Epipen
EpiPen is a prescription auto-injector that delivers epinephrine for emergency treatment of severe allergic reactions (anaphylaxis). It is designed for immediate administration when a person experiences life-threatening allergic symptoms such as difficulty breathing, throat swelling, or severe hives. This medication does not replace professional medical care and users should seek emergency services after use.
EpiPen is an emergency epinephrine auto-injector used to treat severe, life-threatening allergic reactions by rapidly reversing symptoms like breathing difficulty and low blood pressure.
Key facts at a glance
- RxNorm
- 727341
- Generic
- Epipen
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
EpiPen is indicated for emergency treatment of severe allergic reactions (anaphylaxis) caused by allergens such as foods, medications, insect stings, or latex. It is used when individuals experience symptoms such as difficulty breathing, throat or tongue swelling, severe hives, or a drop in blood pressure that could be life-threatening.
EpiPen contains epinephrine (adrenaline), which works by binding to alpha and beta receptors throughout the body. It constricts blood vessels to increase blood pressure, reduces swelling by decreasing permeability, relaxes airway muscles to improve breathing, and helps stabilize heart function. These effects occur rapidly after intramuscular injection into the outer thigh.
EpiPen is intended for immediate emergency use and does not replace calling emergency services (911). Users should seek immediate medical attention after administration. Common side effects may include rapid heart rate, palpitations, sweating, nausea, and trembling. It should be stored at room temperature and inspected regularly for expiration. Patients should carry two auto-injectors in case a second dose is needed before medical help arrives.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy