Digestive
Medicines for Diverticular disease
A very common condition in which small pouches form in the wall of the large bowel — often causing no problems at all, but sometimes leading to tummy symptoms or, if a pouch becomes inflamed or infected, an episode of diverticulitis that may need antibiotics and, occasionally, urgent care.
Education and reference only. This explains which medicines are used and why, in plain language — it deliberately contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician, and check the BNF and the product labelling for prescribing detail.
Quick answer
What is Diverticular disease?
Diverticular disease describes small bulging pouches, called diverticula, that develop in the wall of the colon, the main part of the large bowel. They become more common with age and are very widespread, particularly in later life.
- How it is treated: How diverticular disease is managed depends on whether the pouches are simply present, causing day-to-day symptoms, or actively inflamed.
- Self-care: A diet high in fibre — from wholegrains, fruit, vegetables and pulses — built up gradually and supported by plenty of fluids, along with regular physical activity, a healthy weight and not smoking, helps keep the bowel comfortable and reduces the likelihood of flare-ups.
- When to seek help: See your GP if you have persistent lower tummy pain, a lasting change in your bowel habit, or symptoms you think may be due to diverticular disease, so the cause can be assessed and a long-term plan agreed.
What it is
Diverticular disease describes small bulging pouches, called diverticula, that develop in the wall of the colon, the main part of the large bowel. They become more common with age and are very widespread, particularly in later life. Simply having these pouches, with no symptoms, is known as diverticulosis and is often discovered by chance during tests for something else. In some people the pouches cause symptoms such as cramping pain, usually in the lower left side of the tummy, bloating, and changes in bowel habit, and this is termed diverticular disease. A separate problem arises when one or more pouches become inflamed or infected, called diverticulitis, which typically causes more constant lower left tummy pain, often with a fever and feeling unwell. Most of the time diverticular disease is a long-term but manageable condition, and a good intake of fibre and fluids is central to keeping the bowel comfortable and reducing flare-ups.
How it is treated
How diverticular disease is managed depends on whether the pouches are simply present, causing day-to-day symptoms, or actively inflamed. For diverticulosis and ongoing symptoms, the cornerstone is a diet rich in fibre together with plenty of fluids to keep stools soft and the bowel moving comfortably, and a gentle bulking laxative is sometimes used to help with this. Pain and bloating are managed with simple measures and pain relief, choosing options that do not upset the bowel. When a flare-up of diverticulitis occurs, treatment is guided by how unwell the person is: milder episodes may settle with rest, fluids and simple care, while episodes thought to involve infection are treated with antibiotics, sometimes a combination that covers the range of bacteria found in the bowel. More severe attacks, or signs of complications, need assessment in hospital and occasionally surgery. Throughout, the aim is to relieve symptoms, treat flare-ups properly and reduce the chance of further episodes, with diet remaining the long-term foundation.
For this condition, these medicines
Medicine classes used for Diverticular disease
Each links to a full, dose-free guide — what it is, how it works, who can and cannot use it, side effects, interactions and FAQs.
Symptom checker
Symptoms that can point to Diverticular disease
Diverticular disease can be one cause of these symptoms. Each guide explains the other possible causes and the red-flag warning signs that mean you should get urgent help:
Beyond medication
Lifestyle and self-care
A diet high in fibre — from wholegrains, fruit, vegetables and pulses — built up gradually and supported by plenty of fluids, along with regular physical activity, a healthy weight and not smoking, helps keep the bowel comfortable and reduces the likelihood of flare-ups.
When to get help
When to see a doctor
See your GP if you have persistent lower tummy pain, a lasting change in your bowel habit, or symptoms you think may be due to diverticular disease, so the cause can be assessed and a long-term plan agreed. Seek prompt medical advice if you develop more constant lower left tummy pain with a fever or feeling unwell, as this can be an episode of diverticulitis that may need antibiotics. Seek urgent or emergency care if you have severe tummy pain, a high fever with shivering, significant bleeding from the back passage, or a tummy that becomes rigid and very painful to touch, as these can signal a serious complication such as a perforation or widespread infection that needs treating without delay. Any new bleeding from the back passage should always be checked.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
Answers
Diverticular disease: frequently asked questions
What medicines are used for diverticular disease?
For diverticular disease that is simply causing day-to-day symptoms, the focus is on diet rather than medicines, with a high-fibre intake and plenty of fluids, and sometimes a gentle bulking laxative to keep stools soft; simple pain relief is used for discomfort. When a flare-up of diverticulitis occurs and is thought to involve infection, antibiotics are used — often a penicillin-based option such as co-amoxiclav, sometimes combined with metronidazole to cover the range of bacteria found in the bowel. Milder flare-ups may settle with rest and fluids without antibiotics, while more severe episodes need hospital care. A doctor will decide whether antibiotics are needed based on how unwell you are.
What is the difference between diverticulosis, diverticular disease and diverticulitis?
They describe a spectrum of the same underlying feature — small pouches in the wall of the large bowel. Diverticulosis simply means the pouches are present without causing any symptoms, and is often found by chance. Diverticular disease means the pouches are causing symptoms such as cramping tummy pain, bloating or changes in bowel habit. Diverticulitis is different again: it means one or more pouches have become inflamed or infected, typically causing more constant lower left tummy pain often with a fever and feeling unwell. The distinction matters because each is managed differently, from diet and simple measures through to antibiotics or, occasionally, hospital treatment.
Does diet help diverticular disease?
Yes — diet is central to managing diverticular disease. A good intake of fibre from wholegrains, fruit, vegetables and pulses, built up gradually and supported by plenty of fluids, helps keep stools soft and the bowel moving comfortably, which eases symptoms and may reduce flare-ups. Older advice to avoid foods such as nuts, seeds and popcorn is no longer generally recommended for most people. During an acute flare-up of diverticulitis, however, your doctor may suggest resting the bowel with a lighter diet for a short time before returning to your usual fibre intake. Your GP or a dietitian can help you adjust your diet sensibly.
Is diverticular disease serious?
For most people it is not. Many have the pouches without ever knowing, and where symptoms do occur they can usually be managed well with diet and simple measures. The condition becomes more serious when a pouch becomes inflamed or infected, causing diverticulitis, or when complications develop such as an abscess, bleeding or, rarely, a perforation of the bowel wall. These need prompt medical attention, which is why it is important to seek help for severe tummy pain, a high fever, significant bleeding from the back passage or a rigid, very painful tummy. With good day-to-day management and timely treatment of flare-ups, most people live comfortably with diverticular disease.
Sources
Where this is drawn from
- NICE NG147: Diverticular disease — diagnosis and management.
- NICE CKS: Diverticular disease and diverticulitis.
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