Lichenoid drug reactions induce lesions that are clinically and histologica
lly almost indistinct from idiopathic lichen planus. Fortunately, most such
eruptions are not induced by medications used to treat idiopathic disease.
We describe a patient with the vulvo vaginal-gingival variant of lichen pl
anus who developed a lichenoid drug reaction after receiving isotretinoin f
or her condition.