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The chemical name is 3,3' -azobis (6-hydroxybenzoate)salicylic acid. It is sold as the disodium salt.
Like balsalazide, olsalazine is believed to deliver mesalazine, or 5-aminosalicylic acid (5-ASA), past the small intestine, directly to the large intestine, which is the active site of disease in ulcerative colitis.
Olsalazine gained Food and Drug Administration (FDA) approval in 1990.
The drug is supplied by UCB Pharma.
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