Best Constipation Remedies on a GLP-1, and Which One Fits You

GLP-1 drugs slow your gut, so stool sits longer and dries out. An osmotic laxative keeps water in the stool. Fiber helps keep you regular once you drink enough. A stimulant laxative is the short-term backup. If two weeks of daily osmotic treatment hasn't helped, ask your prescriber about prescription options or a slower dose increase.

There is good news, too. A large 2026 study found that brand-new constipation was uncommon in the first year on these drugs.

Why does a GLP-1 make you constipated?

GLP-1 drugs such as semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) slow how fast food moves through your stomach and intestines (HealthRX Wegovy constipation guide). The longer stool stays in your colon, the more water your body pulls out of it. You end up with hard, dry stool that comes out less often. For that reason, GLP-1 guides favor remedies that add water over remedies that add bulk (Modern Weight Science laxative guide). The same guides say constipation tends to be worst while your dose is going up and often eases over the following weeks to months (HealthRX GLP-1 constipation guide).

The 2026 study looked at US patients with obesity. People on semaglutide, tirzepatide or liraglutide had constipation more often than people not taking them. Among patients who had no constipation before, starting a GLP-1 was linked to a nearly 50% higher chance of new constipation. Even so, fewer than 4% developed it within a year (Clinical Gastroenterology and Hepatology study, reported by Medscape). Medscape's headline summed it up as common but rarely new. If your bowels were slow before you started, plan for constipation and start prevention in your first week instead of waiting for a bad one.

Which remedy fits your situation?

If you're starting a GLP-1 or about to raise your dose, begin with the basics. Drink more fluid, eat more fiber, move every day, and try a footstool on the toilet (the "squatty potty"). These are the non-drug steps in the 2023 AGA-ACG guideline on chronic constipation (Emory summary of the guideline). Take extra fiber carefully. GLP-1 guides call bulk fiber a maintenance tool and warn that it can make things worse when your gut is already slow or you aren't drinking enough (Modern Weight Science; HealthRX).

If you're already backed up, a daily osmotic laxative comes first. Polyethylene glycol holds water in your stool, so it comes out softer and easier to pass. Both GLP-1 guides put an osmotic laxative first.

If a daily osmotic laxative hasn't worked after about two weeks, HealthRX's guide suggests two next steps. You can add a stimulant laxative for a short time, or you can ask your prescriber about lubiprostone or linaclotide (HealthRX). Stimulant laxatives such as senna or bisacodyl make your intestinal muscles push harder. The same guide warns against using some of them long-term without medical supervision. Modern Weight Science also advises adding a stimulant second instead of raising the dose of one laxative indefinitely. Lubiprostone and linaclotide are prescription drugs that draw fluid into the intestine. They belong to one of the drug classes the AGA-ACG guideline lists for chronic constipation.

When is it more than constipation?

If constipation keeps coming back with each dose increase, your dose schedule may need to change, and only your prescriber can do that. A multidisciplinary expert panel wrote guidance on reaching the full maintenance dose and on what to do when stomach and bowel side effects appear during dose increases. It said its recommendations may help keep people from quitting treatment (expert consensus on GLP-1 side effects). Tell your prescriber which remedies you've tried and for how long. That information helps decide between a prescription laxative and a slower dose schedule.

Report severe belly pain promptly, especially if it doesn't feel like constipation. The Ozempic label warns that acute pancreatitis (inflammation of the pancreas) has occurred in people taking GLP-1 drugs, and it tells prescribers to stop the drug if pancreatitis is suspected (FDA Ozempic label).