Figure 3.

Effect of the oral administration of metronidazole (MTZ) (500 mg/kg BW/day) and co-administration of MTZ (500 mg/kg BW/day) and Tribulus terrestris (100 mg/kg BW/day and 200 mg/kg BW/day) on the (a) activity of lactate dehydrogenase (b) activity of alkaline phosphatase in the testis (values are mean ± standard error of the mean of five animals). _aSignificantly different from the controls at P < 0.05 by ANOVA followed by Newman–Keul's multiple range test, ^bSignificantly different from MTZ (500mg/kg BW/day) at P < 0.05 by ANOVA followed by Newman–Keul's multiple range test