Research Progress on Drug-Induced Gynecomastia

    October 2015 in “ 药物不良反应杂志
    Ailing Zhang, Guijun Qin, Haiyang Meng, Yanxia Liu
    TLDR Stopping the drug usually helps, but tamoxifen or surgery may be needed if symptoms persist.
    The document reviewed the condition of drug-induced gynecomastia, which was a disorder characterized by the abnormal enlargement of male breast tissue due to an imbalance in estrogen and androgen levels. This condition accounted for 10% to 25% of all gynecomastia cases. Common drugs that could induce this condition included ketoconazole, spironolactone, imatinib, bicalutamide, finasteride, and cimetidine. Symptoms included breast tenderness, pain, and lactation, with laboratory tests showing increased levels of estradiol and estriol, and decreased levels of luteinizing hormone, follicle-stimulating hormone, and testosterone. While most cases were reversible upon discontinuation of the drug, persistent cases could be treated with tamoxifen or surgical removal of breast tissue if symptoms lasted over 1 year or if drug treatment was ineffective. The review aimed to provide clinical guidance based on recent research findings.
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