Pediatric patient experiences severe cutaneous adverse reaction

A 13-year-old boy with no history presented after 4 days of progressively worsening whole body rash.
Nine days before presentation, the patient’s mother reported that he had experienced low-grade fever, runny nose, chills, sore throat and muscle pain that were managed with supportive measures including ibuprofen, acetaminophen, fluticasone propionate nasal sprays, guaifenesin, doxylamine succinate and dextromethorphan. Perioral lesions were first noted 4 days before presentation, followed by widespread involvement of the face, chest and arms 1 day prior. He had no ocular history.
On initial