Bleomycin induced damage was significantly reduced (p < 0.05) in lymphocytes preexposed to the decoction at the tested dose range. Overall reduction was nearly 72% (25 MN per 1000 binucleated cells) when compared with the bleomycin control (88 MN per 1000 binucleated cells). This result suggests a significant protective effect of the decoction against genomic damage induced by bleomycin.