ABCB1 and Skin rash: For the skin rash ADR, the ABCB1 gene rs1128503 with the polymorphism 1236C>T (CT + TT group versus CC group) was significantly associated with the presence of skin rash development (OR = 6.99; 95% CI: 1.61–30.30; p = 0,009; and I2 = 0%).