Skip to main content

Can I take Antihistamines and Ramipril together?

Drug interaction guide

Taking certain antihistamines with ramipril may increase the risk of a rare but serious allergic reaction called angioedema (swelling under the skin). Additionally, some older antihistamines can cause drowsiness, which may be worsened if ramipril lowers your blood pressure and makes you feel dizzy.

Continue reading below

Why this happens

Ramipril is an ACE inhibitor that prevents the breakdown of certain substances in the body (like bradykinin). Some antihistamines, particularly those used for hay fever or hives, might interact with the same pathways, potentially triggering sudden swelling of the face, lips, or throat. Furthermore, both drugs can have a combined effect on your alertness if the ramipril causes a drop in blood pressure.

Most modern, non-drowsy antihistamines (like cetirizine or loratadine) are generally safe to take with ramipril. However, you should seek immediate medical help if you experience any swelling of the face, lips, tongue, or throat. If you are choosing an over-the-counter antihistamine, ask your pharmacist to recommend a non-drowsy version to avoid increased tiredness.

Continue reading below

Taking 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.

Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 14 Mar 2026 | Originally published
flu eligibility checker

Ask, share, connect.

Browse discussions, ask questions, and share experiences across hundreds of health topics.

symptom checker

Feeling unwell?

Assess your symptoms online for free

Sign up to the Patient newsletter

Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.

Please enter a valid email address

By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.