Side effects guide

Cagrilintide Side Effects

Amylin analog

In the Phase 2 obesity trial, gastrointestinal disorders were the most frequent adverse events, reported by roughly 41%-63% of cagrilintide recipients versus about 32% on placebo, with nausea in 20%-47% versus 18% on placebo. Injection-site reactions were also noted. Most effects were mild to moderate.[1][2]

Reviewed for accuracy · Last reviewed July 8, 2026

Reported side effects

COMMONNausea · Reduced appetite · Injection-site reactions · Constipation
LESS COMMONVomiting · Diarrhea · Fatigue

The CagriSema combination trials showed a similar pattern, with gastrointestinal events the main safety concern and most described as transient and mild to moderate. Because cagrilintide is investigational, its longer-term safety profile as a monotherapy is not yet well characterized, and there is no approved label documenting rarer risks.

Seek medical attention ifYou notice severe or persistent vomiting, signs of an allergic reaction, or severe abdominal pain.

Managing side effects

Many people find gastrointestinal effects ease as the body adjusts to a dose. Holding a dose steady before the next step-up and injecting after a lighter meal are commonly discussed ways to limit nausea.

FAQ

How common are side effects with cagrilintide?In the Phase 2 trial gastrointestinal effects (nausea, vomiting, diarrhea, constipation) were the most frequent adverse events, mostly mild to moderate and dose-related, alongside injection-site reactions. Rarer or long-term risks are not yet well characterized in humans.
Do the side effects get better over time?Trial data suggests gastrointestinal effects were concentrated around dose increases and often settle as the body adjusts, though individual experience varies.

References

  1. Once-Weekly Cagrilintide for Weight Management in People With Overweight and Obesity: A Dose-Finding Phase 2 TrialThe Lancet · 2021 · PMID 34798060 · DOI 10.1016/S0140-6736(21)01751-7 · NCT03856047
  2. Cagrilintide-Semaglutide in Adults With Overweight or Obesity and Type 2 Diabetes (REDEFINE 2)New England Journal of Medicine · 2025 · PMID 40544432 · DOI 10.1056/NEJMoa2502082 · NCT05394519
Following this research protocol? PepHub can log your weekly doses and remind you.Coming soon

This page is an independent educational reference and is not medical advice, and does not indicate any approval status for any use. Talk to a doctor before starting any compound.