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The interaction between halofenate and propranolol

D H Huffman, D L Azarnoff, D W Shoeman

    Clinical Pharmacology and Therapeutics
    |June 1, 1976
    PubMed
    Summary
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    Halofenate significantly reduced plasma propranolol concentration and beta-adrenergic blockade in a double-blind study. This finding suggests a potential drug interaction affecting propranolol efficacy.

    Area of Science:

    • Pharmacology
    • Cardiovascular Medicine

    Background:

    • Propranolol is a beta-adrenergic blocker used for various cardiovascular conditions.
    • Understanding drug interactions is crucial for patient safety and treatment efficacy.

    Purpose of the Study:

    • To investigate the effect of halofenate on the beta-adrenergic blockade induced by propranolol.
    • To assess changes in plasma propranolol concentration during co-administration with halofenate.

    Main Methods:

    • A randomized, double-blind study was conducted involving 4 subjects.
    • Subjects received chronic drug administration of halofenate or placebo.

    Main Results:

    • Plasma propranolol concentration was significantly lower when co-administered with halofenate compared to placebo.

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  • The reduction in propranolol levels correlated with a decrease in beta-adrenergic blockade.
  • Conclusions:

    • Halofenate may decrease plasma concentrations of propranolol.
    • The underlying mechanism for this interaction requires further investigation.