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Influence of Age on the Pharmacokinetics of Alfentanil

Gender Dependence

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Summary

Studies on the effects of age on the pharmacokinetics of alfentanil are inconclusive. A possible factor in explaining the differences between various studies could be the effect of gender. The authors studied the effects of age on the pharmacokinetics of alfentanil in female (n = 21) and male (n = 15) patients undergoing lower abdominal surgery under nitrous oxide alfentanil anaesthesia. There was a significant negative correlation (r = −0.79, p < 0.001) between plasma alfentanil clearance (CL) and age in women (<50y, median CL 24.84 L/h; >50y, median CL 14.52 L/h), but not in men (<50y, median CL 19.44 L/h; >50y, median CL 16.2 L/h). The conclusion is drawn that the effects of age on the pharmacokinetics of alfentanil are gender-dependent.

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Lemmens, H.J.M., Burm, A.G.L., Hennis, P.J. et al. Influence of Age on the Pharmacokinetics of Alfentanil. Clin Pharmacokinet 19, 416–422 (1990). https://doi.org/10.2165/00003088-199019050-00005

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