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Age-dependent changes in pharmacokinetics are considered a possible factor contributing to a higher risk of side-effects from drug treatment in the elderly. However, very little is known about the kinetics and metabolism of most NSAI agents in geriatric subjects. In a prospective age-comparison study, the single dose and steady-state pharmacokinetics of piroxicam 20 mg once daily were determined in 44 subjects ranging in age from 30 to 80 years. Plasma concentrations, elimination half-life, AUC, and volume of distribution were not influenced by age or sex and were in agreement with previously reported results in young adults. Pharmacokinetic parameters in 18 patients with evidence of mild or moderate renal impairment at study entry were not different from those in patients without impairment. Based on this and other studies, elderly patients receiving the recommended dose of piroxicam are not exposed to undue risk related to pharmacokinetic considerations.
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