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Related Experiment Videos

Propranolol in experimentally induced stress.

S Nakano, H K Gillespie, L E Hollister

    Psychopharmacology
    |December 8, 1978
    PubMed
    Summary

    Propranolol, a beta-blocker, did not effectively reduce anxiety in individuals with high trait anxiety, despite slowing heart rate. The drug showed no significant benefit over placebo in this experimental anxiety model.

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    Annals of internal medicine·1998

    Area of Science:

    • Psychopharmacology
    • Clinical Psychology
    • Cardiology

    Background:

    • Beta-adrenergic receptor antagonists, like propranolol, are used to manage anxiety symptoms.
    • Trait anxiety influences an individual's response to stress and anxiety-provoking situations.
    • Experimental models are crucial for evaluating the efficacy of anxiolytic agents.

    Purpose of the Study:

    • To investigate the efficacy of d,l-propranolol in alleviating experimentally induced anxiety in individuals with high trait anxiety.
    • To compare the anxiolytic effects of propranolol with placebo using a validated experimental stress model.

    Main Methods:

    • Participants with high trait anxiety were subjected to experimental stress via performance tests.
    • Subjects received a single 40-mg dose of d,l-propranolol or a placebo.
    • Anxiety levels and physiological responses, including heart rate, were measured.

    Main Results:

    • Propranolol (40 mg) significantly reduced heart rate, indicating a pharmacologic effect.
    • No significant differences in anxiety measures were observed between the propranolol and placebo groups.
    • The experimental model successfully demonstrated the anxiolytic effect of diazepam (5 mg) in prior studies.

    Conclusions:

    • A single 40-mg dose of propranolol was ineffective in reducing psychic anxiety in this experimental model.
    • Propranolol's beta-blocking effect on heart rate did not translate to significant anxiolytic benefits for psychic anxiety.
    • Further research may be needed to explore optimal dosing or different therapeutic applications of propranolol for anxiety.

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