Effects of PZM on the levels of CAT (A), SOD (B), GSH-Px (C), MDA (D) and GSH (E) against CCl4-induced hepatoxicity in mice. Group I: normal control; group II: PZM control; group III: model; group IV: Silymarin-treated; group V: PZ-treated; group VI: PZM-treated (20 mg/kg); group VII: PZM-treated (40 mg/kg), group VIII: PZM-treated (80 mg/kg). values are expressed as mean ± SD.∗P < 0.05, ∗∗P < 0.01 compared to normal group. +P < 0.05, ++P < 0.01 compared to model group.