AIM: To determine different concentrations of total glucosides of paeony(TGP) regulating tumor necrosis factor(TNF) production by peritoneal macophages(MΦ) in rats. METHODS: 45 Ca influx, the amount of prostaglandin E 2(PGE 2) and TNF in MΦ media were measured in the presence or absence of the inhibitors of cycloxygenase and calmodulin and other tool drugs. RESULTS: TGP(0 5 ̄10 mg·L -1 ) markedly increased both 45 Ca influx and TNF production in MΦ induced by lipopolys...