Patent ID: 7223421

Claim:
A taste masked particle comprising a core containing an active ingredient and a continuous polymeric coating covering said core, said coating comprising a mixture of a) an enteric polymer selected from the group consisting of hydroxypropyl metyylcellulose phthalate, hydroxypropy methlcellulose aoeate succinate, cellulose acetate phthalate, polyvinylacetate phthalate, and mixtures thereof; and b) a water insoluble, cellulosic film forming polymer selected from the group consisting of celulose acetate, ethylcellulose, and mixtures thereof, wherein the active ingredient is a nonsteroidal anti-inflammatory drug and is at mixtures thereof, least 80% dissolved in 30 minutes in pH 7.2 phosphate buffer when tested according to USP method II at 50 rpm and is at least 70% dissolved in 60 minutes in pH 5.6 acetate buffer when tested according to USP method II at 50 rpm, wherein the weight ratio of enteric polymer to water insoluble film forming polymer in the coating is in the range of about 20:80 to about 80:20.