How to Relieve Constipation on Wegovy: A Practical Step-by-Step Guide

Step 1, drink more water, earlier in the day than you think you need to

Semaglutide slows the rate at which food leaves your stomach. That is part of how it reduces appetite, but it also means your gut has more time to absorb water from the stool passing through, making constipation on Wegovy more likely than it would be off treatment. The fix starts with hydration, and the timing matters. Spreading fluid intake through the morning and afternoon is more effective than catching up in the evening. Aim for roughly six to eight cups of water or clear, non-sugary drinks across the day. Hot drinks count; fizzy drinks are fine in moderation but can worsen bloating, so some people find plain water and herbal teas sit better.

If you take the Wegovy injection once a week, be particularly attentive to hydration on the two or three days after your injection, when gut-slowing effects tend to peak. The NHS patient page for semaglutide confirms that constipation is a common side effect and that self-care measures like increased fluid intake are appropriate first steps.

Step 2, adjust what you eat, without cutting too many calories at once

Fibre draws water into the bowel and keeps things moving. The practical challenge on Wegovy is that your appetite is suppressed, so it is easy to eat very little and end up short of fibre without noticing. Focus on foods that pack fibre into small volumes: oats, lentils, chickpeas, flaxseed, prunes, kiwi fruit, cooked leafy greens. A small portion of any of these does more for gut motility than a large plate of white rice or plain chicken.

Increase fibre gradually rather than all at once, a sudden jump causes bloating in many people. Soluble fibre (oats, pulses, fruit) tends to be gentler than insoluble fibre (bran) when stools are hard and dry. Knowing how to help constipation on Wegovy through diet is something a lot of patients wish they had been told before they started, so it is worth reading our detailed guide on dietary approaches if this is an ongoing issue for you.

One thing worth avoiding: large doses of added bran without enough liquid. Without adequate hydration, high-bran intake can make constipation worse rather than better.

Step 3, move your body and consider short-term over-the-counter support

Gentle physical activity stimulates gut motility. Even a 20-minute walk after meals can make a meaningful difference. You do not need a gym; a short walk is enough to trigger the natural wave-like contractions that move stool along.

If dietary and lifestyle adjustments are not enough within a few days, osmotic laxatives (such as macrogol, sold as Movicol or own-brand equivalents) are generally considered appropriate first-line support for constipation from Wegovy or semaglutide, and our dedicated page covers which remedies tend to work best and how to use them. They work by drawing water into the bowel rather than stimulating muscle contractions, which makes them well tolerated. Bulk-forming laxatives like ispaghula husk are another option, provided you drink enough water alongside them. Ask your pharmacist before starting any over-the-counter product, particularly if you take other regular medicines.

For a fuller picture of the side effects that can appear alongside constipation, including how Wegovy can affect your vision, the Wegovy side effects overview covers the full profile in plain terms.

When to get medical help without delay

Most constipation on semaglutide is uncomfortable but not dangerous. There are situations, though, where you should stop self-treating and seek medical attention the same day.

Call 111 or speak to your GP urgently if you develop severe or persistent abdominal pain, especially if it radiates to your back and is accompanied by vomiting. This combination of symptoms can indicate acute pancreatitis, a serious but infrequent complication of GLP-1 medicines. The MHRA issued a Drug Safety Update in January 2026 specifically highlighting acute pancreatitis as a known risk with this class of medicine, symptoms to watch for include intense, persistent stomach pain that does not settle with simple pain relief.

Also seek prompt medical advice if you have not opened your bowels for more than five days despite self-care, if you notice blood in your stool, if you have unexplained weight loss beyond what Wegovy would explain, or if you have severe bloating with vomiting. These are situations where a clinician needs to examine you rather than a side-effect guide reassure you.

You can find more on serious signs to watch for on our side-effect information page, and you can report any suspected side effect directly to the MHRA using the Yellow Card scheme, that reporting helps regulators track safety signals across the whole population on treatment.

If constipation is persistent or making you consider stopping treatment, that is exactly the kind of conversation our prescribers have as part of every clinical review. You can get in touch with the aftercare team or, if you are not yet a patient, discuss suitability and potential side effects as part of a free consultation.