| 摘要 |
<p>Application for Letters Patent on an Invention Entitled: "ENTERIC CAPSULES" Pharmaceutical capsules having enteric properties are formed from a homogeneous composition comprising (1) gelatin or hydroxypropyl methylcellulose and (2) an ammonium salt of either a) cellulose acetate phthalate, b) hydroxypropyl methylcellulose phthalate, or c) a copolymer of methacrylic acid and methacrylic acid alkyl ester; optionally with the inclusion of plasticizer and/or coloring agent. The capsules are soluble in or disintegrated by the alkaline intestinal secretions but are substantially insoluble or resistant to solution in the acid secretions of the stomach.</p> |
