Derm Dx: Skin eruptions in a patient with peptic ulcer disease

A 67-year-old patient complains of stomach pain that is worsened by hunger and partially alleviated with eating. He is diagnosed with Helicobactor pylori induced peptic ulcer disease. Triple therapy with bismuth subcitrate potassium, metronidazole and tetracycline hydrochloride is started. He takes no other medications. Several days later the patient presents to the hospital with the skin eruption.