Chromosomal aberrations in bleomycin control were significantly high when compared with the negative control. On exposure to bleomycin, there was a 7-fold increase in the frequency of cells with dicentrics (0.27 per 100 cells) when compared to the index in negative control group (0.037 per 100 cells). The increases observed in AF (8-fold increase) and ChB (7-fold increase) were similar to that observed with respect to DC. In the test cells (lymphocytes exposed to bleomycin plus the decoction) there was a significant reduction (p < 0.05) in chromosomal damage when compared with the bleomycin control. The reductions in DC, AF, and ChB at the decoction dose of 300 μg/mL were nearly 2-fold that of the bleomycin control. The maximum percentage of inhibitions for DC (48%), AF (47%), and ChB (37%) was observed at the decoction dose of 300 μg/mL. However, a slight deterioration in the protection was observed at a decoction dose of 600 μg/mL (Table 1).