Treating Inflammatory Bowel Disease with Mesalazine

Inflammatory bowel disease (IBD) is a group of chronic conditions in which the digestive tract becomes inflamed.

The two main forms are ulcerative colitis, which affects the lining of the large bowel and rectum, and Crohn's disease, which can involve any part of the gut.

Symptoms tend to come and go in flares, with quieter periods of remission in between.

Because the inflammation is long-term, the aim of treatment is not a one-off cure but steady control: settling an active flare and then keeping the bowel calm over the long run.

Mesalazine, also known as 5-aminosalicylic acid or 5-ASA, is a cornerstone treatment for mild to moderate ulcerative colitis and is sometimes used in mild Crohn's disease affecting the colon.

Rather than acting on the whole body, it works directly on the surface of the bowel wall, which helps explain its generally mild side-effect profile.

IBD is different from irritable bowel syndrome (IBS); IBS does not cause the visible inflammation or tissue damage seen in IBD.

If you have ongoing diarrhoea, blood in your stool, abdominal pain or unexplained weight loss, you should be assessed by a doctor, as a proper diagnosis usually involves stool tests, blood tests and a look inside the bowel.

Mesalazine is an anti-inflammatory medicine that targets the lining of the bowel rather than the whole body.

By reducing inflammation where it occurs, it helps relieve symptoms such as diarrhoea, cramping and rectal bleeding, and it lowers the chance of a flare returning. Treatment generally has two phases.

In the induction phase, a higher dose is used to bring an active flare under control. Once symptoms settle, a lower maintenance dose is continued to keep the disease in remission.

Mesalazine comes in several forms so that the medicine can be delivered to the right part of the bowel: tablets and slow-release granules for inflammation higher up the colon, and suppositories or enemas for disease limited to the rectum and lower bowel.

Some people use an oral form together with a rectal form.

It is important not to stop maintenance treatment once you feel well, because continuing it is what keeps the bowel calm and reduces the long-term risk of complications.

Your doctor decides the dose and form based on where the inflammation is, how severe it is and how you respond. Kidney function is usually checked before and during long-term use.

The symptoms of inflammatory bowel disease depend on which part of the gut is affected and how active the disease is.

Common signs of ulcerative colitis include frequent or urgent diarrhoea, blood or mucus in the stool, cramping lower abdominal pain and a feeling of incomplete emptying.

Crohn's disease may also cause pain, diarrhoea, tiredness and weight loss, and it can affect areas beyond the bowel such as the joints, skin and eyes.

A flare is a period when inflammation increases and symptoms worsen, often after a stretch of feeling well.

Recognising the early signs of a flare, such as more frequent stools or returning blood, allows you to seek advice promptly so treatment can be adjusted before things get worse.

Certain warning signs need urgent medical attention: heavy or persistent rectal bleeding, severe abdominal pain, high fever, signs of dehydration or rapid weight loss.

Keeping a simple record of your symptoms, including stool frequency and any bleeding, can help you and your doctor judge whether your current treatment is working or needs to change.

While medication is the main way to control inflammatory bowel disease, day-to-day habits can help you feel more in control between flares.

The single most important factor is taking your medication consistently, even when you feel well, as missed doses are a common reason for flares to return.

There is no single diet that suits everyone with IBD, but many people find it helpful to notice which foods seem to worsen their symptoms and to eat smaller, regular meals during a flare.

Staying well hydrated matters, particularly if diarrhoea is frequent.

Stress does not cause IBD, but it can make symptoms feel worse, so approaches such as regular sleep, gentle exercise and relaxation techniques are worth building into your routine.

Smoking has a particularly negative effect in Crohn's disease, so stopping is strongly advised.

It is also sensible to keep up with the monitoring your doctor recommends, including periodic kidney function checks during long-term mesalazine use.

If your symptoms change, your treatment is not helping, or you are planning a pregnancy, speak with a doctor so your care can be reviewed.