Roy, age 13, was recently diagnosed with epilepsy and prescribed carbamazepine for control of his seizures. He has developed erythematous papules, dusky appearing vesicles, purpura, and target lesions that have erupted rapidly and are more centrally distributed on the face. He has hemorrhagic crusts on his lips. He tells you his skin feels tender and burns. Additionally, he has developed exudative conjunctivitis. These findings are indicative of: 1. Urticaria. 2. Pemphigus vulgaris. 3. Herpetic gingivostomatitis. 4. Stevens-Johnson syndrome (SJS). 6 of 10 Questions