Erythema multiforme due to clonazepam - supportive evidence from the macrophage migration inhibition factor test.

Clonazepam is widely used in neurology, cutaneous side-effects being uncommon. We now describe a case of erythema multiforme induced by clonazepam. The diagnosis of drug-induced erythema multiforme is based on the clinical data and is supported by a positive macrophage migration inhibition factor test against the preparation.