Constipation

The Risk of Bowel Obstruction and Ileus

While constipation is common on GLP-1s, it needs to be watched closely so it doesn't turn into something more serious — like an ileus (meaning the muscles in your intestines stop moving things along) or a full bowel obstruction (a complete blockage in your digestive tract). These complications are serious enough that the FDA recently updated warning labels for medications like Ozempic to make people aware of the risk. It's critical to get medical help right away if your constipation comes with severe abdominal pain, persistent vomiting, or an inability to pass gas — these are "red flag" symptoms of a potentially life-threatening blockage that may require surgery. The risk is higher because GLP-1 medications can disrupt something called the migrating motor complex, or MMC — that's your gut's internal "housekeeping" cycle, a wave-like muscle movement that sweeps leftover waste through your intestines between meals. When that cycle gets disrupted, stools sit longer in your digestive tract, dry out, and can become physically stuck.

Medication Timing and Anatomical Positioning

To get the most out of your prevention routine, try using a footstool during bowel movements to get into a squatting position — this helps straighten out the anorectal angle (meaning the natural bend between your rectum and the opening where stool exits), so things pass more easily without straining. It's also important to pay attention to timing with your supplements: fiber supplements should be taken at least 2 hours apart from any other oral medications, because fiber can act like a sponge and interfere with how well your body absorbs your prescriptions. If you're taking oral semaglutide (brand name Rybelsus), clinicians recommend waiting at least 30 minutes after your dose before taking osmotic laxatives like MiraLAX — an osmotic laxative is a gentle type of medicine that works by drawing water into your intestines to soften the stool rather than forcing the muscles to squeeze. Waiting that 30 minutes makes sure your main medication is fully absorbed before the laxative starts pulling water into your system.