DRUG DELIVERY SYSTEMS COMPRISING SOLID SOLUTIONS OF WEAKLY BASIC DRUGS

摘要

The present invention is directed to pharmaceutical compositions and dosage forms comprising TPR beads, wherein said TPR beads comprise a solid dispersion of at least one active pharmaceutical ingredient in at least one solubility-enhancing polymer, and a TPR coating comprising a water insoluble polymer and an enteric polymer, wherein the active pharmaceutical ingredient comprises a weakly basic active pharmaceutical ingredient having a solubility of not more than 100 µg/mL at pH 6.8.