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REVIEWS AND ORIGINAL ARTICLES |
From the Department of Phannacy and Division of Nephrology, Department of Medicine, University of Toronto, Sunnybrook Medical Center, Toronto, Ontario, Canada.
The disposition of cimetidine was studied following a single intravenous
dose of 300 mg over 10 minutes in six male patients with end-stage renal
disease on continuous ambulatory peritoneal dialysis (CAPD). The infusion of
cimetidine and CAPD were initiated simultaneously. Cimetidine disappearance
from plasma was biphasic with beta-phase ti varying from 6.1 to 7.4 hours. The
total body clearance varied from 138 to 195 ml/min with a peritoneal clearance
ranging from 1.9 to 4.0 ml/min. The total amount of cimetidine removed in the
dialysate varied from 3.1 to 8.3 mg (1.2 to 2.7% of the dose administered)
over 24 hours. This study demonstrates that very little cimetidine is removed
by CAPD. We recommend that, to avoid toxicity, patients on CAPD should be
given 200 mg cimetidine every 12 hours.
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