Does Wegovy Cause Constipation?
Yes, constipation is a common side effect of Wegovy (semaglutide), reported in clinical trials and post-approval data. In the STEP 1 trial, 24% of patients on the 2.4 mg dose experienced constipation, compared to 12% on placebo.[1] It's linked to GLP-1 receptor agonists like semaglutide slowing gastric emptying, which can disrupt bowel motility.
How Common Is It and Who Gets It Most?
Constipation affects up to 20-30% of Wegovy users, often starting early in treatment and dose escalation. Women and those on higher doses (2.4 mg weekly) report it more frequently. It typically resolves with time or management, but 1-5% discontinue due to GI issues including constipation.[2][1]
What Do Patients Say About It?
Real-world reports on forums and FDA adverse event data describe constipation as mild to moderate, sometimes with bloating or hard stools. Many note it peaks during the first 4-8 weeks, then improves as the body adjusts. Some combine it with nausea or diarrhea in alternating patterns.[3]
How to Manage Constipation on Wegovy
Increase fiber (25-30g daily from fruits, veggies, whole grains), drink 8-10 glasses of water, and add exercise like walking. Over-the-counter options include stool softeners (docusate), osmotic laxatives (MiraLAX), or magnesium supplements. Doctors often recommend starting these proactively during dose ramps. Avoid stimulant laxatives long-term to prevent dependency.[4]
When to Worry or See a Doctor
Contact a doctor if constipation lasts over a week, causes severe pain, blood in stool, vomiting, or weight loss beyond expected. It could signal ileus (bowel obstruction, rare but serious with GLP-1s) or dehydration. Those with prior GI conditions like IBS face higher risks.[2]
How Does It Compare to Ozempic or Mounjaro?
Wegovy's constipation rate matches Ozempic (same drug, 20-24%) but is higher than Mounjaro (tirzepatide, 12-17%), which has dual GLP-1/GIP action that may speed motility more. All carry similar GI warnings.[1][5]
Sources
[1]: Novo Nordisk Wegovy Prescribing Information
[2]: FDA Label for Wegovy
[3]: FDA FAERS Database
[4]: Mayo Clinic GLP-1 Side Effect Management
[5]: Eli Lilly Mounjaro Prescribing Information