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对乙酰氨基酚吸收对胃排空速率的依赖性。

The dependence of paracetamol absorption on the rate of gastric emptying.

作者信息

Heading R C, Nimmo J, Prescott L F, Tothill P

出版信息

Br J Pharmacol. 1973 Feb;47(2):415-21. doi: 10.1111/j.1476-5381.1973.tb08339.x.

Abstract
  1. The rate of gastric emptying was measured directly in 14 convalescent hospital patients and paracetamol absorption was studied following an oral dose of 1.5 g.2. Rapid gastric emptying was associated with the early appearance of high peak plasma paracetamol concentrations whereas peak concentrations were low and occurred late when gastric emptying was slow.3. There was a significant correlation between the rate of gastric emptying and the 0-4 and 0-24 h urinary excretion of paracetamol and its metabolites.4. In five patients with abnormally slow gastric emptying the mean maximum plasma concentration and 0-4 and 0-24 h urinary excretion of paracetamol were significantly lower than in seven patients with normal gastric emptying rates while the time taken to reach maximum plasma concentrations was longer.5. Individual differences in the rate of gastric emptying may contribute to variable absorption of many drugs.
摘要
  1. 对14名康复期医院患者直接测量胃排空速率,并在口服1.5克对乙酰氨基酚后研究其吸收情况。

  2. 胃排空迅速与血浆对乙酰氨基酚浓度高峰提前出现相关,而胃排空缓慢时高峰浓度较低且出现较晚。

  3. 胃排空速率与对乙酰氨基酚及其代谢产物0至4小时和0至24小时尿排泄量之间存在显著相关性。

  4. 5名胃排空异常缓慢的患者,对乙酰氨基酚的平均最大血浆浓度以及0至4小时和0至24小时尿排泄量显著低于7名胃排空速率正常的患者,而达到最大血浆浓度所需时间更长。

  5. 胃排空速率的个体差异可能导致许多药物吸收的变异性。

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