Studies on the anti-inflammatory activity of rhizomes of Nelumbo nucifera.
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The anti-inflammatory activity of the methanol extract of Nelumbo nucifera rhizome as well as of betulinic acid, a steroidal triterpenoid isolated from it, were evaluated on carrageenin and serotonin induced rat paw edema. Methanol extract at doses of 200 and 400 mg/kg and betulinic acid at doses of 50 mg/kg and 100 mg/kg p.o., showed significant anti-inflammatory activity in both the models of inflammation in rats. The effects produced were comparable to that of phenylbutazone and dexamethasone, two prototype anti-inflammatory drugs.