A polymorphism in ABCB1 (rs1045642) was found to be significantly associated with hypertension (Table 6), and patients with the more unfavorable genotypes (rs1045642 CT and CT/TT) experienced hand-food reaction more frequently (for TT cf. CC, P = 0.028, OR = 6.00, 95% CI = 1.22–29.53; for CT/TT cf. CC, P = 0.037, OR = 4.00, 95% CI = 1.09–14.67; Table 7). This evidence concerns the gene ABCB1 and Hypertension.