Effect of Gastric Fluid Volume on the In Vitro Dissolution and In Vivo Absorption of BCS Class II Drugs: a Case Study with Nifedipine.

Effect of Gastric Fluid Volume on the In Vitro Dissolution and In Vivo Absorption of BCS Class II Drugs: a Case Study with Nifedipine.
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胃液体积对BCS II类药物的体外溶解和体内吸收的影响:硝苯地平的案例研究。

DOI:
10.1208/s12248-016-9918-x
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发表时间:
2016-07
期刊:
The AAPS journal
影响因子:
--
通讯作者:
Foster DR
Foster DR
中科院分区:
其他
文献类型:
--
作者:
Nader AM;Quinney SK;Fadda HM;Foster DR

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硝苯地平是BCS II类药物,用于治疗高血压和早产。硝苯地平吸收的患者间差异较大,导致不同患者的暴露量不同。我们进行了体外溶出度研究,以比较硝苯地平溶出速释(IR)胶囊与不同体积的溶出介质。利用溶出度研究结果设计了一项在健康志愿者中进行的交叉研究,以评价与硝苯地平10 mg IR胶囊联合给药的水量对硝苯地平药代动力学的影响,尤其是吸收(Cmax、tmax和AUC 0 -6)。溶出度研究表明,较大的胃液体积导致硝苯地平从10 mg IR助溶剂胶囊中的溶出度增加(在30 min时,在200 mL和100 mL模拟胃液中分别为73%和17%)。在健康志愿者(N=6)中进行的药代动力学交叉研究未显示胶囊给药的水量(50 ml vs. 250 ml)对口服硝苯地平IR胶囊(10 mg)的Cmax、tmax或AUC 0 -6的显著影响。然而,大水量给药导致硝苯地平Cmax的变异性较低(250 mL和50 mL分别为47%和70%)。硝苯地平10 mg IR共溶剂胶囊与大量水一起给药可降低血浆暴露的个体间变异性。建议评价其他BCS II类药物的类似作用。
Nifedipine is a BCS Class II drug used for treatment of hypertension and preterm labor. Large inter-patient variability in nifedipine absorption results in variable exposure among different patients. We conducted in vitro dissolution studies to compare nifedipine dissolution from immediate release (IR) capsules with different volumes of dissolution media. Results from dissolution studies were used to design a cross-over study in healthy volunteers to evaluate the effect of co-administered water volume with nifedipine 10 mg IR capsules on nifedipine pharmacokinetics, especially absorption (Cmax, tmax, and AUC0–6). Dissolution studies demonstrated that larger gastric fluid volumes result in enhanced nifedipine dissolution from 10 mg IR cosolvent capsules (73% vs. 17% in 200 and 100 mL simulated gastric fluid, respectively, at 30 min). The pharmacokinetic crossover study in healthy volunteers (N=6) did not show a significant effect of the water volume administered with the capsule (50 vs. 250 ml) on Cmax, tmax, or AUC0–6 of orally administered nifedipine IR capsules (10 mg). However, administration of large water volumes resulted in lower variability in nifedipine Cmax (47% vs.70% for 250 mL and 50 mL, respectively). Administration of large water volumes with nifedipine 10 mg IR cosolvent capsules reduces inter-individual variability in plasma exposure. Evaluation of similar effects in other BCS Class-II drugs is recommended.
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