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A decrease in dietary protein intake lowers the clearance of a number of substances excreted principally by the kidney including uric acid and oxypurinol, the major metabolite of allopurinol. We studied the kinetics of uric acid and oxypurinol in seven healthy volunteers on a normal protein diet (2600 calories; 100 g protein) followed by a 400 calorie,(More)
In previous studies a low-calorie, low-protein diet caused a sustained reduction in both oxypurinol and uric acid renal clearances (CLR). With the hypothesis that the decrease in CLR was due to the low-protein and not the low-caloric content of the diet, we studied the CLR of oxypurinol, uric acid, creatinine, and inulin in normal subjects during isocaloric(More)
Diet is one of many factors that influence the pharmacokinetics of drugs. The level of protein intake has been found to significantly influence drug metabolism and glomerular filtration, both of which play an important role in the clearance of drugs. Recently, a marked change, resulting from restricted dietary protein intake, has been reported in the(More)
To evaluate the relative abilities of superactivated charcoal (20 g twice daily) and cholestyramine (8 g twice daily) to lower plasma cholesterol concentrations acutely, six hypercholesterolemic patients were studied using a randomized cross-over design. After a 1-week dietary control period, each subject received 3 weeks of each treatment regimen on(More)
The renal clearance of oxipurinol, the major metabolite of allopurinol, was studied in six healthy subjects during normal and restricted (low protein and low calorie) diets. A 600 mg oral dose of allopurinol was administered after 7 days of a normal diet (100 mg protein/day) and again after 2 and 4 weeks of a restricted diet (19 gm protein/day). The renal(More)
The renal elimination of the weak-base cimetidine was studied in five healthy male subjects during normal and restricted (low-protein, low-calorie) diets in a randomized crossover fashion. An intravenous dose of cimetidine, 7 mg/kg, was administered on day 7 of the normal (100 gm/70 kg protein/day) and the restricted (19 gm/70 kg protein/day) diets. The(More)
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