Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Ortho-hydroxybenzoic acid or derivative doai
Patent
1995-05-23
1996-07-30
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Ortho-hydroxybenzoic acid or derivative doai
424457, 424474, 424489, 424490, 514159, A61K 31615, A61K 3160, A61K 928
Patent
active
055411711
ABSTRACT:
A solid dosage form, such as a capsule or tablet, containing a pharmacologically active agent is coated with an anionic polymer, which is insoluble in gastric juice and in intestinal juice below pH7 but soluble in colonic intestinal juice, in a sufficient amount that the oral dosage form remains intact until it reaches the colon. The preferred anionic polymer is a partly methyl esterified methacrylic acid polymer in which the ratio of free carboxylic groups to ester groups is about 1:2. The invention has particular application to dosage forms of prednisolone and salts thereof, indomethacin, ibuprofen, and, especially, 5-amino-salicylic acid.
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"Comparison of the Absorption and Metabolism of Sulphasalazine and Acrylic-coated 5-Amino Salicylic Acid in Normal Subjects and Patients with Colitis", Br. J. Clin. Pharmac. (1984), 17.000-000, M. J. Dew et al.
Evans Brian K.
Rhodes John
Dodson Shelley A.
Tillotts Pharma AG
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