23rd February 2024

A 70 year old male attends his GP after noticing enlargement of both breasts.

A 70 year old male attends his GP after noticing enlargement of both breasts. He first noticed the change approximately 1 month ago however the problem has since worsened, prompting him to book a GP appointment. On examination there is an abnormal increase in the amount of breast tissue on both sides. There is no tenderness and no palpable masses. He has a past history of iron-deficiency anaemia, cardiac failure, hypothyroidism and depression.

From the following list of medications, which is the most likely medication to be causing his symptoms?