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    Area of Science:

    • Dermatology
    • Pharmacology

    Background:

    • Thiacetazone is an antibiotic historically used for tuberculosis treatment.
    • Adverse drug reactions can significantly impact patient management and therapeutic choices.

    Observation:

    • Two distinct cases of hypertrichosis were observed.
    • The hypertrichosis developed subsequent to the administration of thiacetazone.

    Findings:

    • A causal relationship between thiacetazone and secondary hypertrichosis is suggested.
    • This adverse effect manifests as abnormal and excessive hair growth.

    Implications:

    • Clinicians should be aware of hypertrichosis as a potential side effect of thiacetazone.
    • Further investigation into the mechanism of thiacetazone-induced hypertrichosis may be warranted.
    • Monitoring patients for dermatological changes during thiacetazone therapy is recommended.