Liver toxicity was significantly less frequent in carriers of polymorphic SLCO1B1 rs11045879 (p = 0.014; OR = 0.18; 95% CI = 0.05−0.71) and rs4149056 (p = 0.028; OR = 0.23; 95% CI = 0.06−0.85) alleles. This evidence concerns the gene SLCO1B1 and hepatotoxicity.