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- W2897766479 abstract "In contrast to nifedipine matrix-based extended-release dosage forms, the osmotic pump drug delivery systems have a zero-order drug release independent of external variables such as pH, agitation rate, and dissolution media. The objective of this study focuses on the in vitro evaluation of the mechanical properties of osmotic pump and polymer matrix-based formulations in dissolution media, and the potential impacts that media pH and simulated gastrointestinal contraction have on drug release. Two strengths of osmotic pump product A and polymer matrix-based product B were used in this study. An in-house system was developed with the capability of applying mechanical compression and monitoring mechanical properties of sample during dissolution testing. A United States Pharmacopeia or an in-house apparatus was used for dissolution testing under various conditions. Compared to the product A, the mechanical properties of the product B change significantly at various pHs and mechanical compressions. The results suggest that polymer matrix-based products bear a risk of formulation-related interactions with the gastrointestinal tract during in vivo drug dissolution, especially in the case of concomitant pH and gastric contractile changes. Modified dissolution testing devices may help formulation scientists in product development and provide regulatory agencies with an additional metric for quality assurance of drug products." @default.
- W2897766479 created "2018-10-26" @default.
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- W2897766479 date "2019-03-01" @default.
- W2897766479 modified "2023-10-01" @default.
- W2897766479 title "Effects of Dissolution Medium pH and Simulated Gastrointestinal Contraction on Drug Release From Nifedipine Extended-Release Tablets*" @default.
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- W2897766479 doi "https://doi.org/10.1016/j.xphs.2018.10.014" @default.
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