<prompt> Erythema nodosum can be seen with:OC pillsBarbituratesACE inhibitorsSulfonylureas  <response>: Etiology of erythema nodosum Infections: e.g., Streptococcal, Fungal, Mycobacterial, Yersinial. Drugs: e.g., Sulfas, Penicillins, Oral contraceptives. Sarcoidosis Idiopathic causes 