Use with Aminosalicylates: There is in vitro evidence that aminosalicylate derivatives (e.g., sulphasalazine, mesalazine, or olsalazine) inhibit the TPMT enzyme. Concomitant use of these agents with IMURAN should be done with caution.
The above is from http://www.rxlist.com/cgi/generic/azathioprine_ad.htm. This was just after a quick search, but there are other references that do specifically say "mesalamine", which isn't surprising, as it is also a type of aminosalicylate.
Post Edited (CrohnsDaddy) : 7/30/2008 11:21:54 AM (GMT-6)