Effects of curcumin on the pharmacokinetics of talinolol in human with ABCB1 polymorphism.

This study was to investigate the effect of concomitantly administered curcumin on the pharmacokinetics of talinolol and association with ABCB1 C3435T genetic polymorphism. A two-phase, randomized, single-blind, crossover study was carried out in 18 healthy male volunteers with different genotypes of ABCB1, including C3435C (CC, n = 6), C3435T (CT, n = 6) and T3435T (TT, n = 6). The pharmacokinetics of talinolol were measured after co-administration of placebo or 1000 mg curcumin capsules once daily for 14 days. The AUC(0-48 h) and AUC(0-∞) of talinolol were increased by 67.0% (95% CI: 1.09~2.25; p = 0.002) and 80.8% (95% CI: 0.92~2.69; p = 0.005) respectively with curcumin co-administration. The C(max) of talinolol was significantly higher after curcumin administration as compared with placebo (p = 0.029).The CL/F of talinolol was decreased by 25.9% (p = 0.005) during the curcumin-treated phase. No significant change in t(max) and t(1/2) of talinolol were observed between the placebo- and curcumin-treated phases. AUC(0-48), AUC(0-∞), C(max) of talinolol were extensively increased and CL(oral)/F decreased in TT subjects. Co-administration of curcumin significantly increased the plasma concentration of talinolol in healthy volunteers. The effect of curcumin on talinolol was associated with ABCB1 genotypes (C3435T).