Patent ID: 9320796
Filing Date: 2016-04-26
CPC Classification: A61K,A61P

Claim Text:
1. An abuse deterrent pharmaceutical composition comprising an immediate release unit dose of: a. a pharmaceutically active ingredient; b. an acid soluble ingredient comprising a cationic copolymer based on dimethylaminoethyl methacrylate, butyl methacrylate, and methyl methacrylate, wherein the acid soluble ingredient is present in an amount of about 1 wt % to about 50 wt %; and c. a buffering ingredient comprising one or more of calcium carbonate, sodium bicarbonate, magnesium oxide, tribasic sodium phosphate, and combinations thereof; wherein the acid soluble ingredient and the buffering ingredient retard release of the pharmaceutically active ingredient when three unit doses or greater of the composition is ingested.