Picture of Dermatitis Medicamentosa (Back)
Dermatitis medicamentosa is a type of dermatitis that arises due to a drug reaction. The skin rash looks red (erythematous) and swollen (edematous). The most common medications that trigger this type of reaction are cephalosporins, codeine, and penicillin. The case in this picture clinically resembles erythema multiforme.
Text Reference: "Inflammatory Disorders of the Skin." Foundations and Adult Health Nursing.