Patent ID: 8852631
Filing Date: 2014-10-07
Classification: A61K,A61P,B29C,B29D,B29K,B29L

Abstract:
1. An acid resistant hard pharmaceutical capsule shell consisting essentially of gellan gum, HPMC, and optionally at least one additive selected from the group consisting of inert, non-toxic pharmaceutical grade or food grade pigments, plasticizers, surfactants, and flavouring agents, wherein the weight ratio of gellan gum to HPMC ranges from 4.5 to 15 parts by weight of gellan gum per 100 parts by weight of HPMC, wherein said hard capsule shell exhibits resistance to leakage of at least 1 hour at pH 1.2 in a USP-30 simulated gastric fluid, and further wherein the capsule shell is filled with at least one substance selected from the group consisting of acid-instable substances and substances associated with gastric side effects in humans and/or animals.