15th March 2024

A 56-year-old man presents to the general practitioner complaining of burning pain on micturition.

A 56-year-old man presents to the general practitioner complaining of burning pain on micturition. He has a history of hypertension and chronic kidney disease. On examination he is pyrexial with a temperature of 37.9°C, WCC 15.5 x 10⁹ /L , Urea 4 mmol/l, serum creatinine 113 umol/L, eGFR 13 mL/minute/1.73 m2. Urine dipstick is positive for leukocytes and nitrites. 

Prescribe one drug that should be administered to treat this patient.