When to seek medical care
Seek prompt medical assessment for dehydration symptoms, blood or black stools, severe abdominal pain, high fever, or repeated vomiting that prevents drinking. Call 911 for collapse, severe confusion, or another suspected emergency.
NIDDK advises adults to contact a doctor for diarrhea lasting more than two days or six or more loose stools a day. Seek advice earlier if you are older, pregnant, immunocompromised, or have another condition that raises risk. A medication side-effect explanation should not delay evaluation.
Medication timing is a clue, not a diagnosis
Diarrhea appears in the Wegovy and Zepbound adverse-reaction information. Tell your clinician whether symptoms followed starting treatment or a prescribed dose change. Do not assume a new episode must be the medicine.
Other causes include infections, food intolerance, and other medicines. Record recent illness, travel, antibiotics, supplements, and dietary changes. Trial averages do not establish how long your symptoms will last or whether they are safe to manage at home.
A short symptom record
| Record | Why it matters |
|---|---|
| Start date and loose-stool count | Describes duration and severity |
| Blood, fever, pain, or vomiting | May change urgency and evaluation |
| Ability to drink and urine changes | Helps assess possible fluid loss |
| Prescription changes and other medicines | Supports medication review |
| Travel, illness, foods, or antibiotics | Raises other possible causes |
Food and fluid support while arranging advice
Choose foods and portions you tolerate rather than fasting automatically. Review whether large greasy meals, alcohol, or sugar alcohols seem to worsen symptoms. The food-tolerance guide offers practical swaps without a universal banned-food list.
Frequent losses can make fluid replacement important. Ask your clinician or pharmacist whether an oral rehydration product is appropriate, especially with persistent losses or other medical conditions. Follow prescribed fluid restrictions. The hydration guide explains why water alone is not a substitute for assessment during ongoing symptoms.
Do not start repeated antidiarrheal treatment, antibiotics, or a medication hold based only on this page. Your pharmacist or clinician can assess the cause and whether a remedy is suitable, particularly with fever or blood in stools. Discuss ongoing tolerance through clinician-guided care.
Frequently asked questions
Is diarrhea always caused by my GLP-1?
No. Infection, other medicines, and food intolerance are among other possibilities. Describe timing and associated symptoms to your clinician.
How long should I wait before calling?
Seek advice promptly for warning signs. NIDDK advises adults to contact a doctor for more than two days of diarrhea or six or more loose stools daily; higher-risk adults may need earlier advice.
Should I skip my next dose?
Ask the prescriber for product-specific advice. Do not change treatment independently, and do not wait for a dose decision before seeking care for severe symptoms.
Can I use an over-the-counter remedy?
Ask your pharmacist or clinician whether it fits your symptoms and other medicines. Fever, blood in stools, or severe symptoms need assessment.
References and editorial information
- Wegovy prescribing information and device instructions
- Zepbound prescribing information and device instructions
- NIDDK: diarrhea symptoms and causes
This educational article does not replace diagnosis, product instructions, or advice from your healthcare professional. Individual treatment decisions require your clinician.
Read our editorial policy and medical review process.
