ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It comes as a nasal powder, a ready-to-use pen, or a kit. Family, friends, and coworkers should know where it is and how to use it.
What it's used for
- Severe low blood sugar
How to take it
- If someone with diabetes is passed out, having a seizure, or can't swallow safely, give glucagon right away (nasal: one spray in one nostril; injection: thigh, arm, or belly).
- Call 911. Turn the person on their side in case they vomit.
- When they're awake and can swallow, give fast sugar and then a snack.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Nausea and vomiting
- Headache
- Watery eyes or stuffy nose (nasal)
Call 911The person doesn't wake up within 15 minutes. A second dose may be given if available.
Warnings
- Check expiration dates and replace after use.
Other medicines, foods, and alcohol
- Beta blockers may change the response.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Use it for a severe low in pregnancy.
Missed doses, overdose, and storage
If you miss a dose
Not applicable: glucagon is only used in an emergency.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Keep at room temperature in its case. Don't freeze.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Glucagon (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.