3rd July 2023

You are reviewing patients with the dermatology consultant on the wards. A 65-year-old female was recently admitted for a CAP

You are reviewing patients with the dermatology consultant on the wards. A 65-year-old female was recently admitted for a CAP and treated with IV amoxicillin and PO doxycycline. She has a history of epilepsy for which she takes sodium valproate. On examination, she has widespread redness of the skin, and it is warm to touch. There is some scaling over the areas of erythema. The patient is feeling generally unwell and is complaining of significant itching of the skin.

What is the most likely cause of the rash?

Select the SINGLE most appropriate option from the list below. Select ONE option only.