# Constipation on GLP-1s: Prevention and Treatment

> Constipation affects up to about 1 in 4 people on GLP-1s because these medications slow how fast food moves through your gut. It's usually worst in the first weeks or after a dose increase, then improves. Prevent and treat it with 2–3 liters of water daily, gradually added fiber, and staying active — plus OTC options like polyethylene glycol (MiraLAX), magnesium citrate, or psyllium if needed. Call your provider for no bowel movement in 3+ days, severe pain, or blood in your stool.

![Anatomical illustration of the large intestine (colon) with a reddened, irritated segment — representing constipation on GLP-1 medications.](https://tryimbue.com/images/learn/glp1-constipation-large-intestine.jpg)

Canonical: https://tryimbue.com/learn/constipation-on-glp1s
Last clinically reviewed: 2026-07-21 by Dr. Prajeet Reddy, MD (Medical Director, Cyane Medical Group California PC)

GLP-1 medications (such as Ozempic, Wegovy, Mounjaro, and Zepbound) work partly by slowing down how fast food moves through your stomach and intestines. This helps control blood sugar and appetite, but it can also cause constipation. Up to 1 in 4 people taking these medications may experience it, especially when first starting or when the dose is increased.[[1]](https://www.nejm.org/doi/full/10.1056/NEJMra2500106)[[2]](https://pubmed.ncbi.nlm.nih.gov/41324524) The good news: constipation usually improves over time and can be managed effectively.[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)[[4]](https://pubmed.ncbi.nlm.nih.gov/41730476)

## Dietary Tips

- **Drink plenty of fluids.** Aim for at least 8–10 glasses (about 2–3 liters) of water per day. Staying well hydrated is one of the most important steps to prevent and relieve constipation.[[5]](https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/jamainternmed.2025.1794)[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)
- **Gradually increase fiber** to avoid bloating and gas:[[6]](https://doi.org/10.1097/HEP.0000000000001608)[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)
  - Fruits: prunes, pears, apples, berries, kiwi
  - Vegetables: broccoli, spinach, sweet potatoes, carrots
  - Whole grains: oatmeal, whole wheat bread, brown rice
  - Legumes: lentils, beans, chickpeas
- **Try prunes or dried fruits.** Prunes are a natural, effective remedy — start with 3–5 per day.[[6]](https://doi.org/10.1097/HEP.0000000000001608)
- **Choose foods with high water content.** Soups, smoothies, cucumbers, watermelon, and oranges help keep things moving.[[6]](https://doi.org/10.1097/HEP.0000000000001608)
- **Limit foods that slow digestion.** Large, high-fat, or greasy meals can make constipation worse. Eat smaller, more frequent meals instead.[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)[[6]](https://doi.org/10.1097/HEP.0000000000001608)

## Lifestyle Strategies

- **Stay active.** Regular activity — even a daily 20–30 minute walk — helps stimulate bowel movements.[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)
- **Don't ignore the urge.** When you feel the need to go, go promptly. Delaying can worsen constipation.
- **Establish a routine.** Try to use the bathroom at the same time each day, such as after breakfast, when the body's natural reflexes are strongest.

## Over-the-Counter Options

If diet and lifestyle changes aren't enough, the following may help. Talk to your provider before starting any new supplement or medication.

- **Polyethylene glycol 3350 (MiraLAX)** — an osmotic laxative that draws water into the stool to soften it. Generally safe for daily use.[[6]](https://doi.org/10.1097/HEP.0000000000001608)
- **Magnesium citrate** — a gentler option that can be taken daily. Powdered forms let you adjust the dose; start low and increase as needed.[[6]](https://doi.org/10.1097/HEP.0000000000001608)
- **Fiber supplements** — psyllium (Metamucil) or methylcellulose (Citrucel) add bulk to stool. Drink plenty of water when taking them.[[6]](https://doi.org/10.1097/HEP.0000000000001608)[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)
- **Stool softeners** — docusate sodium (Colace) softens stool and reduces straining.[[6]](https://doi.org/10.1097/HEP.0000000000001608)

## When to Call Your Doctor

Contact your provider if you experience:

- No bowel movement for 3 or more days despite the strategies above
- Severe abdominal pain, bloating, or cramping
- Blood in your stool
- Nausea or vomiting that prevents you from eating or drinking
- Signs of dehydration: dark urine, dizziness, dry mouth, or feeling faint[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)

## Key Reminders

- Constipation is a common, expected side effect — it doesn't mean the medication is harmful or needs to be stopped.[[3]](https://linkinghub.elsevier.com/retrieve/pii/S0002-9165(25)00240-0)[[4]](https://pubmed.ncbi.nlm.nih.gov/41730476)
- Symptoms are usually worst during the first few weeks or after a dose increase and tend to improve over time.[[7]](https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD015092.pub2/full)
- Proactive management with fluids, fiber, activity, and OTC remedies can make a big difference.[[5]](https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/jamainternmed.2025.1794)[[6]](https://doi.org/10.1097/HEP.0000000000001608)
- Never stop or change your medication dose without talking to your provider first.

## Frequently asked questions

### Why do GLP-1s cause constipation?

GLP-1 medications work partly by slowing how fast food moves through your stomach and intestines, which helps control appetite and blood sugar but also slows the colon. Up to about 1 in 4 people experience constipation, most often when first starting or after a dose increase. It usually improves as your body adjusts.

### What's the best thing to take for GLP-1 constipation?

Start with hydration (2–3 liters of water daily) and gradually increased fiber. If that's not enough, common OTC options include polyethylene glycol 3350 (MiraLAX), an osmotic laxative generally safe for daily use; magnesium citrate; psyllium (Metamucil) or methylcellulose (Citrucel) fiber supplements taken with plenty of water; and stool softeners like docusate (Colace). Talk to your provider before starting a new supplement or laxative.

### When should I worry about constipation on a GLP-1?

Contact your provider if you have no bowel movement for 3 or more days despite the strategies above, severe abdominal pain, bloating or cramping, blood in your stool, nausea or vomiting that stops you eating or drinking, or signs of dehydration (dark urine, dizziness, dry mouth). These can signal a more serious problem than routine constipation.

### Do I need to stop my medication if I get constipated?

No — constipation is a common, expected side effect and does not mean the medication is harmful. Never stop or change your dose on your own; if symptoms are hard to manage, your provider can slow your dose increases or suggest additional treatments.