Erythema multiforme following exposure to the herbicide atrazine.

Erythema multiforme is an acute hypersensitivity eruption with sharply demarcated papules and plaques. It has many known causes, from herpes simplex virus and drugs to malignancy and environmental factors. Although other herbicides have been linked to erythema multiforme, no previous reports have described a link with atrazine. We present a 24-year-old man with difficulty breathing, bilateral eye pain with redness, and a diffuse rash consistent with erythema multiforme following occupational exposure to atrazine.