--- title: "Fexofenadine: Uses & Side Effects | HealthAnswers" description: "Fexofenadine is a non-drowsy antihistamine for hay fever and hives — dosing tips, why fruit juice reduces absorption, and when to see a GP." url: https://healthanswers.co.uk/treatments/fexofenadine/ robots: noindex --- # Fexofenadine: Uses & Side Effects | HealthAnswers Treatments Fexofenadine is a non-drowsy antihistamine for hay fever and hives — dosing tips, why fruit juice reduces absorption, and when to see a GP. Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026 ## Quick answer What is fexofenadine used for? Fexofenadine is a non-drowsy antihistamine that blocks histamine to ease hay fever and hives (urticaria). Take it with water — fruit juice can reduce absorption. It causes less sedation than older antihistamines, but check how it affects you before driving. See a GP if symptoms stay uncontrolled. ## Who is this page for? This page is for people in the UK who want a plain-English overview of Fexofenadine, including when to seek help and what NHS care usually involves. It explains general information, not what is wrong with you personally. ## Who should skip this page? Skip this page if you need a diagnosis, a prescription, or emergency care. It cannot replace a GP, pharmacist, NHS 111 or 999. If you are in immediate danger, call 999; for urgent advice that is not life-threatening, call 111 in England, Scotland or Wales, or use your GP out-of-hours service in Northern Ireland. On this page 5 sections ## Key facts about fexofenadine - Second-generation antihistamine used for hay fever and chronic hives. - Usually taken once daily — doses for hives are often higher than for hay fever. - Less sedating than older antihistamines such as chlorphenamine. - Avoid grapefruit, orange or apple juice close to a dose. - Discuss use in pregnancy with a GP or pharmacist — loratadine is sometimes preferred. ## What fexofenadine is Fexofenadine is a **non-drowsy antihistamine**. It blocks H1 histamine receptors that drive sneezing, itchy eyes, a runny nose and the raised itchy wheals of hives (urticaria). It is a second-generation antihistamine, so it is less likely to cause heavy sedation than older medicines such as chlorphenamine — though a few people still feel slightly sleepy. ## What it treats Fexofenadine is used for: - Hay fever (seasonal allergic rhinitis) — sneezing, itchy eyes and nose, runny nose - Hives (urticaria) — itchy wheals; chronic spontaneous urticaria often needs a higher dose under advice It does not treat asthma on its own. If you wheeze or feel breathless, follow your asthma plan and seek medical advice. ## How to take it Most adults take fexofenadine once daily. Follow the pack or your prescription — doses for chronic hives are often higher than standard hay fever doses. Swallow tablets with **water**. Do not take them with fruit juice. Try to take doses at a consistent time. If you miss one, take it when you remember unless it is nearly time for the next dose. ## Side effects Headache is the most reported side effect. Dry mouth and mild drowsiness can occur. Serious allergic reactions to the medicine itself are rare. Even when a medicine is labelled non-drowsy, judge how you feel before driving or using machinery, especially when you first start. ## When fexofenadine is not enough For hay fever, adding a steroid nasal spray (such as beclometasone or fluticasone from a pharmacy) often helps blocked nose and inflammation that antihistamines alone do not fully control. Eye drops can ease itchy eyes. See a GP if symptoms persist despite regular treatment, if hives keep returning for weeks, or if you need tablets most days year-round. A GP may review triggers, adjust treatment, or refer to an allergy clinic. Allergen immunotherapy is sometimes considered for severe hay fever that does not respond to standard medicines. ## ! Important safety information for fexofenadine Fexofenadine is available from pharmacies and on prescription. See a GP if allergy symptoms are not controlled, keep disrupting sleep or work, or you develop swelling of the lips or tongue. Call **999** or go to A&E for signs of anaphylaxis — sudden breathing difficulty, wheeze, collapse, or widespread swelling. Call **111** if you need urgent advice and are unsure what to do. ## Common questions about fexofenadine Is fexofenadine better than cetirizine or loratadine? All three are non-drowsy options for many people, and response varies. If one antihistamine does not help after a fair trial, switching to another is reasonable. A pharmacist can advise on dose and combinations with nasal sprays. Why should I avoid fruit juice with fexofenadine? Grapefruit, orange and apple juice can reduce how much fexofenadine your gut absorbs, making it less effective. Take tablets with water and leave a gap before drinking fruit juice. Should I take fexofenadine every day in pollen season? For hay fever, daily use through the season often works better than waiting until symptoms flare. For chronic hives, regular daily dosing is usually recommended rather than as-needed use. Can I take fexofenadine in pregnancy or while breastfeeding? Safety data for fexofenadine in pregnancy are more limited than for some other antihistamines, so loratadine or cetirizine are often considered first. Always check with a GP or pharmacist before taking any antihistamine while pregnant or breastfeeding. Can children take fexofenadine? Age limits and doses depend on the product. Check the pack and ask a pharmacist — do not give adult doses to children. ## Sources - [NHS — Fexofenadine](https://www.nhs.uk/medicines/fexofenadine/) - [NHS — Hay fever](https://www.nhs.uk/conditions/hay-fever/)