UTI Antibiotics: What to Know Before You Start

Understanding Urinary Tract Infections

A urinary tract infection (UTI) happens when bacteria get into the urinary system — most often the bladder, but sometimes the kidneys. UTIs are common, particularly in women. Typical symptoms include a burning sensation when passing urine, needing to urinate more often or urgently, cloudy or strong-smelling urine, and discomfort low in the abdomen. More serious signs — fever, back or side pain, chills, or blood in the urine — can suggest the infection has spread to the kidneys and need prompt attention.

When Antibiotics Help

UTIs are usually caused by bacteria, which is why antibiotics are often the right treatment. They work by killing or stopping the growth of the bacteria responsible. Many UTIs need antibiotics to clear properly, especially if symptoms are more than mild. The choice of antibiotic should always be guided by a doctor — different infections and patients call for different choices. You can see the antibiotics range for context.

Why Finishing the Course Matters

If you are prescribed antibiotics, finish the full course, even if you feel better after a day or two. Feeling better does not always mean every bacterium is gone. Stopping early can allow the infection to return and leave behind hardier bacteria, contributing to antibiotic resistance — a serious, growing problem. Using antibiotics correctly keeps them effective for everyone.

Take Them Correctly

• Take each dose at the times advised, spacing them as directed.
• Follow any instructions about food.
• Do not save leftover antibiotics or use someone else's.
• Read the patient information leaflet.

Common side effects can include an upset stomach, nausea or diarrhoea. If you develop a rash, swelling or difficulty breathing, seek urgent help.

Helping Yourself Alongside Treatment

Drink plenty of fluids, rest where you can, and use simple pain relief if appropriate — a pharmacist can advise, and you can see the pain range. These measures do not replace proper treatment when antibiotics are needed.

When to See a Doctor

Seek medical advice if symptoms are more than mild or do not improve within a couple of days; if you have a fever, back/side pain or blood in your urine; if you are pregnant; if you get UTIs repeatedly; or if the infection affects a child, older adult or anyone with a weakened immune system.

The Bottom Line

UTIs are common and often need antibiotics to clear properly. Take them correctly and finish the full course to protect both your recovery and the wider fight against antibiotic resistance. When in doubt, see a doctor. Browse shop all to understand what is available, but treatment decisions belong with a professional.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.