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Ibuprofen is a relatively safe anti inflammatory drug among other NSAIDs. However, frequent and long-term administration of ibuprofen in conventional oral preparation is still considered for ulceration. As previously reported, the daily administration of the ibuprofen orally for 14 days in rats caused the gastroduodenal ulcer. Several mechanisms have been reported: the suppression of the gastric prostaglandin synthesis and the local irritant effect on epithelium due to the direct contact of drug with mucosal wall. In this work, developed ibuprofen pellet with double coatings aimed to release ibuprofen only when reaching colonic compartment. The results of pharmacokinetic study reported previously suggested that this might be a successful target. Present study described the potential benefits of this formula in exhibiting effective local anti inflammatory action in colon. Male Wistar rats were induced for ulcerative colitis with 2,4,6-trinitrobenzene sulfonic acid. Twenty four hours after induction, treatments were given using either ibuprofen suspension or pellet for 14 days. Ulcerations were observed visually, with gross anatomic and microscopic examinations. Group treated with ibuprofen pellet showed best recovery nearly close to healthy group. Moreover, the group did not develop ulceration in upper part of GIT. Colonic targeted ibuprofen pellet showed most effective local antiinflammatory action and at the same time reduced the ulcer formation in the upper part of GIT.

The Dual Positive Actions of Colonic Release of Ibuprofen in TNBS-Induced Colitis Wistar Rats