[Allergic reaction to melphalan].

The most common side effects of melphalan administration include nausea, vomiting, and bone marrow suppression. Less well known is the fact that allergic reactions can become evident after both intravenous and oral melphalan administration. In the present study we report a patient with a plasmocytoma, who developed an allergic reaction with melphalan intravenously, but tolerated melphalan orally.