5th March 2024

A 62-year-old man presents to his GP for an annual medication review.

A 62-year-old man presents to his GP for an annual medication review. He is otherwise well in himself but is found to have an electrolyte abnormality on his routine blood tests.

PMH. Hypertension, T2DM, chronic constipation, asthma. DH. See below.

Investigations

Na+ 137 mmol/L (137 – 144)

K+ 5.8 mmol/L (3.5 – 5.3)

U 6.1 mmol/L (2.5 – 7.0)

eGFR >60 ml/min/1.73 m2 (>60)

Select the ONE prescription that is most likely to be contributing to this patient’s hyperkalaemia.