug-polymer miscibility and solubility on the basis of Flory-Huggins (F-H) theory and experimental validation of the phase diagram. The F-H interaction parameter, χ d-p, of model system, aceclofenac and Soluplus, was estimated by two methods: by melting point depression of drug in presence of different polymer fractions and by Hildebrand and Scott solubility parameter calculations. The simplified relationship between the F-H interaction parameter and temperature was established. This enabled us to generate free energy of mixing (ΔG mix) curves for varying drug-polymer compositions at different temperatures and finally the spinodal curve. The predicted behavior of the binary system was evaluated through X-ray diffraction, differential scanning calorimetry, and in vitro dissolution studies. The results suggest possibility of employing interaction parameter as preliminary tool for the estimation of drug-polymer miscibility.
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Affiliation(s)
- Krishna Bansal
- GVM College of Pharmacy, Sonipat, Haryana, 131001, India
| | | | - Seema Thakral
- GVM College of Pharmacy, Sonipat, Haryana, 131001, India.
- College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, 55455, USA.
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231
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Penumetcha SS, Gutta LN, Dhanala H, Yamili S, Challa S, Rudraraju S, Rudraraju S, Rudraraju V. Hot melt extruded Aprepitant-Soluplus solid dispersion: preformulation considerations, stability and in vitro study. Drug Dev Ind Pharm 2016; 42:1609-20. [PMID: 26925514 DOI: 10.3109/03639045.2016.1160105] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Solubility limitation of BCS class II drugs pose challenges to in vitro release. OBJECTIVE To investigate the miscibility of Aprepitant (APR) and Soluplus(®) (SOL) for hot melt extrusion (HME) viability and improved in vitro release of APR. METHODS Solubility parameters of APR and SOL from group contribution methods were evaluated. Heat-cool-heat differential scanning calorimetry (DSC) scans were assessed for determining the glass forming ability (GFA) and glass stability (GS) of APR. An optimum HME temperature was selected based on melting point depression in physical mixtures. Moisture sorption isotherms were collected using a dynamic vapor sorption (DVS) analyzer at 25 °C. A 1:4 APR:SOL physical mixture was extruded in a co-rotating 12 mm twin screw extruder and in vitro release was assessed in fasted state simulated intestinal fluid (FaSSIF) with 0.25% SLS. Extrudates were analyzed using TGA, DSC, XRD and FTIR. RESULTS APR was classified as a class II glass former. APR and SOL had composition dependent miscibility based on Gibb's free energy of mixing. Extrudate prepared using HME had an amorphous as well as a crystalline phase that showed good stability in accelerated stability conditions. Smaller particle size extrudates exhibited a higher % moisture uptake and in vitro release compared to larger particle size extrudates. Enhanced in vitro release of APR from extrudates was attributed to amorphization of APR, solubilization as well as crystal growth inhibition effect of SOL due to H-bond formation with APR. CONCLUSIONS A solid dispersion of APR with improved in vitro release was successfully developed using HME technology.
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Affiliation(s)
| | | | - Harish Dhanala
- a Aizant Drug Research Solutions Pvt. Ltd. , Hyderabad , India
| | | | - Swetha Challa
- a Aizant Drug Research Solutions Pvt. Ltd. , Hyderabad , India
| | - Sneha Rudraraju
- a Aizant Drug Research Solutions Pvt. Ltd. , Hyderabad , India ;,b Biomedical Engineering Department, University of Texas at Dallas , Richardson , TX , USA
| | | | - Varma Rudraraju
- a Aizant Drug Research Solutions Pvt. Ltd. , Hyderabad , India
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232
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Netchacovitch L, Thiry J, De Bleye C, Dumont E, Dispas A, Hubert C, Krier F, Sacré PY, Evrard B, Hubert P, Ziemons E. A simple calibration approach based on film-casting for confocal Raman microscopy to support the development of a hot-melt extrusion process. Talanta 2016; 154:392-9. [PMID: 27154691 DOI: 10.1016/j.talanta.2016.03.080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/21/2016] [Accepted: 03/25/2016] [Indexed: 11/28/2022]
Abstract
When developing a new formulation, the development, calibration and validation steps of analytical methods based on vibrational spectroscopy are time-consuming. For each new formulation, real samples must be produced and a "reference method" must be used in order to determine the Active Pharmaceutical Ingredient (API) content of each sample. To circumvent this issue, the paper presents a simple approach based on the film-casting technique used as a calibration tool in the framework of hot-melt extrusion process. Confocal Raman microscopic method was successfully validated for the determination of itraconazole content in film-casting samples. Then, hot-melt extrusion was carried out to produce real samples in order to confront the results obtained with confocal Raman microscopy and Ultra High Performance Liquid Chromatography (UHPLC). The agreement between both methods was demonstrated using a comparison study based on the Bland and Altman's plot.
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Affiliation(s)
- L Netchacovitch
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium.
| | - J Thiry
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - C De Bleye
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - E Dumont
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - A Dispas
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - C Hubert
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - F Krier
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - P-Y Sacré
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - B Evrard
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Pharmaceutical Technology and Biopharmacy, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - Ph Hubert
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
| | - E Ziemons
- University of Liege (ULg), CIRM, Department of Pharmacy, Laboratory of Analytical Chemistry, CHU, Quartier Hôpital, Avenue Hippocrate 15, B-4000 Liege, Belgium
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233
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A Promising New Method to Estimate Drug-Polymer Solubility at Room Temperature. J Pharm Sci 2016; 105:2621-2624. [PMID: 27012222 DOI: 10.1016/j.xphs.2016.02.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/04/2016] [Accepted: 02/18/2016] [Indexed: 11/21/2022]
Abstract
The established methods to predict drug-polymer solubility at room temperature either rely on extrapolation over a long temperature range or are limited by the availability of a liquid analogue of the polymer. To overcome these issues, this work investigated a new methodology where the drug-polymer solubility is estimated from the solubility of the drug in a solution of the polymer at room temperature using the shake-flask method. Thus, the new polymer in solution method does not rely on temperature extrapolations and only requires the polymer and a solvent, in which the polymer is soluble, that does not affect the molecular structure of the drug and polymer relative to that in the solid state. Consequently, as this method has the potential to provide fast and precise estimates of drug-polymer solubility at room temperature, we encourage the scientific community to further investigate this principle both fundamentally and practically.
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234
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Mehta M, Kothari K, Ragoonanan V, Suryanarayanan R. Effect of Water on Molecular Mobility and Physical Stability of Amorphous Pharmaceuticals. Mol Pharm 2016; 13:1339-46. [DOI: 10.1021/acs.molpharmaceut.5b00950] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mehak Mehta
- Department
of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Khushboo Kothari
- Department
of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Vishard Ragoonanan
- Department
of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Raj Suryanarayanan
- Department
of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
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235
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Alhalaweh A, Bergström CAS, Taylor LS. Compromised in vitro dissolution and membrane transport of multidrug amorphous formulations. J Control Release 2016; 229:172-182. [PMID: 27006280 DOI: 10.1016/j.jconrel.2016.03.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 03/16/2016] [Indexed: 10/22/2022]
Abstract
Herein, the thermodynamic properties of solutions evolving from the non-sink dissolution of amorphous solid dispersions (ASDs) containing two or more drugs have been evaluated, focusing on the maximum achievable supersaturation and tendency of the system to undergo liquid-liquid phase separation (LLPS). Ritonavir (RTV) and atazanavir (ATV) were co-formulated with polyvinylpyrrolidone to produce ASDs with different molar ratios of each drug, and the dissolution profile of each drug was studied under non-sink conditions. The phase behavior of the supersaturated solutions generated by ASD dissolution was compared to that of supersaturated solutions generated by antisolvent addition. Dissolution of an ASD containing RTV, ATV and lopinavir (LPV) was also investigated. A thermodynamic model was used to predict the maximum achievable supersaturation for ASDs containing two and three drugs. In addition, a transport study with Caco-2 cells was conducted to evaluate the impact of co-addition of drugs on membrane transport. It was found that the formulation containing a 1:1 molar ratio of RTV and ATV achieved only 50% of the supersaturation attained by dissolution of the single drug systems. The maximum achievable concentration of ATV decreased linearly as the mole fraction of ATV in the formulation decreased and a similar trend was observed for RTV. For the dispersion containing a 1:1:1 molar ratio of RTV, ATV and LPV, the maximum concentration of each drug was only one third of that achieved for the single drug formulations. The decrease in the achievable supersaturation was well-predicted by the thermodynamic model for both the binary and ternary drug combinations. These observations can be explained by a decrease in the concentration at which the drugs undergo LLPS in the presence of other miscible drugs, thereby reducing the maximum achievable supersaturation of each drug. The reduced free drug concentration was reflected by a decreased flux across Caco-2 cells for the drug combinations compared to drug alone. This study sheds light on the complex dissolution and solution phase behavior of multicomponent amorphous dosage forms, in particular those containing poorly water soluble drugs, which may undergo supersaturation in vivo.
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Affiliation(s)
- Amjad Alhalaweh
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, 47907, United States
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala University, Uppsala Biomedical Centre, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, IN, 47907, United States.
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236
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Li N, Taylor LS. Nanoscale Infrared, Thermal, and Mechanical Characterization of Telaprevir-Polymer Miscibility in Amorphous Solid Dispersions Prepared by Solvent Evaporation. Mol Pharm 2016; 13:1123-36. [PMID: 26859046 DOI: 10.1021/acs.molpharmaceut.5b00925] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Miscibility is of great interest for pharmaceutical systems, in particular, for amorphous solid dispersions, as phase separation can lead to a higher tendency to crystallize, resulting in a loss in solubility, decreased dissolution rate, and compromised bioavailability. The purpose of this study was to investigate the miscibility behavior of a model poorly water-soluble drug, telaprevir (TPV), with three different polymers using atomic force microscopy-based infrared, thermal, and mechanical analysis. Standard atomic force microscopy (AFM) imaging together with nanoscale infrared spectroscopy (AFM-IR), nanoscale thermal analysis (nanoTA), and Lorentz contact resonance (LCR) measurements were used to evaluate the miscibility behavior of TPV with three polymers, hydroxypropyl methylcellulose (HPMC), HPMC acetate succinate (HPMCAS), and poly(vinylpyrrolidone-co-vinyl acetate) (PVPVA), at different drug to polymer ratios. Phase separation was observed with HPMC and PVPVA at drug loadings above 10%. For HPMCAS, a smaller miscibility gap was observed, with phase separation being observed at drug loadings higher than ∼30-40%. The domain size of phase-separated regions varied from below 50 nm to a few hundred nanometers. Localized infrared spectra, nano-TA measurements, images from AFM-based IR, and LCR measurements showed clear contrast between the continuous and discrete domains for these phase-separated systems, whereby the discrete domains were drug-rich. Fluorescence microscopy provided additional evidence for phase separation. These methods appear to be promising to evaluate miscibility in drug-polymer systems with similar Tgs and submicron domain sizes. Furthermore, such findings are of obvious importance in the context of contributing to a mechanistic understanding of amorphous solid dispersion phase behavior.
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Affiliation(s)
- Na Li
- Department of Industrial and Physical Pharmacy, Purdue University , 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, Purdue University , 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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237
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Lu J, Obara S, Ioannidis N, Suwardie J, Gogos C, Kikuchi S. Understanding the Processing Window of Hypromellose Acetate Succinate for Hot-Melt Extrusion, Part I: Polymer Characterization and Hot-Melt Extrusion. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21652] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jiannan Lu
- Pharmaceutical Application Laboratory; Shin-Etsu Chemical Co., Ltd; Totowa NJ 07512
| | - Sakae Obara
- Pharmaceutical Application Laboratory; Shin-Etsu Chemical Co., Ltd; Totowa NJ 07512
| | - Nicolas Ioannidis
- Polymer Processing Institute; New Jersey Institute of Technology; Newark NJ 07102
| | - John Suwardie
- Polymer Processing Institute; New Jersey Institute of Technology; Newark NJ 07102
| | - Costas Gogos
- Polymer Processing Institute; New Jersey Institute of Technology; Newark NJ 07102
| | - Shingo Kikuchi
- Cellulose Technical Support Center; YBP Technical Center; Shin-Etsu Chemical Co., Ltd; Godo-cho, Hodogaya-ku, Yokohama Kanagawa 240-0005 Japan
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238
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Piccinni P, Tian Y, McNaughton A, Fraser J, Brown S, Jones DS, Li S, Andrews GP. Solubility parameter-based screening methods for early-stage formulation development of itraconazole amorphous solid dispersions. J Pharm Pharmacol 2016; 68:705-20. [PMID: 26864155 DOI: 10.1111/jphp.12491] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/20/2015] [Indexed: 11/30/2022]
Abstract
Abstract
Objectives
This article uses conventional and newly extended solubility parameter (δ) methods to identify polymeric materials capable of forming amorphous dispersions with itraconazole (itz).
Methods
Combinations of itz and Soluplus, Eudragit E PO (EPO), Kollidon 17PF (17PF) or Kollidon VA64 (VA64) were prepared as amorphous solid dispersions using quench cooling and hot melt extrusion. Storage stability was evaluated under a range of conditions using differential scanning calorimetry and powder X-ray diffraction.
Key findings
The rank order of itz miscibility with polymers using both conventional and novel δ-based approaches was 17PF > VA64 > Soluplus > EPO, and the application of the Flory–Huggins lattice model to itz–excipient binary systems corroborated the findings. The solid-state characterisation analyses of the formulations manufactured by melt extrusion correlated well with pre-formulation screening. Long-term storage studies showed that the physical stability of 17PF/vitamin E TPGS–itz was poor compared with Soluplus and VA64 formulations, and for EPO/itz systems variation in stability may be observed depending on the preparation method.
Conclusion
Results have demonstrated that although δ-based screening may be useful in predicting the initial state of amorphous solid dispersions, assessment of the physical behaviour of the formulations at relevant temperatures may be more appropriate for the successful development of commercially acceptable amorphous drug products.
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Affiliation(s)
- Piero Piccinni
- Pharmaceutical Engineering Group, Queen's University, Belfast, UK
- Encap Drug Delivery, West Lothian, UK
| | - Yiwei Tian
- Pharmaceutical Engineering Group, Queen's University, Belfast, UK
| | | | | | | | - David S Jones
- Pharmaceutical Engineering Group, Queen's University, Belfast, UK
| | - Shu Li
- Pharmaceutical Engineering Group, Queen's University, Belfast, UK
| | - Gavin P Andrews
- Pharmaceutical Engineering Group, Queen's University, Belfast, UK
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239
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Xie T, Taylor LS. Improved Release of Celecoxib from High Drug Loading Amorphous Solid Dispersions Formulated with Polyacrylic Acid and Cellulose Derivatives. Mol Pharm 2016; 13:873-84. [PMID: 26791934 DOI: 10.1021/acs.molpharmaceut.5b00798] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tian Xie
- Department of Industrial
and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Lynne S. Taylor
- Department of Industrial
and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
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240
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Huang S, O’Donnell KP, Keen JM, Rickard MA, McGinity JW, Williams RO. A New Extrudable Form of Hypromellose: AFFINISOL™ HPMC HME. AAPS PharmSciTech 2016; 17:106-19. [PMID: 26335416 DOI: 10.1208/s12249-015-0395-9] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/08/2015] [Indexed: 11/30/2022] Open
Abstract
Hypromellose is a hydrophilic polymer widely used in immediate- and modified-release oral pharmaceutical dosage forms. However, currently available grades of hypromellose are difficult, if not impossible, to process by hot melt extrusion (HME) because of their high glass transition temperature, high melt viscosity, and low degradation temperature. To overcome these challenges, a modified grade of hypromellose, AFFINISOL™ HPMC HME, was recently introduced. It has a significantly lower glass transition temperature and melt viscosity as compared to other available grades of hypromellose. The objective of this paper is to assess the extrudability and performance of AFFINISOL™ HPMC HME (100LV and 4M) as compared to other widely used polymers in HME, including HPMC 2910 100cP (the currently available hypromellose), Soluplus®, Kollidon® VA 64, and EUDRAGIT® E PO. Formulations containing polymer and carbamazepine (CBZ) were extruded on a co-rotating 16-mm twin-screw extruder, and the effect of temperature, screw speed, and feed rate was investigated. The performance of the solid dispersions was evaluated based on Flory-Huggins modeling and characterized by differential scanning calorimetry (DSC), X-ray powder diffraction (XRD), Raman spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and dissolution. All formulations extruded well except for HPMC 2910 100cP, which resulted in over-torqueing the extruder (machine overloading because the motor cannot provide efficient energy to rotate the shaft). Among the HME extrudates, only the EUDRAGIT® E PO formulation was crystalline as confirmed by DSC, XRD, and Raman, which agreed with predictions from Flory-Huggins modeling. Dissolution testing was conducted under both sink and non-sink conditions. Sink dissolution testing in neutral media revealed that amorphous CBZ in the HME extrudates completely dissolved within 15 min, which was much more rapid than the time for complete dissolution of bulk CBZ (60 min) and EUDRAGIT® E PO solid dispersion (more than 6 h). Non-sink dissolution in acidic media testing revealed that only CBZ contained in the AFFINISOL™ HPMC HME, and EUDRAGIT® E PO solid dispersions rapidly supersaturated after 15 min, reaching a twofold drug concentration compared to the CBZ equilibrium solubility. In summary, AFFINISOL™ HPMC HME 100LV and AFFINISOL™ HPMC HME 4M are useful in the pharmaceutical HME process to increase wetting and dissolution properties of poorly water-soluble drugs like CBZ.
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241
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LaFountaine JS, McGinity JW, Williams RO. Challenges and Strategies in Thermal Processing of Amorphous Solid Dispersions: A Review. AAPS PharmSciTech 2016; 17:43-55. [PMID: 26307759 DOI: 10.1208/s12249-015-0393-y] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/08/2015] [Indexed: 11/30/2022] Open
Abstract
Thermal processing of amorphous solid dispersions continues to gain interest in the pharmaceutical industry, as evident by several recently approved commercial products. Still, a number of pharmaceutical polymer carriers exhibit thermal or viscoelastic limitations in thermal processing, especially at smaller scales. Additionally, active pharmaceutical ingredients with high melting points and/or that are thermally labile present their own specific challenges. This review will outline a number of formulation and process-driven strategies to enable thermal processing of challenging compositions. These include the use of traditional plasticizers and surfactants, temporary plasticizers utilizing sub- or supercritical carbon dioxide, designer polymers tailored for hot-melt extrusion processing, and KinetiSol® Dispersing technology. Recent case studies of each strategy will be described along with potential benefits and limitations.
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242
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Xu Y, Koo D, Gerstein EA, Kim CS. Multi-scale modeling of polymer–drug interactions and their impact on the structural evolutions in PLGA-tetracycline films. POLYMER 2016. [DOI: 10.1016/j.polymer.2015.12.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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243
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Li S, Tian Y, Jones DS, Andrews GP. Optimising Drug Solubilisation in Amorphous Polymer Dispersions: Rational Selection of Hot-melt Extrusion Processing Parameters. AAPS PharmSciTech 2016; 17:200-13. [PMID: 26729536 DOI: 10.1208/s12249-015-0450-6] [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] [Received: 08/04/2015] [Accepted: 10/21/2015] [Indexed: 11/30/2022] Open
Abstract
The aim of this article was to construct a T-ϕ phase diagram for a model drug (FD) and amorphous polymer (Eudragit® EPO) and to use this information to understand the impact of how temperature-composition coordinates influenced the final properties of the extrudate. Defining process boundaries and understanding drug solubility in polymeric carriers is of utmost importance and will help in the successful manufacture of new delivery platforms for BCS class II drugs. Physically mixed felodipine (FD)-Eudragit(®) EPO (EPO) binary mixtures with pre-determined weight fractions were analysed using DSC to measure the endset of melting and glass transition temperature. Extrudates of 10 wt% FD-EPO were processed using temperatures (110°C, 126°C, 140°C and 150°C) selected from the temperature-composition (T-ϕ) phase diagrams and processing screw speed of 20, 100 and 200rpm. Extrudates were characterised using powder X-ray diffraction (PXRD), optical, polarised light and Raman microscopy. To ensure formation of a binary amorphous drug dispersion (ADD) at a specific composition, HME processing temperatures should at least be equal to, or exceed, the corresponding temperature value on the liquid-solid curve in a F-H T-ϕ phase diagram. If extruded between the spinodal and liquid-solid curve, the lack of thermodynamic forces to attain complete drug amorphisation may be compensated for through the use of an increased screw speed. Constructing F-H T-ϕ phase diagrams are valuable not only in the understanding drug-polymer miscibility behaviour but also in rationalising the selection of important processing parameters for HME to ensure miscibility of drug and polymer.
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244
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Rask MB, Knopp MM, Olesen NE, Holm R, Rades T. Influence of PVP/VA copolymer composition on drug-polymer solubility. Eur J Pharm Sci 2016; 85:10-7. [PMID: 26826280 DOI: 10.1016/j.ejps.2016.01.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/22/2015] [Accepted: 01/26/2016] [Indexed: 10/22/2022]
Abstract
In this study, the influence of copolymer composition on drug-polymer solubility was investigated. The solubility of the model drug celecoxib (CCX) in various polyvinylpyrrolidone/vinyl acetate (PVP/VA) copolymer compositions (70/30, 60/40, 50/50 and 30/70 w/w) and the pure homopolymers polyvinylpyrrolidone (PVP) and polyvinyl acetate (PVA) was predicted at 25 °C using a thermal analysis method based on the recrystallization of a supersaturated amorphous dispersion (recrystallization method). These solubilities were compared with a prediction based on the solubility of CCX in the liquid monomeric precursors of PVP/VA, N-vinylpyrrolidone (NVP) and vinyl acetate (VA), using the Flory-Huggins lattice theory (liquid monomer solubility approach). The solubilities predicted from the liquid monomer solubility approach increased linearly with increasing VP/VA ratio from 0.03-0.60 w/w. Even though the solubilities predicted from the recrystallization method also increased with increasing VP/VA ratio from 0.02-0.40 w/w, the predicted solubility seemed to approach a plateau at high VP/VA ratios. Increasing positive deviations from the Gordon-Taylor equation with increasing VP/VA ratio indicated strong interactions between CCX and the VP repeat unit, which was in accordance with the relatively high solubilities predicted using both methods. As the solubility plateau may be a consequence of steric hindrance caused by the size differences between CCX and the VP repeat units, it is likely that a CCX molecule interacting with a VP repeat unit hinders another CCX molecule from binding to the neighboring repeat units in the polymer chain. Therefore, it is possible that replacing these neighboring hygroscopic VP repeat units with hydrophobic VA repeat units, could increase the physical stability of an amorphous solid dispersion without compromising the drug-polymer solubility. This knowledge could be used advantageously in future development of amorphous drug delivery systems as copolymers could be customized to provide optimal drug-polymer solubility and physical stability.
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Affiliation(s)
- Malte Bille Rask
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, DK-2500 Valby, Denmark; Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Matthias Manne Knopp
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, DK-2500 Valby, Denmark; Institute of Pharmacy and Biochemistry, Johannes Gutenberg University of Mainz, D-55128 Mainz, Germany
| | - Niels Erik Olesen
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, DK-2500 Valby, Denmark
| | - René Holm
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, DK-2500 Valby, Denmark; Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark.
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
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245
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Aho J, Edinger M, Botker J, Baldursdottir S, Rantanen J. Oscillatory Shear Rheology in Examining the Drug-Polymer Interactions Relevant in Hot Melt Extrusion. J Pharm Sci 2016; 105:160-7. [PMID: 26852851 DOI: 10.1016/j.xphs.2015.11.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/04/2015] [Accepted: 11/10/2015] [Indexed: 11/20/2022]
Abstract
The flow properties of drug-polymer mixtures have a significant influence on their processability when using techniques such as hot melt extrusion (HME). Suitable extrusion temperature and screw speed to be used in laboratory scale HME were evaluated for mixtures containing 30% of paracetamol (PRC), ibuprofen (IBU), or indomethacin (IND), and 70% of polyethylene oxide, by using small amplitude oscillatory shear rheology. The initial evaluation of the drug:polyethylene oxide solubility was estimated by differential scanning calorimetry of the physical mixtures containing a wide range of weight fractions of the drug substances. Consecutively, the mixtures were extruded, and the maximum plasticizing weight fraction of each drug was determined by means of rheological measurements. IBU was found to have an efficient plasticizing functionality, decreasing the viscosity of the mixtures even above its apparent saturation solubility, whereas IND and PRC initially lowered the viscosity of the mixture slightly but increased it significantly with increasing drug load. The main reason for the enhanced plasticization effect seems to be the lower melting temperature of IBU, which is closer to the used HME temperature, compared to PRC and IND. This study highlights the importance of rheological investigation in understanding the drug-polymer interactions in melt processing.
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Affiliation(s)
- Johanna Aho
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark.
| | - Magnus Edinger
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Johan Botker
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | | | - Jukka Rantanen
- Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
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246
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247
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Knopp MM, Olesen NE, Huang Y, Holm R, Rades T. Statistical Analysis of a Method to Predict Drug–Polymer Miscibility. J Pharm Sci 2016; 105:362-7. [DOI: 10.1002/jps.24704] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/07/2015] [Accepted: 10/05/2015] [Indexed: 11/11/2022]
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248
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Alhijjaj M, Bouman J, Wellner N, Belton P, Qi S. Creating Drug Solubilization Compartments via Phase Separation in Multicomponent Buccal Patches Prepared by Direct Hot Melt Extrusion–Injection Molding. Mol Pharm 2015; 12:4349-62. [DOI: 10.1021/acs.molpharmaceut.5b00532] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Muqdad Alhijjaj
- School
of Pharmacy, University of East Anglia, Norwich, Norfolk, U.K., NR4 7TJ
- College
of Pharmacy, University of Basrah, Basrah, Iraq
| | - Jacob Bouman
- Laboratory
of Physical Chemistry and Colloid Science, Wageningen University, Wageningen, The Netherlands
- Physics
and Physical Chemistry of Foods, Wageningen University, Wageningen, The Netherlands
| | - Nikolaus Wellner
- Institute
of Food Research, Norwich Research Park, Colney Lane, Norwich, Norfolk, U.K., NR4 7UA
| | - Peter Belton
- School of
Chemistry, University of East Anglia, Norwich, Norfolk, U.K., NR4 7TJ
| | - Sheng Qi
- School
of Pharmacy, University of East Anglia, Norwich, Norfolk, U.K., NR4 7TJ
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249
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Lu J, Cuellar K, Hammer NI, Jo S, Gryczke A, Kolter K, Langley N, Repka MA. Solid-state characterization of Felodipine-Soluplus amorphous solid dispersions. Drug Dev Ind Pharm 2015; 42:485-96. [PMID: 26530290 DOI: 10.3109/03639045.2015.1104347] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The aim of the current study is to develop amorphous solid dispersion (SD) via hot melt extrusion technology to improve the solubility of a water-insoluble compound, felodipine (FEL). The solubility was dramatically increased by preparation of amorphous SDs via hot-melt extrusion with an amphiphilic polymer, Soluplus® (SOL). FEL was found to be miscible with SOL by calculating the solubility parameters. The solubility of FEL within SOL was determined to be in the range of 6.2-9.9% (w/w). Various techniques were applied to characterize the solid-state properties of the amorphous SDs. These included Fourier Transform Infrared Spectrometry spectroscopy and Raman spectroscopy to detect the formation of hydrogen bonding between the drug and the polymer. Scanning electron microscopy was performed to study the morphology of the SDs. Among all the hot-melt extrudates, FEL was found to be molecularly dispersed within the polymer matrix for the extrudates containing 10% drug, while few small crystals were detected in the 30 and 50% extrudates. In conclusion, solubility of FEL was enhanced while a homogeneous SD was achieved for 10% drug loading.
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Affiliation(s)
- Jiannan Lu
- a Department of Pharmaceutics and Drug Delivery , School of Pharmacy, the University of Mississippi, University , MS , USA
| | - Kristina Cuellar
- b Department of Chemistry and Biochemistry , The University of Mississippi, University , MS , USA
| | - Nathan I Hammer
- b Department of Chemistry and Biochemistry , The University of Mississippi, University , MS , USA
| | - Seongbong Jo
- a Department of Pharmaceutics and Drug Delivery , School of Pharmacy, the University of Mississippi, University , MS , USA
| | - Andreas Gryczke
- c BASF SE, Global Development and Technical Marketing , Ludwigshafen , Germany
| | - Karl Kolter
- d BASF SE, R&D Product Management Excipients , Ludwigshafen , Germany
| | | | - Michael A Repka
- a Department of Pharmaceutics and Drug Delivery , School of Pharmacy, the University of Mississippi, University , MS , USA .,f Pii Center for Pharmaceutical Technology, School of Pharmacy, the University of Mississippi, University , MS , USA
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250
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Kanaujia P, Poovizhi P, Ng W, Tan R. Amorphous formulations for dissolution and bioavailability enhancement of poorly soluble APIs. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2015.05.012] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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