What to expect from antibiotic treatment for urinary tract infection

A clinician may use your symptoms, urine testing, pregnancy status, kidney health, allergies and previous infections to choose an antibiotic. A bladder infection and a kidney infection need different levels of assessment. Antibiotics do not treat every cause of urinary discomfort, so ongoing symptoms deserve review rather than repeated self-treatment.

You may still feel frequency, pressure or discomfort at first. If the infection has moved towards the kidneys, fever, chills, side or back pain and vomiting can occur and need more urgent care.

Take the medicine at the instructed times and complete the course unless the prescriber tells you to change it. Drink normally unless you have been given a fluid restriction. Do not use leftover antibiotics or someone else's prescription, and tell the clinician if symptoms are not beginning to settle.

Ask about pain relief that is suitable for you, especially with kidney disease, pregnancy or other medicines. Report rash, swelling, severe diarrhoea or breathing difficulty after a dose. A follow-up urine test may be advised for pregnancy, recurrent infections or persistent symptoms.

Seek urgent medical assessment for fever with chills, pain in the back or side, repeated vomiting, confusion, faintness, or feeling rapidly more unwell. Prompt review is also needed for visible blood in urine, inability to pass urine, pregnancy with urinary symptoms, or symptoms that persist or return after treatment.

Ask whether a urine sample is needed, when symptoms should improve, what to do after a missed dose, which side effects matter, and whether sexual activity, pregnancy or recurrent infections change your follow-up.