Price D E, Mehta A, Park B K, Hay A, Feely M P
Br J Clin Pharmacol. 1986 Dec;22(6):744-7. doi: 10.1111/j.1365-2125.1986.tb02970.x.
The effects of low-dose phenobarbitone on three indices of hepatic enzyme induction were studied. Eight healthy volunteers took phenobarbitone 7.5 mg daily for 4 weeks followed by 15 mg daily for 4 weeks; five subjects took 30 mg daily for a further 2 weeks. Phenobarbitone 15 mg daily produced a significant rise in antipyrine clearance (P less than 0.05). Phenobarbitone 30 mg daily produced a further rise, but probably because of the reduced numbers of subjects, this did not achieve significance (P = 0.06). Urinary 6-beta-hydroxycortisol and D-glucaric acid levels did not change significantly and remained within the range seen in subjects not taking enzyme-inducing drugs. We conclude that phenobarbitone 7.5 mg daily produces little (if any) enzyme induction whereas 15 mg, or more, may have the potential to produce drug interactions through enzyme induction.
研究了低剂量苯巴比妥对肝酶诱导三个指标的影响。八名健康志愿者连续4周每天服用7.5毫克苯巴比妥,随后4周每天服用15毫克;另外五名受试者连续2周每天服用30毫克。每天服用15毫克苯巴比妥使安替比林清除率显著升高(P<0.05)。每天服用30毫克苯巴比妥使清除率进一步升高,但可能由于受试者数量减少,未达到显著水平(P = 0.06)。尿中6-β-羟基皮质醇和D-葡萄糖醛酸水平无显著变化,仍在未服用酶诱导药物的受试者所见范围内。我们得出结论,每天服用7.5毫克苯巴比妥几乎不产生(如果有)酶诱导作用,而15毫克或更多剂量可能有通过酶诱导产生药物相互作用的潜力。