The torso and proximal extremities are the most common locations for cutaneous drug reactions. This patient has the typical rash characterized by red papules coalescing to plaques.

Severe drug reaction. Rash often starts on torso and can progress to full-body redness (erythroderma).

The penis is a common location for a fixed drug reaction. Sometimes they are bullous, causing deep erosions as seen in this patient.

Thiazide diuretics can produce a photosensitive drug eruption characterized by red edematous plaque with ill-defined borders on a sun-exposed surface.