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Ergotamine absorption and toxicity

D A Orton, R J Richardson

    Postgraduate Medical Journal
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Adverse reactions to ergotamine are linked to plasma concentrations exceeding 1.8 ng/ml. This finding highlights the importance of monitoring ergotamine levels to ensure patient safety during therapeutic use.

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    Area of Science:

    • Pharmacology
    • Clinical Toxicology

    Background:

    • Ergotamine is a medication used for treating migraines.
    • Understanding its pharmacokinetic profile and adverse reactions is crucial for safe and effective use.

    Purpose of the Study:

    • To investigate the relationship between plasma ergotamine concentrations and the occurrence of adverse reactions.
    • To analyze pharmacokinetic data of ergotamine in healthy volunteers.

    Main Methods:

    • A review of 41 studies involving therapeutic doses of ergotamine administered to healthy volunteers.
    • Measurement of plasma and urinary ergotamine levels using radioimmunoassay.
    • Correlation of adverse event frequency with measured plasma ergotamine concentrations.

    Main Results:

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    • Adverse reactions were reported in 16 out of 41 studies.
    • A statistically significant increase in adverse reactions was observed when plasma ergotamine levels exceeded 1.8 ng/ml.
    • Pharmacokinetic data, including routes of administration (intravenous, intramuscular, oral, suppository) and dosages, were analyzed.

    Conclusions:

    • Plasma ergotamine concentration is a key factor in predicting adverse reactions.
    • Therapeutic drug monitoring may be beneficial for optimizing ergotamine dosage and minimizing side effects.