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The pharmacokinetics of vinpocetine and its main metabolite, apovincaminic acid (AVA), were studied in the aged. Vinpocetine was eliminated with a mean half-life of 2.12 +/- 0.51 h. Total plasma clearance (CL) and distribution coefficient (delta) of the parent drug were 2.2 +/- 0.9 l.kg-1.h-1 and 6.7 +/- 3.7 l.kg-1, respectively. The CL and delta of vinpocetine differed significantly from young subjects but the elimination half-life was not altered. Significant changes in the elimination half-life and plasma clearance of AVA were found, perhaps because of the physiological decrease in renal function.
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