Liraglutide Side Effects
FDA Approved
Written by Alejandro Reyes
Founder & Lead Researcher
PN
Reviewed by Peptide Nerds Editorial · Updated April 2026
Important safety information. This page covers known and reported side effects of Liraglutide. This is not a complete list. Always discuss potential risks with your healthcare provider before starting any peptide protocol. Full medical disclaimer.
Known side effects
The following side effects have been reported in clinical trials for Liraglutide:
- Nausea
- Diarrhea
- Constipation
- Headache
- Low blood sugar risk when combined with insulin
Severity and frequency
Clinical trial data provides specific frequency data for Liraglutide side effects. Most common side effects are mild to moderate and often improve with continued use or dose adjustment.
When to seek medical attention
Contact your healthcare provider immediately if you experience:
- Severe or persistent symptoms that do not improve
- Signs of an allergic reaction (rash, swelling, difficulty breathing)
- Severe abdominal pain
- Changes in vision or neurological symptoms
- Any symptom that concerns you
Risk factors
Side effect risk may be higher in certain populations. Discuss your complete medical history with your doctor, including:
- Pre-existing medical conditions
- Current medications (drug interactions)
- Pregnancy or plans to become pregnant
- History of allergic reactions to peptides or similar compounds
Research references
- A Randomized, Controlled Trial of 3.0 mg of Liraglutide in Weight Management (SCALE) — New England Journal of Medicine (2015) [PubMed]
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