Pharmacological Profile of Alminoprofen among Four Writhing Models of Mice Caused by Kaolin, Zymosan, Acetylcholine and Phenylquinone

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The effects of alminoprofen and other non-steroidal antiinflammatory drugs (NSAIDs) on the writhing reaction caused by kaolin, acetylcholine, phenylquinone and zymosan were studied. Aspirin, indomethacin, ibuprofen and diclofenac-Na, as cyclooxygenase inhibitors, showed similar potency ratios on four writhing tests, although, alminoprofen exhibited a somewhat rather higher potency ratio on kaolin- and zymosan-induced writhing models than on acetylcholine- and phenylquinone-induced writhing models. All NSAIDs, cyclooxygenase inhibitors except alminoprofen showed similar shapes in illustrations of potency ratio when the potency of aspirin was expressed as 1.0. The potency of alminoprofen produced a figure unlike those of other cyclooxygenase inhibitors. These results suggest that alminoprofen has a different pharmacological profile from other general NSAIDs in terms of analgesic action. This combination method with potency ratios for writhing reactions caused by the above four inducers could be a simple method for classification of pharmacological profiles of the analgesic actions of NSAIDs.
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