Can I take Epipen adrenaline and Fexofenadine together?
Drug interaction guide
Originally published 14 Mar 2026
Meets Patient’s editorial guidelines
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There is no known harmful interaction between adrenaline (EpiPen) and fexofenadine. In fact, these two medicines are often used together during a severe allergic reaction (anaphylaxis). Adrenaline is the life-saving treatment used first to stop the reaction, while fexofenadine is a non-drowsy antihistamine that helps manage skin symptoms like itching or hives.
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Why this happens
Adrenaline works by narrowing blood vessels and opening the airways to treat life-threatening symptoms. Fexofenadine works by blocking histamine, a chemical released during an allergy. They work on different parts of the immune response and do not interfere with how the other is absorbed or processed by the body.
What you should do
Back to contentsIf you are experiencing a severe allergic reaction (difficulty breathing, swelling of the throat, or feeling faint), use your EpiPen immediately and call 999. Do not wait for an antihistamine like fexofenadine to work, as it is not strong enough to treat anaphylaxis on its own. You can take fexofenadine as directed by a healthcare professional once the emergency situation is under control.
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Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
14 Mar 2026 | Originally published
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