Cimetidine improves prediction of the glomerular filtration rate by the Cockcroft-Gault formula in renal transplant recipients

Transplantation
Frits A KempermanLambertus Arisz

Abstract

The glomerular filtration rate (GFR) can be predicted from plasma creatinine, age, gender, and body weight, using the formula of Cockcroft and Gault. Cimetidine improved the accuracy of GFR prediction in renal disease and also in diabetes mellitus type 2, due to inhibition of tubular creatinine secretion. We compared the accuracy and precision of GFR prediction from the Cockcroft-Gault formula without cimetidine (CG), with cimetidine (CGcim) and from the creatinine clearance without cimetidine in renal transplant recipients. CG and CGcim were calculated from plasma creatinine before and after 2400 mg of oral cimetidine during the 24 hr preceding the GFR measurement. The endogenous creatinine clearance was measured in 24 outpatients from a 24-hr urine collection (Ccr24) before cimetidine. GFR was measured as the urinary clearance of continuously infused 125I-iothalamate. Creatinine was determined with an automated enzymatic assay in plasma and with an alkaline picrate assay in urine. GFR was 47.8+/-16.8 ml/min/1.73 m2 (mean+/-SD), Ccr24 was 71.8+/-23.1 ml/min/1.73 m2, CG was 62.2+/-15.2 ml/min/1.73 m2, and CGcim was 52.8+/-14.9 ml/min/1.73 m2. Ccr24 overestimated GFR in every patient by an average of 23.8 ml/min/1.73 m2 and CG b...Continue Reading

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Citations

Nov 11, 2003·Clinical Pharmacokinetics·Susan E TettAndrew J McLachlan
Feb 27, 2007·Journal of Renal Nutrition : the Official Journal of the Council on Renal Nutrition of the National Kidney Foundation·Andreia S P S CoroasMaria D V Almeida
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