Ozempic Constipation: How to Get Relief

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At a glance

Step	What to do	Notes
Add fiber gradually	Aim for ~25–38 g/day from food or a supplement	Too much too fast causes bloating — increase over days, not hours
Drink more fluids	2+ liters of water a day	Fiber needs water to work; dehydration makes constipation worse
Move daily	Walk; any general activity	Physical activity stimulates bowel motility
Consider an osmotic laxative	PEG 3350 (MiraLAX) or a stool softener	Use with clinician guidance; avoid stimulant laxatives long-term
Keep a routine	Consistent meal and bathroom timing	The gastrocolic reflex is strongest 20–30 min after eating

Side-effect rates are from trials of the FDA-approved branded medications and are averages, not individual predictions. Information is current as of June 2026.

Why does Ozempic cause constipation?

Two mechanisms work together. First, GLP-1 receptors are present throughout the gastrointestinal tract, and semaglutide activation slows gut motility — food moves through more slowly, giving the colon more time to absorb water from stool, which makes it harder and harder to pass. Second, eating less means taking in less fiber and fluid, both of which are what keeps stools soft and regular. Unlike nausea — which often peaks in the first few weeks then fades — constipation can persist longer into treatment and is less likely to resolve on its own without deliberate dietary attention.

The Wegovy prescribing label reports constipation in approximately 24% of patients in clinical trials; the STEP 1 trial (Wilding et al., NEJM 2021), the pivotal semaglutide weight-loss study, confirmed GI effects as the most common adverse events. For additional context on how GLP-1 medications work and their recognized side-effect profile, see the NIDDK overview of prescription weight-loss medications.

How to get relief from Ozempic constipation

Start with the lifestyle basics before reaching for any medication:

• Increase fiber gradually. Target ~25–38 g/day, but spread the increase over several days rather than making one big jump — too much fiber added at once causes gas and bloating. Good sources include beans, lentils, oats, chia seeds, leafy greens, and whole grains. See high-fiber foods for people on GLP-1 for a practical list.
• Drink 2+ liters of water a day. Fiber is a sponge — it only works when there's enough fluid to draw into the stool. If you're drinking less than usual because your appetite is suppressed, this is easy to underdo. See hydration on GLP-1 for guidance.
• Move every day. Even a 20–30 minute walk can stimulate bowel motility. There's no need for intense exercise — consistency matters more than intensity here.
• Consider an osmotic laxative if needed. Polyethylene glycol (PEG 3350, sold as MiraLAX) draws water into the bowel and is generally well-tolerated for short-term use. Stool softeners (docusate) are another gentle option. Use with your clinician's guidance, and avoid relying on stimulant laxatives long-term — they can cause dependence and worsen motility issues over time.
• Ask about magnesium. Magnesium citrate draws water into the colon and can help some people, but appropriate doses vary and it's not suitable for everyone (particularly people with kidney concerns). Check with your clinician before using it regularly.

For a broader look at how diet fits into GLP-1 treatment, see what to eat on a GLP-1 program.

Does tirzepatide (Mounjaro / Zepbound) also cause constipation?

Yes. Tirzepatide is a dual GIP/GLP-1 receptor agonist and causes constipation through a similar mechanism. The Zepbound prescribing label and the SURMOUNT-1 trial (Jastreboff et al., NEJM 2022) report constipation in approximately 11–17% of tirzepatide patients — somewhat lower than semaglutide but still meaningful. The same management steps apply: gradual fiber increase, fluids, movement, and clinician-guided laxatives if needed. See the full Mounjaro and Zepbound side effects guide for a complete picture.

When to call your clinician

Constipation is common and usually manageable, but some symptoms need prompt evaluation. Contact your clinician — or seek emergency care — if you have:

• Severe or worsening abdominal pain
• No stool and no gas for an extended period (possible obstruction)
• Persistent vomiting alongside constipation
• Significant abdominal distension (bloating that is hard and visibly enlarged)

These can be signs of a bowel obstruction — a rare but serious complication. Do not ignore constipation that does not respond to fiber, fluids, and laxatives.

Related side-effect guides

• Ozempic & Semaglutide Side Effects: The Complete Guide (cluster hub)
• Ozempic Nausea: How to Manage It
• Sulfur Burps on Ozempic: Why They Happen and How to Stop Them
• Starting Ozempic: What to Expect Week by Week
• How Long Do Ozempic Side Effects Last?

How Nouri helps you manage GLP-1 side effects

The single biggest factor in managing GLP-1 side effects is slow dose titration — starting low and increasing gradually, which reduces the GI burden significantly. Nouri's program includes guidance from the Nouri Care Team (U.S.-licensed physicians and clinicians), who can adjust your titration pace and help you navigate symptoms as they arise. The program also includes a nutrition plan designed around the dietary needs of people on GLP-1 treatment — including adequate fiber and hydration targets that directly address constipation risk.

When prescribed, the program includes compounded semaglutide (from $120/month on the 6-month plan) or compounded tirzepatide (from $175/month on the 6-month plan), all-in. Compounded GLP-1 medications are prepared by state-licensed 503A compounding pharmacies — including Jungle Jim's Pharmacy (Fairfield, OH) — and are not FDA-approved and not therapeutically equivalent to the brand-name drugs (Wegovy, Ozempic, Zepbound, Mounjaro). For more on how compounding works, see the FDA's overview of human drug compounding.

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Frequently asked questions

Does Ozempic cause constipation?

Yes — about 24% of people on semaglutide report constipation, according to the Wegovy prescribing label. It happens because GLP-1s slow gut motility and because eating less means less fiber and fluid.

How do you fix constipation on Ozempic?

Gradually increase fiber to ~25–38 g/day, drink 2+ liters of water daily, and move every day. If that's not enough, an osmotic laxative (PEG/MiraLAX) or a stool softener can help — best used with your clinician's guidance.

What is the best laxative for Ozempic constipation?

An osmotic laxative such as polyethylene glycol (MiraLAX) is commonly recommended and gentle. Stool softeners are another option. Use either with clinician guidance rather than relying on stimulant laxatives long-term.

Does magnesium help with GLP-1 constipation?

Magnesium citrate draws water into the bowel and can help some people, but appropriate doses vary by individual. Check with your clinician before using it regularly, especially if you have kidney concerns.

How long does Ozempic constipation last?

Constipation can linger longer than other GI side effects on semaglutide, but usually improves with consistent fiber, fluids, and movement. Persistent constipation despite those steps is worth discussing with your clinician.

Does Mounjaro or Zepbound cause constipation?

Yes — tirzepatide causes constipation in approximately 11–17% of patients in clinical trials. The same steps apply: gradually add fiber, drink plenty of fluids, move daily, and use a clinician-guided laxative if needed.

Sources & references

• Wegovy (semaglutide) FDA prescribing label — adverse reactions section [Tier 1]
• Zepbound (tirzepatide) FDA prescribing label — adverse reactions section [Tier 1]
• Wilding JPH, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity (STEP 1). NEJM 2021 [Tier 1]
• Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1). NEJM 2022 [Tier 1]
• NIDDK. Prescription medications to treat overweight and obesity. National Institute of Diabetes and Digestive and Kidney Diseases [Tier 1]
• U.S. FDA. Human drug compounding. Food and Drug Administration [Tier 1]
• Managing GLP-1 gastrointestinal side effects (Cleveland Clinic) [Tier 3]

Medically reviewed by Amber Patel, MD. Reviewed June 28, 2026. Nouri content is reviewed by licensed clinicians and updated as guidance changes. Author: Nouri Editorial Team.

This article is general information, not individual medical advice — talk to your clinician about your symptoms, and seek urgent care for the red-flag symptoms described here. Side-effect rates are from clinical trials of the FDA-approved branded medications (Wegovy, Zepbound); compounded semaglutide and tirzepatide were not studied in these trials, are not FDA-approved, and are not the same as, or therapeutically equivalent to, the brand-name drugs. GLP-1 medications carry a boxed warning for thyroid C-cell tumors and are contraindicated with a personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Ozempic®, Wegovy® and Rybelsus® are registered trademarks of Novo Nordisk; Mounjaro® and Zepbound® are registered trademarks of Eli Lilly; Nouri is not affiliated with these companies. Information is current as of June 2026.