Photoallergic drug eruption secondary to oral terbinafine prescribed for management of tinea incognita

This case presents a 68-year-old woman who developed a photoallergic drug reaction secondary to oral terbinafine. Oral and topical terbinafine were prescribed to treat a widespread intensely pruritic tinea incognito infection. This case highlights a rare adverse effect to a medication commonly prescribed by both dermatologists and physicians in general.