Roger Ricks is a 72 year old retired boxer with various medical problems and attends for his medication review. At the end of the consultation, he briefly mentions that both of his breasts have become enlarged in the past 12 months. There is no history of pain or discharge and he is systemically well. Examination shows bilateral enlargement and no localised swellings in keeping with gynaecomastia.

Which one of the following medications would not be associated with gynaecomastia?