What should you know about most common cause of steven johnson syndrome?

Stevens-Johnson syndrome is an uncommon but dangerous reaction in which the immune system attacks the skin and mucous membranes. It often follows a new prescription or a dose change, although the timing can vary. The mouth, eyes, and genital area may be affected as well as the skin. A rash can begin with fever, sore throat, burning eyes, or tenderness before blisters, peeling, or raw areas appear. The suspected trigger may be recorded as a [Drug Rash](/conditions/drug-eruption/), but a clinician must assess the full pattern.

If this reaction is suspected, stop trying to manage it at home and seek emergency medical care immediately. Take the medicine packets or an accurate medication list, including non-prescription products and recent changes. Do not restart a suspected medicine unless a specialist specifically instructs you. Hospital care may include fluids, wound care, pain control, eye assessment, and treatment of complications. Medicines such as [Oral Corticosteroid Treatment](/treatments/medical-dermatology/oral-corticosteroid-therapy/) are decisions for the treating team, not self-treatment.

Go to an emergency department urgently for widespread skin pain, blistering, peeling, new sores in the mouth or eyes, trouble swallowing, breathing difficulty, faintness, or fever with a rapidly changing rash. Do not wait for a routine dermatology appointment. Eye symptoms need especially quick attention because inflammation can threaten vision.

Which medicine is the likely trigger, and which related medicines should I avoid? How will the reaction be documented for future prescriptions? Do my eyes or other mucosal areas need specialist review? What symptoms require immediate reassessment after discharge?