When injected intraperitoneally in mice, the LD50 of the extract was 471.2 mg/kg body weight and ≥5000 mg/kg body weight. The methanolic extract reduced the mean diameter of the rat paw in carrageenan-induced inflammation when compared to the normal saline-treated group.
The results indicate that the methanol leaf extract exhibits considerable dose-dependent anti-inflammatory action against egg albumin and formalin-induced inflammation at . At doses of 200 and 400 mg/kg, the extract inhibited egg albumin by 26.5 and 29.4%, respectively, at the 5th hour. For all doses 200 and 400 mg/kg, the % inhibition of formalin-induced edema was 32.5.
Plasma activity was significantly lower in the groups treated with the extract at . In the same group, a low plasma level of total protein was also detected. As a result, oral administration of the aqueous bark extract demonstrated antiatherogenic, cardioprotective, and hepatoprotective activity.