Abstract
The antiinflammatory effects of 10 newly synthesized pyrazole derivatives on formaldehyde-induced rat paw edema were investigated. The most effective of them (K-3) was investigated again in dextran- and carrageenan-induced paw edema. In formaldehyde-induced paw edema, K-3 50, 100, and 200 mg/kg p.o. inhibited the edema by 48.9% (p<0.002), 68.7% (p<0.001), and 79.1% (p<0.001), respectively, 3 h after administration. In dextran-induced paw edema, the same dose of K-3 produced 27.1% (p<0.05), 46.8% (p<0.01), and 63.8% (p<0.002) inhibition, respectively. In the carrageenan-induced paw edema test, K-3 100 mg/kg decreased the inflammatory response by 52.0% after 4 h. Acute toxicity studies revealed that K-3 was nontoxic up to an oral dose of 2500 mg/kg.
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