A 72-year-old female pati...

A 72-year-old female patient presented with painful blisters on her back, shoulders, chest, and upper extremities, and thick yellowish crusty lesions on both lips. These symptoms have been present for the past 3 days. She has a medical history of hypertension and diabetes mellitus. According to the patient's history, the lesions appeared after taking a dose of Tab. Drotin DS for abdominal pain. What is the likely diagnosis for this case, and what treatment approach should be followed?