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.
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.
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.