• Relieves allergy symptoms quickly without causing drowsiness
  • Non-drowsy formula suitable for daytime use
  • An affordable generic alternative to branded treatments

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Overview

Hayfever isn’t just about sneezing — it can leave you drained, unfocused, and dreading the outdoors. From itchy, watery eyes to a blocked nose that keeps you up at night, the symptoms can feel relentless. Fexofenadine is a modern, non-drowsy antihistamine designed to give you fast, all-day relief from the full range of hayfever symptoms.

Working within an hour, it helps calm sneezing, clear congestion, and soothe irritation — all without making you feel sluggish or tired. That means you can stay sharp at work, enjoy time outdoors, and get back to living life on your terms. Whether you’re managing mild flare-ups or battling more persistent symptoms, Fexofenadine provides trusted, reliable relief when you need it most.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.

 

What is Fexofenadine


Fexofenadine is a modern antihistamine used to treat hayfever (seasonal allergic rhinitis). It works by blocking histamine, the chemical released during allergic reactions that causes inflammation, itching, and excess mucus.

Fast-acting relief within 1 hour


Lasts all day with a single dose


Non-drowsy formula — ideal for work, driving, or studying


Widely prescribed as a first-line treatment for moderate to severe hayfever


Fexofenadine is the generic form of Telfast, offering the same active ingredient and clinical effectiveness at a lower cost.

Directions

  • Standard adult dose: 120mg once daily for hayfever or 180mg if other strengths have proved ineffective
  • Take the tablet with water before a meal.
  • Aim to take it at the same time each day.
  • Do not exceed the prescribed dose.
  • Always follow your prescriber’s instructions.

Side Effects

Like all prescription medicines, this treatment can cause side effects, although not everyone will experience them. Most are mild, temporary, and improve as your body adjusts, but it’s important to be aware of them.

Common (may affect up to 1 in 10 people):

  • Headache – this is one of the most frequently reported side effects. It is usually mild to moderate and can often be managed by keeping well hydrated, resting, or using simple pain relief if appropriate.
  • Drowsiness (rare, but possible) – some people may feel unusually tired or sleepy. If this happens, avoid driving or operating machinery until you know how the medicine affects you.
  • Dizziness – you may occasionally feel light-headed, especially when standing up suddenly. Staying hydrated and rising slowly from a seated or lying position can help reduce this effect.
  • Nausea – a small number of people may feel sick after taking the medicine. Taking it with food or a light snack can sometimes help reduce nausea.


Uncommon (may affect up to 1 in 1000 people):

  • Insomnia – difficulty sleeping can occur in some patients. Good sleep habits, such as avoiding caffeine in the evening and keeping a regular bedtime routine, may help.
  • Nervousness – some individuals report feeling restless, anxious, or jittery. If this persists, it’s best to speak with your prescriber.
  • Dry mouth – this may be bothersome but is usually temporary. Sipping water regularly, chewing sugar-free gum, or using saliva substitutes can help relieve dryness.


Rare (seek medical advice if severe):

  • Allergic reaction – symptoms may include skin rash, itching, swelling (particularly of the face, lips, or throat), or difficulty breathing. This requires immediate medical attention. Stop taking the medicine and seek urgent help if you experience these symptoms.

Most people tolerate this treatment well, and side effects—if they occur—tend to be short-lived. If any side effect becomes bothersome, or you are worried about your symptoms, consult your doctor, pharmacist, or prescriber.


Disclaimer: This is not a complete list of side effects. For the full information, always read the patient information leaflet provided with your medicine. If you are concerned about side effects, seek medical advice. In an emergency, seek immediate medical assistance.

Warnings

Fexofenadine may not be suitable if you:

  • Are allergic to fexofenadine or any ingredients in the tablets
  • Have kidney or liver problems
  • Are pregnant or breastfeeding (only use if approved by your doctor)
  • Are taking other medicines such as erythromycin or ketoconazole (which can interact with fexofenadine)
Frequently asked questions

  • What is Fexofenadine and what is it used for?

    Fexofenadine is a non-drowsy antihistamine used to relieve hay fever, seasonal allergies and some skin allergies. It reduces sneezing, congestion, itchy eyes and runny nose. It is often recommended when symptoms are stronger or not controlled by standard antihistamines.

  • How does Fexofenadine work for hay fever and allergies?

    Fexofenadine blocks histamine, the chemical that causes allergy symptoms like sneezing, itching and watery eyes. By reducing this reaction, it helps control symptoms through the day. It is especially helpful for people with persistent or more severe hay fever.

  • How long does Fexofenadine take to start working?

    Fexofenadine usually begins working within one hour, although some people feel relief sooner. Taking it every day during your allergy season can help keep symptoms controlled more consistently.

  • What strength of Fexofenadine should I take for hay fever?

    Adults most commonly take 120mg once daily for hay fever. Stronger 180mg tablets are sometimes used for more severe symptoms or certain skin allergies. Always follow the dose recommended by a clinician or pharmacist.

  • Is Fexofenadine non-drowsy?

    Yes. Fexofenadine is classed as a non-drowsy antihistamine, and most people stay fully alert while taking it. A small number of people may still feel slightly tired, so it’s sensible to see how you feel after your first dose.

  • Who should not take Fexofenadine?

    Fexofenadine may not be suitable if you have kidney problems, take certain indigestion medicines, or use other antihistamines. It is also not recommended for children under 12 without clinical advice. Check suitability with a pharmacist if you take other medicines.

  • Can I take Fexofenadine with other hay fever treatments?

    Yes. It can be safely combined with steroid nasal sprays, saline sprays or anti-allergy eye drops. Avoid doubling up with other antihistamines unless a clinician specifically recommends it.

  • Why is Fexofenadine stronger than cetirizine or loratadine?

    Fexofenadine is often described as stronger because it provides more consistent symptom control in people with moderate to severe hay fever. It binds more selectively to histamine receptors, helping reduce sneezing, itching and watery eyes more effectively for some people.

  • Can Fexofenadine help with itchy eyes, hives or skin allergies?

    Yes. Fexofenadine is also used for urticaria, which causes itchy rashes or hives. It can reduce swelling, redness and itching within a few hours. Some people use it for both hay fever and skin allergies during high-pollen months.

  • Why does my GP sometimes prescribe 120mg or 180mg tablets?

    Different strengths target different allergy types. The 120mg dose is commonly used for hay fever, while 180mg tablets are often used for hives or stronger symptoms. The correct strength depends on your condition and response to treatment.

  • Can I take Fexofenadine every day during allergy season?

    Yes. Many people take Fexofenadine daily throughout spring and summer. Consistent daily dosing often provides better control than taking it only when symptoms appear. Speak to a clinician if you feel you need it all year round.

  • Does Fexofenadine interact with any other medicines?

    Some indigestion remedies reduce absorption, making it less effective. Leave a two-hour gap if you use them. Fexofenadine can also interact with certain antifungals or antibiotics, so always check if you take regular medicines.

  • Can I take Fexofenadine with food or fruit juice?

    You can take it with or without food, but avoid grapefruit, orange and apple juice around the same time. These juices reduce absorption and may make the medicine less effective, taking with water is preferred. 

  • What should I do if Fexofenadine is not controlling my symptoms?

    You may benefit from adding a steroid nasal spray, anti-allergy eye drops or switching to another antihistamine. Some people need combination therapy during peak pollen days. A clinician can help tailor your plan.

  • Is Fexofenadine safe long term?

    Yes. Fexofenadine is safe for long-term use when taken as directed, especially during allergy seasons. Many people use it for months each year with no issues. Speak to a clinician if you need it continuously outside pollen seasons.