Skip to content
Strong human trialsIn clinical trialsBlend

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

Rates as each trial or label states them. A rate from one trial does not carry over to research-grade vials or other doses.

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

What people post and what dosing guides list. These are reports, not measured rates.

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.

Regulatory1

  1. Wegovy (semaglutide) label, revised 6/2026DailyMed · checked Oct 24, 2026

Community-reported12

  1. I just want to give a month update.r/CagriSema · checked Oct 24, 2026
  2. Tiredr/CagriSema · checked Oct 24, 2026
  3. 6 months in, hated itr/CagriSema · checked Oct 24, 2026
  4. Sleepiness after meals (comment)r/CagriSema · checked Oct 24, 2026

Back to the full CagriSema page for dosing, the vial chart and storage.