Extensive mucosal erosion and sloughing of tongue: a hitherto unknown complication of topical clotrimazole preparation.

Clotrimazole, a broad-spectrum imidazole antimycotic, is a widely-used prescription as well as an over-the-counter drug for treatment of mucosal (oral, vulvovaginal) candidiasis and dermatophytes. An extremely safe and well-tolerated drug, its safety profile has been well-explored in researches and trials. The commonest complaints are almost always non-serious-pruritus, rashes, paraesthesia (stinging/burning sensation) and erythema on topical applications, and nausea, vomiting, unpleasant taste sensation and elevated liver enzymes on oral preparations (troches). However, mucosal ulceration on topical clotrimazole preparation has not been reported in literature before. We present here the first documentation of extensive bilateral erosions and necrosis of tongue involving the mucosa, submucosa and musculature on application of one percent weight/volume clotrimazole mouth paint in a 27-year-old immunocompetent woman who presented with oral candidiasis.