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Related Experiment Videos

Minaxolone: an evaluation with and without premedication

H G McNeill, R S Clarke, J W Dundee

    Anaesthesia
    |June 1, 1981
    PubMed
    Summary

    Minaxolone, an intravenous anesthetic, showed promise for minor surgeries but was withdrawn due to toxicological concerns in rats. Faster infusion rates improved induction, though excitatory effects were noted.

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    Area of Science:

    • Anesthesiology
    • Pharmacology
    • Toxicology

    Background:

    • Minaxolone is a water-soluble steroid intravenous anesthetic.
    • It has been evaluated in clinical trials for anesthesia induction and maintenance during minor surgical procedures.

    Purpose of the Study:

    • To assess the efficacy and safety of minaxolone as an intravenous anesthetic.
    • To determine optimal administration parameters for minaxolone induction.
    • To investigate potential adverse effects and toxicological findings.

    Main Methods:

    • Standard induction dose of 0.5 mg/kg minaxolone administered intravenously.
    • Comparison of different infusion rates (6 ml/minute vs. 24 ml/minute) for the 5 mg/ml solution.
    • Evaluation of pain on injection, venous sequelae, and excitatory effects.
    • Review of toxicological findings in rat studies.

    Main Results:

    • Low incidence of pain on injection and venous sequelae observed.
    • Excitatory effects were common during induction but mitigated by opiate premedication.
    • Uneventful induction frequency was significantly higher with a 6 ml/minute infusion rate compared to 24 ml/minute.
    • Equivocal toxicological findings in rats necessitated further investigation.

    Conclusions:

    • Minaxolone demonstrated a favorable profile for minor procedures regarding injection site tolerance and venous complications.
    • Administration rate significantly impacts induction quality, with slower rates being more effective.
    • The drug's development was halted due to unresolved toxicological concerns in preclinical studies.
    • Further toxicological investigation is required to fully understand minaxolone's safety profile.

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