E. multiforme may be caused by drug reactions , most commonly , phenytoin , barbiturates , penicillin or , allopurinol .
E. multiforme may also be caused by drug reactions , most commonly Sulfa drugs , phenytoin , barbituates , pencillin , allopurinol , or a host of internal ailments.de : Erythema multiforme
Erythema multiforme