Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) may be associated with a preceding history of medication use, most commonly anticonvulsants, antibiotics, and nonsteroidal anti-inflammatory drugs. Other associated factors include infections.
The patient may present with Nikolsky sign, where the epidermal layer easily sloughs off when pressure is applied to the blistered or erythematous area.
Diagnosis is made by clinical presentation and confirmed with skin biopsy.
On diagnosis the offending medication should be stopped. Management is then supportive.
Patients do best if they are sent to a burn center for wound care as soon as the diagnosis is suspected or made.
The majority of SJS patients recover (mortality 1% to 5%). SJS can recur either with the same medication or with another medication.
TEN has a higher mortality (25% to 30%).
In the long term, patients should ensure they are not re-exposed to the trigger medication and be careful of self-medicating. They should avoid sunlight during healing and moisturize their skin.
Currently, patients at risk may need HLA screening if they are to receive medications such as carbamazepine, allopurinol, or trimethoprim/sulfamethoxazole.
Stevens-Johnson syndrome (SJS) is a severe skin detachment with mucocutaneous complications.  It is an immune reaction to foreign antigens. SJS is a more severe form of erythema multiforme major and a less severe manifestation of toxic epidermal necrolysis (TEN).  Classification is dependent on the percentage of skin involvement: SJS has <10% total body surface area (TBSA) involvement; SJS/TEN overlap has 10% to 30% TBSA involvement; and TEN has >30% TBSA involvement.       
Department of Surgery
Rush University Medical Center
AK-V has received compensation for reviewing manuscripts for Rubriq from Research Square on a variety of topics, including erythema multiforme, Stevens-Johnson syndrome and toxic epidermal necrolysis. She is also a manuscript reviewer for several journals, without renumeration.
Director Burn Unit
Department of Surgery
University of Iowa Hospitals
BAL declares that she has no competing interests.
Assistant Chief of Burns
TP declares that she has no competing interests.
Department of Dermatology
West Suffolk Hospital
Bury St. Edmunds
VG declares that he has no competing interests.
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