Patient education

Nausea

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Nausea is among the most commonly reported side effects of GLP-1 medications, particularly early on and after dose changes. General information on meal timing, fluids, comfort measures, and when to call.

Why it can happen

GLP-1 medications slow stomach emptying, so food stays in the stomach longer. Together with reduced appetite, that can produce nausea — most often in the first days after an injection, during the first weeks of treatment, or after a dose increase.

For many people it settles as the body adjusts. Nausea that is severe, daily, or accompanied by vomiting is a reason to contact your provider before your next dose.

Everyday measures

General habits that many people find helpful. None of these replaces advice from your provider or pharmacist.

Small, frequent meals

Eating a little every few hours, even without much appetite. An empty stomach can make nausea worse.

Sip fluids

Water in small sips through the day rather than large amounts at once. Dehydration tends to make nausea worse.

Bland, low-fat choices

Crackers, toast, rice, bananas, and applesauce are common choices. Fried, greasy, very rich, or strongly spiced food is a frequent trigger.

Stay upright after eating

Waiting before lying down. Fresh air and a cool, quiet room can also help.

Options to raise with your provider or pharmacist

Ask before trying any of these, and mention every medication and supplement you already take. This page does not give doses.

Ginger, as tea or chews.
Peppermint tea (often avoided by people who also have reflux).
Vitamin B6 (pyridoxine).
Over-the-counter anti-nausea products, some of which cause drowsiness.
Acupressure wrist bands sold for motion sickness.

Habits that may help

Avoid strong smells such as cooking odours, perfume, and smoke.
Some people prefer taking their injection in the evening; ask your provider whether timing can be adjusted.
Keep a note of when nausea occurs relative to injection day and meals.

References

Nauck MA, Quast DR, Wefers J, Meier JJ. GLP-1 receptor agonists in the treatment of type 2 diabetes – state-of-the-art. Mol Metab. 2021;46:101102. https://pubmed.ncbi.nlm.nih.gov/33068776/
Lete I, Allué J. The effectiveness of ginger in the prevention of nausea and vomiting during pregnancy and chemotherapy. Integr Med Insights. 2016;11:11-17. https://pubmed.ncbi.nlm.nih.gov/27053918/
U.S. Food and Drug Administration. Semaglutide injection prescribing information. https://www.accessdata.fda.gov/drugsatfda_docs/label/2023/209637s008lbl.pdf