GLP-1 Diarrhea: Why It Happens, How Long It Lasts
Yes. Diarrhea is listed in 10 of 10 GLP-1 labels. The highest rate in each label runs from 8.8% on Ozempic to 30% on Wegovy. Placebo in the Wegovy trials: 16%. Smaller, slower meals help most.
- Labels that list it
- 10 of 10
- Highest rate
- 30% Wegovy
- Lowest rate
- 8.8% Ozempic
A quick look at half-life and weight loss
A medicine's half-life in days shows how long the body needs to clear half a dose, based on section 12.3 of each FDA label.
Body weight percentage. Because trials, doses, and lengths differ, compare each with its own placebo on its page.
GLP-1 vs placebo: how often it shows up
Each label that reports this issue lists GLP-1 diarrhea, with the highest dose group first. The labels use their own trials, which included different groups of people. Think of it as a rough guide.
Two pill forms appear in the table: Rybelsus and Foundayo.
| Medicine | Highest rate in the label | Dose group | Placebo | People in the trials |
|---|---|---|---|---|
 Wegovy | 30% | 2.4 mg | 16% | Adults with obesity or overweight (weight management) |
 Foundayo | 25% | 17.2 mg | 11% | Adults with obesity or overweight (weight management) |
 Zepbound | 23% | 15 mg | 8% | Adults with obesity or overweight (weight management) |
 Saxenda | 20.9% | all doses | 9.9% | Adults with obesity or overweight (weight management) |
 Mounjaro | 17% | 15 mg | 9% | Adults with type 2 diabetes |
| Byetta | 13% | all doses | 6% | Adults with type 2 diabetes |
 Trulicity | 12.6% | 1.5 mg | 6.7% | Adults with type 2 diabetes |
 Victoza | 12% | 1.8 mg | 4% | Adults with type 2 diabetes |
 Rybelsus | 10% | 14 mg | 4% | Adults with type 2 diabetes |
 Ozempic | 8.8% | 1 mg | 1.9% | Adults with type 2 diabetes |
Sources: Ozempic label (DailyMed), Wegovy label (DailyMed), Rybelsus label (DailyMed), Mounjaro label (DailyMed), Zepbound label (DailyMed), Foundayo label (DailyMed), Trulicity label (DailyMed), Saxenda label (DailyMed), Victoza label (DailyMed), Byetta label (DailyMed).
From the FDA label (DailyMed).
Why it happens on GLP-1
These medicines slow how quickly your stomach empties. When food stays in your body longer, diarrhea may follow, most often after a big or fatty meal.
Source: health.clevelandclinic.org.
Wording in the Ozempic label
Word for word, the label says this about diarrhea:
“majority of the reported events occurred in patients who experienced gastrointestinal reactions leading to dehydration such as nausea, vomiting, or diarrhea [see Adverse Reactions (6.1)].”
From the FDA label (DailyMed).
What helps, step by step
- Drink water and an electrolyte drink to replace fluids and salts.
- Choose foods that are soft and bland, with little fiber, for a while.
- Cut back on caffeine, alcohol and milk drinks.
- Ask your prescriber about an anti-diarrhea medicine that is available at the drugstore.
- Choose smaller meals and stop eating when you feel full. These medicines slow down how quickly your stomach empties.
- Eat slowly. Your brain needs time to notice that you are full.
- Let your prescriber know if it does not ease. They may slow the dose increases or suggest another GLP-1.
Use the GLP-1 interactions checker for any drugstore product before taking it.
Source: health.clevelandclinic.org.