Estradiol Valerate Tablets Caused Rare Severe Drug Eruption: The First Reported Case.

Severe drug eruption is a severe allergic reaction to a drug, usually due to irritation with certain drugs. It may be present as a generalized erythematous maculopapular rash, a pleomorphic rash, with or without blisters and ulcers. To the best of our knowledgeto date, there is no report of estradiol valerate-induced severe drug eruption. A case of rare severe drug eruption after taking estradiol valerate tablets was first reported to promote clinical drug safety management, especially for rare severe adverse reactions. Meanwhile, it is speculated that estrogen dermatitis might be associated with dendritic cell-mediated allergic mechanisms, inflammation-induced expression of estrogen receptor β, and elevated estrogen levels during pregnancy, according to previous studies. Therefore, pregnant women using this drug need to be focused on. Early and systemic use of glucocorticoids is beneficial to the outcome and prognosis of the disease. It highlights the need for clinicians to be vigilant about rare but serious adverse drug reactions, even with medications that are generally considered safe.