What to expect from antibiotic treatment for kidney infection

A kidney infection can cause fever, chills, pain in the side or back, nausea, and urinary symptoms. Antibiotics target the bacteria, but tiredness or soreness may take longer to settle than the fever. Your clinician may choose tablets or recommend hospital treatment through a vein when you are very unwell, pregnant, unable to keep fluids down, or need close monitoring. The choice depends on symptoms, examination, urine results, and medical history.

Take doses at the planned times and complete the course unless a healthcare professional changes it. Drink fluids if you can do so safely, rest, and use only suitable pain relief at the recommended dose. Do not use leftover antibiotics or share them. If you vomit soon after a dose, ask a pharmacist or clinician whether it should be repeated. A urine sample or other review may be needed if symptoms do not follow the expected path.

Get urgent medical help for confusion, fainting, severe weakness, difficulty breathing, a new widespread rash, or inability to keep fluids down. Seek prompt review if fever, side pain, or urinary symptoms are worsening, or if there is blood in the urine. A kidney infection can spread beyond the urinary tract, so do not wait for the course to finish when you feel markedly worse.

Ask when improvement should begin, whether your antibiotic needs adjustment for urine results, what pain relief is suitable, and whether a follow-up urine test is needed. Mention kidney problems, pregnancy, allergies, and regular medicines.