UTI treatment in Ireland: when antibiotics are needed

What a urinary tract infection is, and what it feels like

A urinary tract infection is a bacterial infection of the bladder or, less often, of the kidneys. The classic lower urinary tract picture is burning or stinging when passing urine, needing to go far more often than usual, a sudden urgency that is hard to hold, passing only small amounts, and a dull ache low in the abdomen. Urine may look cloudy or smell strong.

The reason this pattern matters is that it is reasonably specific. In a woman with no vaginal discharge or irritation, that combination of burning, frequency and urgency makes a bladder infection likely enough that Irish primary care often treats on the basis of symptoms rather than waiting for a urine culture.

What does not fit that picture should not be forced into it. Vaginal discharge, itch or soreness point elsewhere. Pain that has moved into the back or the side, with fever or shivering, points upwards to the kidney and is a different and more serious problem. Blood visible in the urine can occur with an infection but always needs a doctor to look at it rather than being assumed.

What helps before, and alongside, a prescription

Simple pain relief is the mainstay. Paracetamol taken at the dose on the pack eases the discomfort, and a pharmacist can advise on whether an anti-inflammatory is suitable for you, which depends on your kidneys, your stomach and what else you take.

Fluids matter, in the sense that being properly hydrated is sensible and passing urine regularly is comfortable. Drinking extreme volumes is not a treatment and can make you feel worse.

Urinary alkalinising sachets sold over the counter are a common purchase in Ireland. They may take the edge off stinging, but they should not be taken alongside nitrofurantoin, because that antibiotic depends on acidic urine to work properly. If you have been prescribed nitrofurantoin, ask the pharmacist before adding anything from the shelf.

Cranberry products are the question every patient asks. The evidence for preventing recurrent infections is mixed and modest at best, and there is no good evidence that they treat an established infection. If you take warfarin, discuss cranberry with a pharmacist before starting it.

None of this clears the bacteria. It makes an infection tolerable while a decision about antibiotics is made.

When antibiotics are actually needed

For a healthy non-pregnant woman with clear lower urinary tract symptoms, a short antibiotic course is the standard treatment and usually settles matters quickly. Some very mild cases do resolve without antibiotics, which is why a pharmacist or doctor may suggest waiting a day with pain relief where the symptoms are borderline, but that is a shared decision rather than a general rule.

Antibiotics are not optional where the picture is more serious or the person is more vulnerable. Fever, shivering, loin or flank pain, feeling generally unwell, or vomiting suggest the kidney is involved and need to be assessed by a doctor urgently rather than treated from a website.

Pregnancy changes the calculation entirely. Urinary infection in pregnancy, including infection found on a test without symptoms, is treated, and the choice of antibiotic is restricted. Pregnancy is a reason to see a doctor in person.

Men with urinary symptoms are treated differently again, because infection in men is not classified as uncomplicated and often involves the prostate, which changes both the antibiotic and the duration.

Catheters, recent urinary procedures, kidney stones, diabetes, immunosuppression and older age all move a case out of the simple category.

Why nitrofurantoin is usually the first choice in Ireland

Irish antimicrobial prescribing guidance names nitrofurantoin as the usual first-line antibiotic for uncomplicated lower urinary tract infection in women. Two things drive that choice. It concentrates in the urine, which is exactly where it is needed, and resistance rates among the common urinary bacteria in Ireland have stayed comparatively favourable, unlike some older alternatives.

The course is short. Duration is set by the prescriber according to current guidance and your circumstances, and the instruction on the prescription is the one to follow rather than a number remembered from a previous infection.

There are limits. Nitrofurantoin is not suitable where kidney function is significantly reduced, because it depends on being filtered into the urine to work. It is avoided at the very end of pregnancy. It commonly turns urine a dark yellow or brown colour, which is harmless and expected. Nausea is the most frequent complaint and taking it with food helps.

Where nitrofurantoin is unsuitable, other agents are used, and the choice depends on local resistance patterns, allergy history, pregnancy and kidney function. That is a prescribing decision, not a shelf decision.

Finishing the course as instructed matters. Stopping when symptoms settle is one of the routes by which resistant infections develop, and resistance is the reason this class of medicine is prescribed rather than sold.

Symptoms that need medical attention urgently

Arrange to be seen the same day, or go to an Emergency Department or A&E, if any of the following apply.

Fever above the level you would treat at home, shivering or shaking chills, or pain in the back or side rather than low in the abdomen. That combination suggests the kidney is involved.

Vomiting that stops you keeping fluids or tablets down.

Confusion or a sudden change in alertness in an older person, which can be the main presentation of infection in that age group and is easy to miss.

Visible blood in the urine, which needs to be examined even when an infection is the likely cause.

Symptoms during pregnancy, at any stage.

Symptoms that have not improved after a couple of days on an antibiotic, or that come back within days of finishing one.

Severe pain, a very rapid heartbeat or feeling frightened by how unwell you are. If someone is seriously unwell, call 112 or 999 rather than waiting for an appointment.

Infections that keep coming back

Recurrent infection is usually defined by the number of episodes in six or twelve months, and it is a different clinical problem from a single infection. It deserves an assessment rather than a series of separate prescriptions.

A doctor looking at recurrence will want urine cultures rather than symptom-based treatment, so that the actual organism and its sensitivities are known instead of guessed. That often changes the antibiotic.

Other factors get reviewed at the same time: bladder emptying, constipation, menopause and vaginal atrophy, sexual activity as a trigger, diabetes control, kidney stones and any structural issue that has been suspected before.

Preventive strategies exist, including behavioural measures, topical treatments after the menopause and, in selected patients, low dose antibiotic prophylaxis. All of these need a doctor who can see the whole picture and follow it over time, which is the definition of what a GP does and is not something a one-off online questionnaire can replace.

If you are having repeated infections, the most valuable thing you can do is register with a GP and get a proper work-up rather than treating each episode as a fresh emergency.

Where MEDINOW fits, and where it does not

A new urinary tract infection is a new clinical episode. It is not a continuation of treatment you were already on, and we do not treat it as one. Our repeat prescription assessment exists for medicines you are established on, and it is the wrong tool for an acute infection.

MEDINOW works from a written medical questionnaire read by a doctor in his own time. There is no video consultation, no telephone appointment and no live chat. That model is reasonable for reviewing a stable long-term medicine. It is not a good way to assess an acute infection, where the questions a doctor wants to ask depend on the answers to the last ones and where a urine sample may change the plan.

So for a new urinary infection in Ireland, the routes that work are your own GP, a GP out of hours service, or a pharmacist who can advise on symptom relief and tell you when the symptoms need a doctor.

What we can help with is different: if you take a long-term medicine and have run low while dealing with something else, our repeat prescription assessment at 19.90 euro covers that review. The fee covers the medical assessment and not the issuing of a document. If the doctor declines on medical grounds, the fee is refunded. If the doctor asks for documentation and you do not send it, the assessment counts as carried out and the fee is not refunded.

Who wrote this page

Written by the MEDINOW editorial team and reviewed by lek. Damian Wojno, a doctor registered in Poland, PWZ no. 3211301. He is not on the Irish Medical Council register. Reviewed on 29 August 2026.

This is general information about how urinary tract infections are assessed and treated in Ireland. It is not a diagnosis, it does not tell you which antibiotic you need, and it does not replace being seen by a doctor who can examine you and test your urine.

The treatment points here were checked against Irish antimicrobial prescribing guidance and HSE patient information rather than written from memory, and product specific detail such as duration and cautions was left to the prescriber and to the patient information leaflet instead of being fixed in a number on a web page. Antibiotic choice in Ireland changes with local resistance data, which is exactly why it belongs with a prescriber rather than in an article.