Answer:
lamotrigine, carbamazepine, phenytoin, phenobarbitone. Allopurinol, especially in doses of more than 100 mg per day. Sulfonamides: cotrimoxazole, sulfasalazine.
Step-by-step explanation:
The drugs that most commonly cause Stevens-Johnson syndrome/toxic epidermal necrolysis are: Anticonvulsants: lamotrigine, carbamazepine, phenytoin, phenobarbitone. Allopurinol, especially in doses of more than 100 mg per day. Sulfonamides: cotrimoxazole, sulfasalazine.