History of drug exposure
Prodrome of malaise and fever
Positive Nikolsky sign
Oral, ocular, and/or genital mucositis with painful erosions
Necrosis and sloughing of the epidermis
Diagnosis is made my skin biopsy
SJS vs<unk> 
SJS - skin detachment of <10% of BSA<unk>  – skin detachment of >30% of BSA
SJS - skin detachment of <10% of BSA<unk>  – skin detachment of >30% of BSA
Toxic epidermal necrolysis
Toxic infectious erythemas
Contact dermatitis
Exfoliative drug eruptions
Bullosis diabeticorum
Primary blistering disorders
Dermatitis herpetiformis
Stevens-Johnsons syndrome