6th June 2025

A 69-year-old female presents with hyperpigmentation on her face.

A 69-year-old female presents with hyperpigmentation on her face. She has a history of dementia, osteoarthritis, hypertension, and diabetes mellitus. She was recently started on a medication which is when she noticed the hyperpigmentation. However, she does not know which medication it was. Her medications include donepezil, metformin, ramipril, amlodipine, gliclazide and naproxen.  What is the most likely medication causing hyperpigmentation?  

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