Pharmacokinetics of amitriptyline in the elderly
Henry, J.F.; Altamura, C.; Gomeni, R.; Hervy, M.P.; Forette, F.; Morselli, P.L.
International Journal of Clinical Pharmacology Therapy and Toxicology 19(1): 1-5
1981
ISSN/ISBN: 0174-4879 PMID: 7203728 Document Number: 5606
The pharmacokinetics of amitryptyline (AMI) have been evaluated in six healthy elderly volunteers (72-83 years of age) after a single dose of 125 mg of AMI-HCl. AMI was absorbed rather slowly (mean peak time 10.4 +/- 1.6 hrs) but very efficiently (F: 0.59-0.75). The rate of formation of nortriptyline (NT) as well as the appearance clearance values (0.18-0.45 l/h/kg) of AMI were significantly lower than those previously described for younger subjects. Reversible alterating ECG were observed in 5 cases concomitantly with AMI peak plasma concentrations. The results indicate the desirability of reduced and/or divided daily doses of AMI in the elderly.
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