Abstract
Among the strategies to improve the biopharmaceutic properties of poorly soluble drugs, Supersaturating Drug Delivery Systems like polymer-based amorphous solid dispersions (SD) have been successfully applied. The screening of appropriate polymeric carriers to compose SD is a crucial point on their development. In this study, hydroxypropylmethylcellulose (HPMC), hydroxypropylmethylcellulose acetate succinate (HPMCAS) types L, M and H and polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (SOL) were evaluated by in vitro supersaturation studies regarding their anti-precipitant ability on the poorly soluble drug candesartan cilexetil (CC) under two different media, including biorelevant conditions. According to the results, HPMCAS M was considered the best carrier to develop SD containing CC among all the polymers tested, due to its good anti-precipitant performance in both media. In addition, the medium used in the in vitro supersaturation studies played an important role on the results, and its selection should be carefully done.
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