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Related Experiment Videos

Preclinical safety studies with terfenadine.

J P Gibson, K W Huffmann, J W Newberne

    Arzneimittel-Forschung
    |January 1, 1982
    PubMed
    Summary

    Preclinical safety studies show terfenadine (Teldane) is a relatively nontoxic antihistamine in animals. It demonstrated low toxicity potential compared to other antihistamines, with no mutagenic or carcinogenic effects observed.

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    Area of Science:

    • Pharmacology
    • Toxicology
    • Drug Safety

    Background:

    • Terfenadine (Teldane) is an antihistamine used in preclinical safety assessments.
    • Understanding the toxicological profile of terfenadine is crucial for its therapeutic application.

    Purpose of the Study:

    • To evaluate the preclinical safety and toxicity of terfenadine in animal models.
    • To compare the toxicity potential of terfenadine with other antihistamines.

    Main Methods:

    • Acute toxicity testing (oral LD50) in rats and mice.
    • Chronic toxicity studies in rats, mice, and dogs with varying dosages and durations.
    • Reproductive toxicity studies (fertility, dominant lethal, teratogenicity) in rats and rabbits.
    • Mutagenicity and carcinogenicity assessments.

    Main Results:

    • Terfenadine exhibited low acute oral toxicity (LD50 ~5000 mg/kg).
    • Chronic administration showed good tolerance in rats and mice up to 100 mg/kg/day; higher doses caused weight reduction but no histopathological changes.
    • Dogs tolerated 30 mg/kg/day for 2 years, but higher doses induced adverse effects.
    • No teratogenic effects were observed, but maternal toxicity and effects on offspring were noted at high doses.
    • No evidence of mutagenic or carcinogenic potential was found.

    Conclusions:

    • Terfenadine possesses a favorable preclinical safety profile with a lower toxicity potential than other antihistamines.
    • The drug is generally well-tolerated in chronic animal studies, with dose-dependent effects observed at higher levels.
    • Findings support the relative safety of terfenadine for therapeutic use, warranting further clinical investigation.

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