Why UTIs keep coming back and what to do when antibiotics aren’t working

Stories about antibiotics “no longer working” can sound frightening. For an individual patient, however, this does not necessarily mean that every antibiotic has stopped working or that nothing can be done.

It usually means the symptoms and previous treatment need to be reviewed properly. The infection may be resistant to a particular antibiotic, it may be a new infection, or the symptoms may have another cause. A news story cannot establish which explanation applies to you — that requires an individual medical assessment.

Why might UTI symptoms continue after antibiotics?

Antibiotic resistance occurs in bacteria, not in your body. Some bacteria can survive particular antibiotics, so a medicine that worked for an earlier infection may not treat the current one.

There are other possible explanations too:

• the antibiotic may not target the bacteria causing this episode
• the infection may have returned or a new infection may have developed
• the symptoms may come from another condition, such as a sexually transmitted infection, vaginal irritation, a urinary stone, prostate inflammation or bladder pain syndrome
• an underlying issue may be making infections more likely, such as difficulty emptying the bladder
• symptoms may persist for a short time even after treatment, although worsening or ongoing symptoms still need review

This is why repeatedly using the same antibiotic — particularly without a urine test or clinical review — may not solve the problem.

NICE defines recurrent UTI as two or more infections within six months, or three or more within 12 months. You do not need to wait until you meet that definition if symptoms have not cleared, are getting worse or keep returning.

What to do when an antibiotic has not helped?

Arrange a fresh medical review

Do not simply repeat an old prescription, take leftover antibiotics or use medicine prescribed for someone else. Arrange a GP review so the clinician can reconsider both the diagnosis and the treatment.

If you are currently taking an antibiotic, continue to take it as directed unless a clinician advises you to stop or change it. Seek advice promptly if you develop significant side effects, signs of an allergic reaction or worsening symptoms.

Be ready to explain the pattern

It can help to write down:

• when each episode started and how long it lasted
• your symptoms, including fever, back pain, vaginal symptoms or discharge
• the names and dates of antibiotics you have taken
• whether symptoms disappeared completely between episodes
• any previous urine culture results
• medicine allergies and significant side effects
• whether episodes seem connected with sex, pregnancy or menopause
• any history of kidney stones, prostate problems or difficulty passing urine

If you do not know which antibiotics you previously received, your NHS app, pharmacy or GP record may help.

Ask whether a urine culture is needed

A urine culture can identify bacteria in a sample and show which antibiotics they are likely to respond to. Where clinically appropriate, a clinician may ask for a sample before a new antibiotic is started. Do not delay urgent treatment or urgent care while trying to arrange a sample.

If a culture has already been taken, ask:

• whether bacteria were found
• whether the result suggests the prescribed antibiotic should work
• whether the treatment needs to change
• what follow-up is needed if symptoms continue

A negative urine result does not mean that the symptoms are imaginary. It may mean the clinician needs to look for a different explanation rather than prescribing repeated antibiotics.

What a GP may consider

A GP will usually ask about your symptoms, previous infections, medicines and relevant medical history. Depending on the circumstances, they may discuss:

• urine testing and culture
• a pregnancy test where relevant
• testing for sexually transmitted infections if symptoms or sexual history suggest this
• an examination, including consideration of vaginal or prostate-related causes
• whether you are emptying your bladder normally
• further tests or referral if infections are frequent, unusually severe or unexplained

Antibiotics are not automatically required for every urinary symptom. When they are appropriate, the choice should take account of factors such as previous results, allergies, pregnancy, kidney health and local prescribing guidance.

Using a private GP for recurrent UTI symptoms

If you are otherwise well but need a prompt assessment, DocTap offers same-day private GP appointments at multiple clinics across London. A GP can review the pattern of symptoms, decide whether testing or treatment is appropriate and provide a prescription where clinically justified. An appointment does not guarantee that an antibiotic will be prescribed.

A private GP may not have access to your complete NHS record, so bring details of previous treatments, test results, allergies and other medicines. If a urine culture, other test or onward referral is recommended, ask how it will be arranged, how you will receive the result and whether there are separate costs.

Private care should not delay NHS 111 or emergency care when warning signs are present. It is also sensible to keep your NHS GP informed when private treatment or testing may affect your ongoing care.

Can recurring UTIs be prevented?

The right approach depends on why infections are recurring. General measures that may help include:

• drinking enough fluid to pass pale urine regularly, unless you have been advised to restrict fluids
• avoiding regularly holding in urine for long periods
• urinating after sex
• wiping from front to back after using the toilet
• avoiding fragranced products that irritate the genital area

These steps cannot prevent every infection. Supplements and over-the-counter cystitis products should not replace medical assessment when symptoms are persistent or recurrent, and some products can interact with medicines.

Depending on your circumstances, a clinician may discuss additional preventive options, such as vaginal oestrogen after menopause or a clinician-supervised preventive prescription treatment. These approaches are not suitable for everyone and should follow an individual review of the likely benefits, risks and previous test results.

The practical next step

If symptoms have returned repeatedly or have not improved after antibiotics, arrange a GP appointment rather than trying another unreviewed course. Bring your treatment history, ask whether a urine culture is appropriate and agree on how results will be followed up.

Most importantly, seek urgent help if you develop fever, pain beneath the ribs, vomiting, confusion or feel seriously unwell. Persistent urinary symptoms deserve proper investigation, even when previous tests or treatments have not provided a clear answer.

When to seek urgent help

Contact a GP urgently, NHS 111 or your local out-of-hours service if you have possible UTI symptoms alongside:

• a high or very low temperature, or feeling hot, cold and shivery
• pain in your back or side, particularly beneath the ribs
• vomiting or being unable to keep fluids down
• blood in your urine
• rapidly worsening symptoms or feeling very unwell
• symptoms that are not starting to improve within 48 hours of beginning treatment

You should also seek prompt medical advice if you are pregnant, are a man, have a urinary catheter, have diabetes or a weakened immune system, or are aged 65 or over. These circumstances can affect how urinary symptoms should be assessed and managed. The NHS guidance on UTIs provides further advice about urgent symptoms.

Call 999 if someone is severely unwell and becomes confused, very drowsy or has difficulty speaking. These can be signs of a serious infection and should not wait for a routine appointment.