23rd June 2023

A 50-year-old woman sees her GP due to symptoms of dysuria and frequency.

A 50-year-old woman sees her GP due to symptoms of dysuria and frequency. Her urine dip is positive for leucocytes and nitrites, and she is started on oral antibiotics for a urinary tract infection. Routine bloods three days later show that her creatinine has risen from a baseline of 66 to 88 μmol/L. Repeat bloods two weeks later show that the creatinine has returned to baseline.

Which antibiotic could account for the results above?

Select the single most appropriate option from the list.