Does Ozempic Cause Constipation?
Yes, constipation is a common side effect of Ozempic (semaglutide), an injectable GLP-1 receptor agonist used for type 2 diabetes and weight management. Clinical trials reported it in 3-9% of patients, depending on dose, with higher rates during dose escalation.[1][2] The drug slows gastric emptying, which can reduce bowel movements.
How Common Is Constipation on Ozempic?
In the SUSTAIN trials, constipation affected 5-7% of Ozempic users versus 1-3% on placebo. Real-world data from post-marketing reports and apps like Drugs.com show patient complaints around 5-10%, often mild and temporary.[1][3] It's more frequent at higher doses (1mg or 2mg weekly).
Why Does Ozempic Slow Digestion?
Ozempic mimics GLP-1 hormone, delaying stomach emptying and intestinal motility to control blood sugar and appetite. This mechanism reduces hunger but can harden stool and extend transit time through the gut, leading to constipation.[2][4]
What Helps with Ozempic-Related Constipation?
- Increase fiber (25-30g daily from fruits, veggies, whole grains) and water intake (8-10 glasses).
- Add over-the-counter aids like MiraLAX, stool softeners, or magnesium supplements.
- Exercise regularly and consider probiotics.
Most cases resolve in 1-2 weeks; consult a doctor if it lasts longer or includes pain.[3][5]
How Long Does Constipation Last?
It typically starts in the first 4 weeks as the body adjusts, peaking during dose increases. For 70-80% of users, it improves within a month without intervention.[1][6]
When to See a Doctor
Seek care if constipation persists beyond 2 weeks, causes severe bloating, vomiting, or blood in stool—these could signal ileus or obstruction, rare but serious Ozempic risks (0.1-1% incidence).[2][4] Not for everyone; monitor if you have gut disorders like IBS.
Ozempic vs. Other GLP-1 Drugs for Gut Side Effects
| Drug | Constipation Rate | Nausea Rate (Often Co-Occurs) |
|------|-------------------|-------------------------------|
| Ozempic (semaglutide) | 3-9% | 15-20% [1] |
| Wegovy (higher-dose semaglutide) | 5-12% | 20-25% [7] |
| Mounjaro (tirzepatide) | 6-13% | 20-25% [8] |
| Trulicity (dulaglutide) | 2-5% | 10-15% [1] |
Ozempic has moderate rates; switching drugs or lowering dose helps some.[4]
[1]: Ozempic Prescribing Information (Novo Nordisk)
[2]: FDA Label for Ozempic
[3]: Drugs.com - Ozempic Side Effects
[4]: NEJM - SUSTAIN Trials
[5]: Mayo Clinic - GLP-1 Side Effects Management
[6]: JAMA - Real-World GLP-1 GI Effects
[7]: Wegovy Prescribing Information
[8]: Mounjaro Prescribing Information (Eli Lilly)