Ulcerative Colitis Treatment: A Patient Guide

Ulcerative colitis treatment aims to reduce inflammation in the large intestine and to bring on and maintain remission, using medicines matched to how severe the disease is, with surgery to remove the colon and rectum reserved for cases that medicines cannot control (1).

Ulcerative colitis (UC) is a lifelong inflammatory bowel disease that affects the inner lining of the colon and rectum. There is no single pill that works for everyone, but there are now many effective options. This guide walks through the goals of treatment, the main medicine classes from mildest to strongest, when surgery is considered, and how your care team monitors you over time. If you are still sorting out which diagnosis you have, our overview of Crohn's disease vs ulcerative colitis explains the key differences.

Key Takeaways

• The two goals of treatment are to induce remission (calm an active flare) and to maintain remission (keep symptoms away long term), reducing inflammation in the large intestine (1).
• Aminosalicylates (5-ASAs) such as mesalamine and sulfasalazine are the usual first step for mild to moderate UC and for staying in remission (2).
• Corticosteroids work fast for flares but are meant for short-term use only, not long-term control, because of serious side effects (2).
• Biologics (including anti-TNF agents, vedolizumab, ustekinumab, and mirikizumab) and oral small molecules (JAK inhibitors and S1P receptor modulators) are used for moderate to severe disease (2).
• Surgery to remove the colon and rectum is considered curative for ulcerative colitis, because removing the affected organ eliminates the disease (3).
• Because long-standing colon inflammation raises colorectal cancer risk, guidelines recommend starting surveillance colonoscopy about 8 to 10 years after diagnosis (4).

Treatment Goals

Doctors prescribe medicines to "reduce inflammation in the large intestine and to help bring on and maintain remission," and they choose treatments based on how severe the disease is and how much of the colon is involved (1).

In practice this means two things. First, inducing remission: getting an active flare under control so that symptoms like bloody diarrhea, urgency, and cramping settle down. Second, maintaining remission: keeping you well over months and years so flares become rare.

A modern goal that goes beyond how you feel is mucosal healing, meaning the lining of the colon looks healed when viewed during a colonoscopy, not just that symptoms have eased. Aiming for healed tissue, rather than symptom relief alone, is associated with better long-term outcomes and is why your doctor may recheck the colon even when you feel fine.

Treatment Options by Severity

UC treatment is often described as a ladder. Milder disease usually starts on the lower rungs, and stronger therapies are added or substituted if those do not work or if disease is moderate to severe from the start.

Aminosalicylates (5-ASA)

Aminosalicylates, also called 5-ASAs, contain 5-aminosalicylic acid and reduce inflammation in the lining of the intestine. They are primarily used to induce and maintain remission in mild to moderate ulcerative colitis (2). Common types include sulfasalazine and mesalamine. Depending on the specific drug, they can be taken by mouth or given rectally as enemas or suppositories, which is useful when inflammation is limited to the lower colon and rectum. They are generally well tolerated and are not linked to an increased risk of infections or cancer (2). People with a sulfa allergy should not take sulfasalazine (2).

Corticosteroids

Corticosteroids, often just called steroids, are powerful, fast-acting anti-inflammatory medicines used to treat moderate to severe UC or mild to moderate disease that does not respond to aminosalicylates (1)(2). Common examples are prednisone and budesonide. They are best suited for short-term control of a flare and should not be used as primary therapy for long periods (2). NIDDK notes that doctors "typically don't prescribe corticosteroids for long-term use" because of serious side effects (1). Possible side effects include high blood sugar, weakened bones, cataracts, weight gain, mood changes, and a higher infection risk, so doctors taper the dose down once a flare is controlled (2).

Immunomodulators

Immunomodulators change how the immune system works to reduce inflammation, and a doctor may use them when other medicines do not control the disease well (2). Common ones for inflammatory bowel disease include azathioprine, 6-mercaptopurine (6-MP), and methotrexate (2). They can take 3 to 6 months to take full effect, so a faster-acting medicine such as a steroid or a biologic may be used at the same time (2). People on these medicines should stay up to date on recommended vaccinations (2).

Biologics

Biologics are laboratory-made antibodies that target specific proteins driving the inflammation in IBD (2). They are prescribed for moderate to severe ulcerative colitis and to help maintain remission (1). Main types used in UC include:

• Anti-TNF agents (such as infliximab, adalimumab, and golimumab), which block tumor necrosis factor, a protein that fuels inflammation. They are given by injection or intravenous infusion, and biosimilar versions are available (2).
• Integrin receptor antagonists (vedolizumab), which block a different inflammatory pathway and are given by infusion, often followed by infusions or injections for maintenance (2).
• Interleukin antagonists (ustekinumab and mirikizumab), which target specific interleukin proteins involved in inflammation (2). Mirikizumab (Omvoh) was approved by the FDA on October 26, 2023, as the first interleukin-23p19 antagonist for moderately to severely active ulcerative colitis (5).

Biologics are not a cure, but they can control symptoms, reduce inflammation, and help work toward remission (2). Because they affect the immune system, they can increase infection risk, so vaccination and prompt reporting of fevers matter (2).

Targeted Synthetic Small Molecules

These are oral medicines that target specific parts of the immune system. There are two kinds currently used in UC (2):

• JAK inhibitors (tofacitinib and upadacitinib) block JAK enzymes inside cells to calm an overactive immune response. Both are FDA approved for adults with moderate to severe ulcerative colitis (2).
• S1P receptor modulators (ozanimod and etrasimod) work by keeping certain immune cells in the lymph nodes so they cannot travel to the intestine and cause inflammation. Both are FDA approved for adults with moderate to severe ulcerative colitis (2).

Before starting these medicines, your team will order blood work, and live vaccines must be avoided while you are taking them (2).

Severity Map

The table below is a general guide. Your own plan depends on disease extent, prior treatments, other health conditions, and shared decisions with your doctor.

| Severity | Typical treatment options | | --- | --- | | Mild | Oral or rectal aminosalicylates (mesalamine, sulfasalazine); rectal therapy for left-sided or rectal disease (1)(2) | | Moderate | Aminosalicylates, a short course of corticosteroids for flares, often stepping up to a biologic, an immunomodulator, or an oral small molecule (1)(2) | | Severe | Corticosteroids to gain control, biologics, oral small molecules, or immunosuppressants for hospitalized patients; surgery if medicines do not work (1)(2) |

What Are Biologics and Small Molecules, and How Do They Differ?

Both biologics and small molecules are advanced therapies for moderate to severe UC, but they differ in form and delivery. Biologics are large antibody proteins, so they must be given by infusion or injection rather than as a pill (2). Small molecules are taken orally and absorbed through the intestine into the bloodstream (2). Both groups target specific steps in the immune system rather than suppressing it broadly, which is why your doctor may try one mechanism if another has not worked. The right choice depends on disease severity, how the medicine is delivered, your other health conditions, and your preferences.

When Is Surgery Needed, and Can It Cure Ulcerative Colitis?

Medicines are the main strategy, and most people manage UC without an operation. Surgery is considered when medicines cannot control the disease, when there are complications, or when there is concern about cancer or precancerous changes.

A crucial difference between UC and Crohn's disease is that UC is limited to the colon and rectum, so removing those organs removes the disease. For this reason, total removal of the colon and rectum (proctocolectomy) is generally considered curative for ulcerative colitis (3). NIDDK notes that people with UC "typically need lifelong treatment with medicines unless they have surgery to remove the colon and rectum" (1).

There are two main surgical approaches (1):

• Ileoanal reservoir surgery (the J-pouch), in which a surgeon builds an internal pouch from the end of the small intestine and connects it to the anus, allowing stool to pass in a more typical way without a permanent external bag.
• Ileostomy, in which the small intestine is connected to an opening in the abdomen (a stoma), and stool collects in an external pouch.

Surgery is a major decision with its own risks and recovery, so it is weighed carefully against the alternatives. The fact that it can end the disease, however, makes it an important option to understand. For more on how UC and Crohn's differ in this respect, see Crohn's disease vs ulcerative colitis.

How Is Treatment Monitored Over Time?

Living well with UC involves regular follow-up, not just taking medicine. Your team may track symptoms, blood tests, and stool markers of inflammation, and periodically look at the colon directly to check for mucosal healing.

A key part of monitoring is colorectal cancer surveillance. Long-standing inflammation of the colon raises the risk of colorectal cancer, so guidelines recommend a screening colonoscopy for dysplasia about 8 to 10 years after diagnosis in people with colonic IBD, with repeat surveillance after that based on your individual risk (4). Staying current on recommended vaccinations is also important, especially for people on immunomodulators, biologics, or small molecules, because these affect the immune system (2).

Frequently Asked Questions

Can ulcerative colitis be cured with medicine?

No medicine cures UC. Medicines are used to induce and maintain remission and to reduce inflammation in the colon (1). The only treatment generally considered curative is surgery to remove the colon and rectum, because that eliminates the affected organ (3).

Why can't I just stay on steroids?

Corticosteroids control flares quickly but are meant for short-term use. They are not recommended as long-term primary therapy because of serious side effects such as weakened bones, high blood sugar, and increased infection risk, so doctors taper them once a flare settles (2).

What is the difference between a biologic and a small molecule?

Biologics are antibody proteins given by infusion or injection, while small molecules such as JAK inhibitors and S1P receptor modulators are taken as oral pills (2). Both target specific parts of the immune system and are used for moderate to severe UC.

Is mirikizumab a new option?

Yes. Mirikizumab (Omvoh) was approved by the FDA on October 26, 2023, as the first interleukin-23p19 antagonist for moderately to severely active ulcerative colitis, adding another targeted choice for moderate to severe disease (5).

Will I need a permanent bag after surgery?

Not necessarily. Many people are candidates for J-pouch (ileoanal reservoir) surgery, which restores a more typical way of passing stool without a permanent external pouch, while others have an ileostomy with an external bag (1). Which option fits depends on your situation and your surgeon's advice.

How often do I need a colonoscopy?

Because of the increased colorectal cancer risk with long-standing UC, guidelines suggest starting surveillance colonoscopy about 8 to 10 years after diagnosis, then repeating it on a schedule your doctor sets based on your personal risk factors (4).

Do I still need treatment when I feel fine?

Usually yes. Maintaining remission and aiming for healed colon tissue (mucosal healing) helps prevent future flares and complications, so doctors often continue maintenance therapy and monitoring even when symptoms are absent (1).

This article is for general education only and is not medical advice. Ulcerative colitis treatment must be individualized. Always discuss your symptoms, medication choices, and any decisions about surgery with a qualified healthcare professional who knows your full medical history.

References

1. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Treatment for Ulcerative Colitis. https://www.niddk.nih.gov/health-information/digestive-diseases/ulcerative-colitis/treatment
2. Crohn's & Colitis Foundation. Medication Options for Ulcerative Colitis. https://www.crohnscolitisfoundation.org/patientsandcaregivers/what-is-ulcerative-colitis/medication
3. Liu S, et al. State-of-the-art surgery for ulcerative colitis. PMC, 2021. https://pmc.ncbi.nlm.nih.gov/articles/PMC8481179/
4. Murthy SK, et al. AGA Clinical Practice Update on Endoscopic Surveillance and Management of Colorectal Dysplasia in Inflammatory Bowel Diseases. Gastroenterology, 2021. https://www.gastrojournal.org/article/S0016-5085(21)03093-6/fulltext
5. Eli Lilly and Company. FDA Approves Lilly's Omvoh (mirikizumab-mrkz), A First-in-Class Treatment for Ulcerative Colitis. 2023. https://investor.lilly.com/news-releases/news-release-details/fda-approves-lillys-omvohtm-mirikizumab-mrkz-first-class