scholarly journals Novel Spray Freeze-Drying Technique Using Four-Fluid Nozzle—Development of Organic Solvent System to Expand Its Application to Poorly Water Soluble Drugs

2010 ◽  
Vol 58 (2) ◽  
pp. 195-200 ◽  
Author(s):  
Toshiyuki Niwa ◽  
Hiroko Shimabara ◽  
Kazumi Danjo
Keyword(s):  
Organic Solvent ◽  
Freeze Drying ◽  
Solvent System ◽  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Spray Freeze Drying ◽  
Poorly Water Soluble ◽  
Organic Solvent System

scholarly journals Solubility enhancement of carvedilol using drug–drug cocrystallization with hydrochlorothiazide

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Shivarani Eesam ◽  
Jaswanth S. Bhandaru ◽  
Chandana Naliganti ◽  
Ravi Kumar Bobbala ◽  
Raghuram Rao Akkinepally
Keyword(s):  
Aqueous Solubility ◽  
Sem Analysis ◽  
Water Soluble ◽  
High Permeability ◽  
Poorly Water Soluble Drugs ◽  
Drug Discovery And Development ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Dissolution In Vitro

Abstract Background Increasing hydrophilicity of poorly water-soluble drugs is a major challenge in drug discovery and development. Cocrystallization is one of the techniques to enhance the hydrophilicity of such drugs. Carvedilol (CAR), a nonselective beta/alpha1 blocker, used in the treatment of mild to moderate congestive heart failure and hypertension, is classified under BCS class II with poor aqueous solubility and high permeability. Present work is an attempt to improve the solubility of CAR by preparing cocrystals using hydrochlorothiazide (HCT), a diuretic drug, as coformer. CAR-HCT (2:0.5) cocrystals were prepared by slurry conversion method and were characterized by DSC, PXRD, FTIR, Raman, and SEM analysis. The solubility, stability, and dissolution (in vitro) studies were conducted for the cocrystals. Results The formation of CAR-HCT cocrystals was confirmed based on melting point, DSC thermograms, PXRD data, FTIR and Raman spectra, and finally by SEM micrographs. The solubility of the prepared cocrystals was significantly enhanced (7.3 times), and the dissolution (in vitro) was improved by 2.7 times as compared to pure drug CAR. Further, these cocrystals were also found to be stable for 3 months (90 days). Conclusion It may be inferred that the drug–drug (CAR-HCT) cocrystallization enhances the solubility and dissolution rate of carvedilol significantly. Further, by combining HCT as coformer could well be beneficial pharmacologically too.

Interlaboratory Validation of Small-Scale Solubility and Dissolution Measurements of Poorly Water-Soluble Drugs

2016 ◽  
Vol 105 (9) ◽  
pp. 2864-2872 ◽  
Author(s):  
Sara B.E. Andersson ◽  
Caroline Alvebratt ◽  
Jan Bevernage ◽  
Damien Bonneau ◽  
Claudia da Costa Mathews ◽  
...  
Keyword(s):  
Water Soluble ◽  
Small Scale ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Interlaboratory Validation ◽  
Poorly Water Soluble

Development of biodegradable porous starch foam for improving oral delivery of poorly water soluble drugs

2011 ◽  
Vol 403 (1-2) ◽  
pp. 162-169 ◽  
Author(s):  
Chao Wu ◽  
Zhongyan Wang ◽  
Zhuangzhi Zhi ◽  
Tongying Jiang ◽  
Jinghai Zhang ◽  
...  
Keyword(s):  
Oral Delivery ◽  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble
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