There is currently no cure for IBS, but for most people the symptoms can be brought under control. Treatment in the UK follows steps. Diet and lifestyle changes come first, then medicines matched to your main symptom, and if symptoms persist, low-dose antidepressants or psychological therapies aimed at the gut. IBS affects between 1 in 10 and 1 in 5 people in the UK, so this is a pathway GPs know well. This guide covers the treatments the NHS recommends, the medicines used for pain, diarrhoea and constipation, and the therapies with the strongest evidence behind them.
What IBS Treatments are there?
IBS treatments fall into three groups. Diet and lifestyle changes, medicines that ease individual symptoms, and psychological therapies that work on the connection between the gut and the brain. The NICE guideline on IBS recommends trying them broadly in that order, and many people get enough relief from the early steps alone.
IBS affects everyone differently, so finding the right combination usually takes some trial and error, and what works for one person may do nothing for another. The 2021 British Society of Gastroenterology guideline describes IBS as a disorder of gut-brain interaction rather than a purely digestive problem, which is why treatments as different as an antispasmodic tablet and a course of talking therapy can both work. If you are still working out whether your symptoms are IBS in the first place, our complete guide to IBS covers symptoms, causes and how it is diagnosed.
Diet and lifestyle changes
Diet is the first thing a GP will ask about, and for many people it is where the biggest gains are. NHS advice starts with regular meals, at least 1.5 litres of fluid a day, and limiting caffeine, alcohol and fizzy drinks. Fibre usually needs adjusting rather than simply increasing. A 2017 review found that soluble fibre, such as oats and ispaghula, improves overall IBS symptoms, while some other fibre types ferment quickly in the gut and make bloating and wind worse.
Stress also feeds directly into IBS. Research shows the gut is in constant two-way communication with the brain, and many people notice their symptoms flare when life gets harder, so regular exercise, relaxation time and decent sleep all earn their place alongside the food changes. Stress sits alongside the other common triggers that can set off an IBS flare-up.
Diet for IBS is a big enough subject to need its own guide. Our medical guide details and compares the best diets to manage IBS, including the low FODMAP diet, how to identify trigger foods, and why an elimination approach should only be tried with proper support.
Medicines from the pharmacy
Several IBS medicines can be bought from a pharmacy without a prescription. NHS advice is to tell the pharmacist your main symptom and let them recommend the right option, and to see a GP if pharmacy medicines are not helping. Your main symptom is also what defines which IBS subtype you have, whether that is IBS-C, IBS-D or IBS-M.
- Antispasmodics. Medicines such as hyoscine butylbromide (Buscopan) and mebeverine relax the muscle in the bowel wall, easing cramps and spasms. NICE recommends considering them alongside diet and lifestyle advice, taken when symptoms flare rather than every day.
- Peppermint oil capsules. Peppermint oil relaxes the gut muscle in a similar way. In a 2020 analysis of 51 trials covering more than 4,600 people, peppermint oil ranked first among the traditional IBS treatments for improving overall symptoms, and a 2026 review pooling seven trials reached the same conclusion, although many of the underlying trials were small.
- Loperamide. For diarrhoea, the NHS names loperamide (Imodium) as the first-choice option. It slows the movement of the bowel so stools become firmer and less urgent.
- Laxatives. For IBS with constipation (IBS-C), certain types of laxatives help, and soluble-fibre products such as ispaghula husk (Fybogel) are the usual starting point. NICE advises against lactulose for IBS because it can make bloating worse.
None of these suits everyone. A pharmacist can check whether a medicine fits alongside anything else you take, and both laxatives and loperamide need adjusting to your response rather than taking at a fixed amount indefinitely, which is something the pharmacist or your GP will explain.
Medicines your GP may prescribe
If diet changes and pharmacy medicines have not helped, a GP has further options, and this is the point where NHS advice is to book an appointment rather than keep experimenting alone. If you have read about SIBO and antibiotic treatment, the relationship between SIBO and IBS, and how it is investigated in the UK, is more complicated than it first appears.
Low-dose antidepressants. A GP may suggest a tricyclic antidepressant such as amitriptyline, prescribed for IBS at a much lower dose than is used for depression. At low doses these medicines calm the nerve signalling between the gut and the brain rather than acting on mood. The evidence here is strong and recent. In the largest trial of its kind, published in The Lancet in 2023, 463 people across 55 GP practices in England took low-dose amitriptyline or a placebo for six months. The amitriptyline group improved significantly more, side effects were mostly mild, and the researchers concluded GPs should offer it when first-line treatments have not worked. Some people are offered an SSRI antidepressant instead. Both are prescription decisions made with your GP, reviewed regularly, and never medicines to start or stop on your own.
Linaclotide. For people whose constipation has lasted a year or more and has not responded to different classes of laxative, NICE recommends GPs consider linaclotide, a prescription medicine that increases fluid secretion in the bowel.
Gut-directed psychological therapies
NICE recommends considering psychological therapy when IBS symptoms have not responded to medicines after 12 months. These therapies target the gut-brain connection rather than your mood, and the trials behind them are among the strongest in the whole of IBS research.
Cognitive behavioural therapy (CBT) adapted for IBS teaches practical ways to change the thought and behaviour patterns that feed symptom flares. In the ACTIB trial, 558 people in the UK whose IBS had persisted despite first-line treatment received CBT by telephone, CBT through a website, or usual care. A year later, both CBT groups had clearly better symptom scores than usual care, and the benefit held whether the therapy was delivered by phone or online.
Gut-directed hypnotherapy uses guided relaxation focused on calming the gut. In the IMAGINE trial of 354 people, those who received six hypnotherapy sessions were more likely to report adequate relief of their symptoms than those given supportive education, and group sessions worked as well as one-to-one treatment. Access to both therapies on the NHS varies by area, so ask your GP what is available locally.
Can a gut microbiome test help?
The gut bacteria of people with IBS often differ from the gut bacteria of people without it. A 2019 systematic review of 24 studies found several bacterial groups consistently raised or lowered in people with IBS, although studies cannot yet say whether these differences cause IBS or result from it. Research reviews suggest an imbalance in gut bacteria may contribute to symptoms in some people.
A gut microbiome test kit profiles the bacteria in a stool sample with shotgun metagenomic sequencing, a method that identifies thousands of bacterial species from their DNA and shows how your balance compares with a healthy one. A test does not diagnose IBS, and it is not a substitute for seeing your GP, who can rule out other conditions with blood tests. What it can show is whether your gut bacteria are out of balance, which is useful context when you are working through treatment options with a clinician. Our page on gut microbiome testing for IBS explains what a test can and cannot tell you.
Is there an IBS cure?
No. IBS is usually a long-term condition, and nothing available today removes it permanently. That is less bleak than it sounds. Symptoms tend to come and go rather than staying constant, and most people who work through the steps above find a combination that keeps flare-ups manageable and rare.
Because IBS varies so much from person to person, the combination is personal. Some people need nothing beyond diet changes, some rely on an antispasmodic during flares, and some do best with a low-dose antidepressant or a course of CBT. Identifying your own triggers, with a symptom diary if it helps, is what turns the general pathway into a plan that works for you.
What about live cultures, acupuncture and other therapies?
Live culture supplements. Supplements containing live bacteria, widely sold as probiotics, are heavily marketed for IBS. A 2023 analysis of 82 trials involving more than 10,000 people found some strains may improve overall symptoms, but the certainty of the evidence was low and it is not yet possible to say which product to choose. They appear safe, and NHS advice is that if you want to try one, take it for a month and stop if it makes no difference.
Acupuncture and reflexology. NICE advises that neither should be encouraged for IBS, because the evidence does not show a reliable benefit over placebo. The same guideline discourages aloe vera. Money spent here is usually better spent on the approaches above.
When should you see a GP?
See a GP if you think you have IBS and your symptoms have lasted more than four weeks, or if you have already been diagnosed and diet changes and pharmacy medicines are not helping. There is no single test for IBS. A GP diagnoses it from your symptoms and rules out other conditions with blood tests, including a check for coeliac disease, so a proper diagnosis matters before settling into long-term treatment.
Some symptoms need urgent attention rather than a routine appointment. Ask for an urgent GP appointment or contact NHS 111 if you have lost weight without trying, you are bleeding from your bottom or passing bloody diarrhoea, you can feel a hard lump or swelling in your tummy, or you feel breathless and unusually pale with a noticeable heartbeat, which can be signs of anaemia. Also book to see your GP if a change in your bowel habit has persisted beyond three weeks, or if bowel symptoms start for the first time when you are over 50. These symptoms usually turn out to have ordinary explanations, but they are the ones that must be checked, as the NHS symptom guidance sets out.
Sources
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