CagriSema side effects
Also known as: Cagrilintide/semaglutide · Cagrilintide-semaglutide · Cagri-Sema · Cagri/Sema
Updated 46 sources
10 side effects reported for CagriSema: 5 from studies and labels, 5 from users and guides. 4 come with the ways people manage them.
Side effects reported in studies and labels
From trials and regulators5
Clinical studies and regulatory documents.
Gastrointestinal side effects (any)
79.6% vs 39.9% on placebo in REDEFINE 1; 72.5% vs 34.4% in REDEFINE 2. Mostly mild to moderate and short-lived.
How people manage it
- The trials stepped up the dose every 4 weeks and let investigators keep people on a lower dose.
Nausea
55% vs 12.6% on placebo in REDEFINE 1
Constipation
30.7% vs 11.6% on placebo in REDEFINE 1
Vomiting
26.1% vs 4.1% on placebo in REDEFINE 1
Stopping because of side effects
About 6% vs 3.5 to 3.7% on placebo in REDEFINE 1; 8.4% vs 3% in REDEFINE 2
Side effects users and guides report
From users and guides5
Community reports, competitor and vendor guides, media.
Tiredness and drowsiness
Commonly reported on r/CagriSema, often in the first weeks
How people manage it
- Some users say it tapers after a few weeks.
- One user said only lowering the dose to 0.25 mg helped with sleepiness after meals.
- Others went back to semaglutide alone.
Vomiting after starting too high
Reported on r/CagriSema by users who started at 1.25 to 1.5 mg, and after a first dose from a 10 + 10 mg vial
How people manage it
- Users and threads point to starting at 0.25 mg + 0.25 mg and stepping up every 4 weeks.
Constipation and day-after nausea
Reported on r/CagriSema, including by trial participants
How people manage it
- A former trial participant used bone broth and sparkling water on injection day and a stool softener after a day without a bowel movement.
Emotional flatness
Reported by a few trial participants on r/CagriSema
Reflux and sulfur burps
Reported on r/CagriSema in the first weeks of a trial
Who should avoid it, and what not to combine
Personal or family history of medullary thyroid cancer or MEN 2Condition
The semaglutide label contraindicates use in these people because of a boxed warning for thyroid C-cell tumors.
Pregnancy or planned pregnancyCondition
The semaglutide label says it may cause fetal harm and to stop at least 2 months before a planned pregnancy because of its long half-life.
Insulin or sulfonylureasSubstance
The semaglutide label warns that combining it with insulin or an insulin secretagogue raises the risk of low blood sugar; those doses may need to come down.
How much is known
Strong human trials
Several phase 3 trials of Novo's product: REDEFINE 1, 2, 4 and 9 and REIMAGINE 2 and 5, plus phase 1b and phase 2 work. No published data cover research premixed blends, whose identity and stability are unverified.
CagriSema side effects questions
What are the most common CagriSema side effects?
Stomach and gut effects. In REDEFINE 1, 79.6% had a GI side effect vs 39.9% on placebo, mostly mild to moderate and short-lived. Nausea, constipation and vomiting led the list.
Sources for these side effects
19 sources, each checked by date. Record updated Oct 24, 2026. Numbers are restated in our own words and labelled by where they came from.
Clinical study6
- Garvey et al. Coadministered cagrilintide and semaglutide in adults with overweight or obesity (REDEFINE 1, NEJM 2025)PubMed · checked Oct 24, 2026
- Davies et al. Cagrilintide-semaglutide in adults with overweight or obesity and type 2 diabetes (REDEFINE 2, NEJM 2025)PubMed · checked Oct 24, 2026
- CagriSema demonstrates superior weight loss in REDEFINE 1 (20 Dec 2024)Novo Nordisk · checked Oct 24, 2026
- REDEFINE 1 trial: CagriSema results in 22.7% mean weight reduction (23 Jun 2025)Bariatric News, via a news report · checked Oct 24, 2026
Regulatory1
- Wegovy (semaglutide) label, revised 6/2026DailyMed · checked Oct 24, 2026
Community-reported12
- I just want to give a month update.r/CagriSema · checked Oct 24, 2026
- Tiredr/CagriSema · checked Oct 24, 2026
- 6 months in, hated itr/CagriSema · checked Oct 24, 2026
- Sleepiness after meals (comment)r/CagriSema · checked Oct 24, 2026
Back to the full CagriSema page for dosing, the vial chart and storage.