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  • Title: A study of practolol elimination in all grades of chronic renal failure.
    Author: Kaye CM, Kumana CR, Franklin DA, Baker LR.
    Journal: Int J Clin Pharmacol Biopharm; 1975 Jul; 12(1-2):83-8. PubMed ID: 1165145.
    Abstract:
    Plasma and renal elimination of practolol have been studied in 12 patients with varying degrees of stable chronic renal failure and 14 normal volunteers. Each individual received 200 mg of oral practolol. The mean time to peak plasma level in the group of patients with renal failure was later than in the normal group, the difference between the two being significant. There were significant correlations between plasma practolol clearance and creatinine clearance, and also between renal practolol clearance and creatinine clearance. Total clearance of practolol from plasma was slightly higher than its renal clearance, the difference being significant, which suggested a small non-renal component to elimination. Renal practolol clearances tended to exceed creatinine clearances, the difference being significant, suggesting some renal tubular secretion of the drug. It is suggested that--in patients with chronic renal failure--the maintenance dose of practolol be reduced roughly in proportion to the reduction in creatinine clearance from normal. If effective plasma practolol concentrations are required quickly, the need for giving a loading dose becomes important under such circumstances.
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