29th February 2024

Mr Adams is a retired 72-year-old plumber who had a total hip replacement 8 days ago, following a neck of femur fracture.

Mr Adams is a retired 72-year-old plumber who had a total hip replacement 8 days ago, following a neck of femur fracture. He has a past medical history of type 2 diabetes, hypertension, gout and asthma.
The following blood tests have come back from the lab:

Hb 140 g/L (130-180 g/L)

WCC 8 x1012/L (4-11 x1012/L)

Platelets 358 (150-400)

Na 138 mmol/L (135-145 mmol/L)

K 5.5 mmol/L (3.5-5 mmol/L)

Urea 4 mmol/L (2.5-6.7 mmol/L)

Creatinine 80 μmol/L (70-150 μmol/L)

eGFR >90 mL/min/1.73m2 (>90 mL/min/1.73m2)

Which of the following medications is most likely to have caused the hyperkalaemia?