Diarrhea on GLP-1 Medications: What to Know
Diarrhea is a frequently reported side effect of GLP-1 medications. While it may seem contradictory alongside constipation, GLP-1 medications affect gut motility in different ways for different patients. Diarrhea is usually most pronounced during the early weeks of treatment and tends to resolve as the body adapts to the medication.
How Common Is It?
Why Do GLP-1 Medications Cause Diarrhea?
- •GLP-1 medications alters the speed and pattern of intestinal contractions, which can lead to loose or watery stools in some patients
- •Changes in bile acid metabolism caused by GLP-1 receptor activation can increase fluid secretion in the intestines
- •The medication can alter the gut microbiome composition, temporarily disrupting normal digestive patterns
- •Dietary changes made alongside starting the medication may also contribute to digestive upset
When Does It Happen?
Diarrhea on GLP-1 medications are most common during the first 2-4 weeks of treatment and following dose increases. Most patients experience improvement within a few weeks as the gastrointestinal system adjusts. Episodes may be intermittent rather than constant.
How to Manage Diarrhea on GLP-1 Medications
Follow the BRAT diet (bananas, rice, applesauce, toast) during acute episodes to firm up stools
Stay well-hydrated with water, clear broths, and electrolyte solutions to replace lost fluids
Avoid dairy products, caffeine, alcohol, and high-sugar foods that can worsen diarrhea
Eat smaller, more frequent meals to reduce the load on the digestive system
Avoid artificial sweeteners such as sorbitol and mannitol, which can have a laxative effect
When to Contact Your Doctor
Seek medical attention if you experience any of the following:
- ⚠Diarrhea persists for more than 3 days without improvement
- ⚠You develop signs of dehydration including dark urine, extreme thirst, or dizziness
- ⚠You notice blood or mucus in your stool
- ⚠You develop a fever along with diarrhea
- ⚠Diarrhea is severe enough to interfere with daily activities or sleep
Track Diarrhea with JellyPal
Log your diarrhea episodes, identify patterns, and share detailed reports with your doctor. JellyPal helps you understand how your medication affects you over time.
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