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Last Updated: December 11, 2025

Claims for Patent: 4,657,900

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Summary for Patent: 4,657,900

Title:	Pharmaceutical article of manufacture comprising a bisulfite stabilized aqueous solution of 5-aminosalicylic acid and method
Abstract:	An aqueous suspension of pure 5-aminosalicylic acid adapted for rectal administration is rendered storage stable against color formation by storing the suspension in a single dose polyethylene bottle adapted for rectal administration of the suspension, in a substantially oxygen-free atmosphere and in the presence dissolved therein of up to about 0.25% of bisulfite and protecting the suspension from exposure to atmospheric oxygen during storage by sealing the plastic bottle, in a substantially oxygen-free atmosphere, in a plastic pouch having a low oxygen transmission rate.
Inventor(s):	David R. Powell, Vithal K. Patel
Assignee:	Rowell Laboratories Inc, Solvay Pharma Properties Inc
Application Number:	US06/717,062
Patent Claims:

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