Acitretin induced primary hypothyroidism in Darier's disease: A rare case report.

Acitretin is a synthetic, second-generation retinoid mainly used for the treatment of Darier's disease (DD), which impacts biological processes by binding to a nuclear receptor from the corticosteroid/thyroid receptor superfamily, thereby altering gene expression. Our report outlines the case of a 41-year-old male patient who has received a clinical diagnosis of DD and does not exhibit any other coexisting comorbidities, who developed hypothyroidism posttreatment with acitretin, an unusual and rare side effect of the drug. His baseline routine investigations fell within normal limits before the initiation of acitretin. Acitretin-induced hypothyroidism was treated with thyroxine. Although a good therapeutic response was seen with acitretin, it could not be continued due to the development of side effects and was continued on topical therapy. This case emphasizes the likelihood of adverse effects linked to therapeutic levels of acitretin in patients without any prior history and signifies the critical importance of consistent blood monitoring throughout drug therapy.

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