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Fexofenadine

Fexofenadine

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  • ✔️ Relieves hay fever sneezing, itching, and runny nose
  • ✔️ Non-drowsy formula — suitable for daytime use
  • ✔️ Treats chronic hives (urticaria) with once-daily dosing
  • ✔️ Effective for adults and children aged 12 and over
  • ✔️ Onset of action typically within one to three hours

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What Are Fexofenadine Tablets and How Do They Help?

 

If you suffer from hay fever, allergic rhinitis, or persistent itchy skin, you'll know how disruptive those symptoms can be. Sneezing fits, watery eyes, and relentless itching don't exactly make daily life easy. Fexofenadine tablets are a second-generation antihistamine widely used in the UK to relieve exactly these kinds of allergic symptoms — and unlike older antihistamines, they're far less likely to leave you feeling drowsy. You can browse our full range of treatments in our allergy and hay fever collection if you're looking for additional options alongside this medicine.

Fexofenadine hydrochloride is the active ingredient. It's available in two strengths — 120mg and 180mg — and is suitable for adults and children aged 12 and over, depending on the condition being treated. The NHS recognises fexofenadine as one of the preferred non-drowsy antihistamines for managing seasonal and perennial allergic rhinitis.

 

How Does Fexofenadine Work in the Body?

 

Histamine is the chemical your immune system releases when it encounters an allergen — pollen, dust mites, pet dander, and so on. It's histamine that causes the sneezing, itching, and inflammation you associate with an allergic reaction. Fexofenadine works by selectively blocking peripheral H1 histamine receptors, stopping histamine from binding and triggering those symptoms.

  • Selectively targets H1 receptors in peripheral tissues
  • Does not significantly cross the blood-brain barrier
  • Reduces sneezing, nasal congestion, itching, and watery eyes
  • Onset of action typically within one to three hours of taking a dose

Because it doesn't readily enter the central nervous system, fexofenadine causes significantly less sedation than first-generation antihistamines such as chlorphenamine. That makes it a practical choice if you need to drive, work, or study.

 

Who Is Fexofenadine Suitable For?

 

Fexofenadine is suitable for a broad range of people dealing with allergic conditions. It's particularly useful if you've tried other antihistamines and found them too sedating, or if you need reliable symptom control throughout the working day.

  • Adults and adolescents aged 12 and over with seasonal allergic rhinitis (hay fever)
  • Adults with chronic idiopathic urticaria (persistent hives with no identifiable cause)
  • People who need a non-drowsy option for daytime allergy management
  • Those who have not responded adequately to other antihistamines

It is not recommended for children under 12, and caution is needed in people with kidney problems, as fexofenadine is primarily excreted via the kidneys. Always speak to your pharmacist or GP if you're unsure whether it's right for you.

 

How Does Fexofenadine Compare to Other Antihistamines?

 

Feature Fexofenadine Cetirizine Loratadine
Generation Second-generation Second-generation Second-generation
Drowsiness risk Very low Low–moderate Low
Dosing frequency Once daily Once daily Once daily
Suitable for urticaria Yes (180mg) Yes Yes

 

How Should Fexofenadine Be Stored and Who Should Avoid It?

 

Store fexofenadine tablets below 25°C in a dry place, away from direct sunlight and out of reach of children. Do not use after the expiry date printed on the packaging. If you're also managing skin-related allergy symptoms, it may be worth exploring our skin care collection for complementary topical options.

Certain groups should avoid or use fexofenadine tablets with caution. These include people with severe kidney impairment, those taking antacids containing aluminium or magnesium hydroxide (which can reduce absorption), and anyone who is pregnant or breastfeeding without medical advice. Fruit juices — particularly grapefruit, orange, and apple — can significantly reduce how much fexofenadine your body absorbs, so always take it with water.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Fexofenadine specifications
Treatment category Allergy / Antihistamine
Mechanism of action Selective peripheral H1 histamine receptor antagonist
Effective for Seasonal allergic rhinitis, chronic idiopathic urticaria
Suitable for Adults and children aged 12 and over
Active ingredient Fexofenadine hydrochloride
Strengths 120mg, 180mg
UK classification P (Pharmacy medicine)
Drug class Second-generation antihistamine
Preparation Film-coated tablet
Route of administration Oral

Specifications of Fexofenadine

 

What Is Fexofenadine and What Is It Used For?

 

Fexofenadine hydrochloride belongs to a class of medicines called antihistamines. It is used to relieve the symptoms of seasonal allergic rhinitis — commonly known as hay fever — in adults and children aged 12 and over. It is also used to treat chronic idiopathic urticaria, a condition that causes persistent hives and itching on the skin without a clearly identifiable cause. The NHS lists fexofenadine among the recommended non-drowsy antihistamines for these conditions.

 

What Do You Need to Know Before Using Fexofenadine?

 

Before taking fexofenadine, it's important to check whether it is appropriate for you. Do not take this medicine if any of the following apply:

  • You are allergic to fexofenadine hydrochloride or any other ingredient in the tablet
  • You are under 12 years of age
  • You are pregnant or breastfeeding without first speaking to a doctor
  • You have severe kidney (renal) impairment — your doctor may need to adjust your dose

The following medicines and substances may interact with fexofenadine:

  • Antacids containing aluminium or magnesium hydroxide — take fexofenadine at least 2 hours before or after these
  • Erythromycin and ketoconazole — may increase fexofenadine blood levels
  • Fruit juices (grapefruit, orange, apple) — significantly reduce absorption; always take with water
  • Rifampicin — may reduce the effectiveness of fexofenadine

 

How Should You Use Fexofenadine?

 

Always take fexofenadine exactly as directed on the label or as advised by your pharmacist. Swallow the tablet whole with a full glass of water — never with fruit juice. Taking it at the same time each day helps you remember your dose and keeps levels consistent in your body.

  1. Check the packaging to confirm the correct strength for your condition
  2. Swallow the tablet whole with a full glass of water
  3. Do not crush or chew the tablet
  4. Take once daily, at the same time each day
  5. Do not take with grapefruit, orange, or apple juice
Condition Age Group Dose Frequency
Seasonal allergic rhinitis Adults and children 12+ 120mg Once daily
Chronic idiopathic urticaria Adults and children 12+ 180mg Once daily

 

What Are the Possible Side Effects of Fexofenadine?

 

Like all medicines, fexofenadine can cause side effects, although not everyone experiences them. Most side effects are mild and tend to resolve on their own. If you're also experiencing eye-related allergy symptoms such as itchy or watery eyes, you might find our eye care collection helpful alongside your antihistamine treatment.

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

  • Headache
  • Dizziness
  • Drowsiness (less common than with older antihistamines)
  • Nausea
  • Fatigue

Less common side effects (may affect up to 1 in 100 people):

  • Insomnia or sleep disturbance
  • Nervousness
  • Rapid or irregular heartbeat (palpitations)
  • Diarrhoea
  • Skin rash or itching

Rarely, fexofenadine can cause a serious allergic reaction (anaphylaxis). Signs include swelling of the face, lips, or throat, difficulty breathing, or a sudden drop in blood pressure. If this happens, stop taking the medicine and call 999 immediately.

 

How Should You Store Fexofenadine?

 

Correct storage helps maintain the quality and effectiveness of your medicine. If you're managing multiple health products at home, it's worth keeping all medicines in a dedicated, safe location. You can also explore our ear, nose and throat collection for related treatments that may complement your allergy management plan.

  • Store below 25°C in a dry place
  • Keep away from direct sunlight and moisture
  • Keep out of sight and reach of children
  • Do not use after the expiry date printed on the carton
  • Do not dispose of medicines via wastewater or household waste — return unused tablets to your pharmacy

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy fexofenadine tablets online in the UK?

You can buy fexofenadine tablets directly from Cured Pharmacy, a GPhC-registered UK online pharmacy. Simply add the product to your basket and complete your order for fast, discreet delivery to your door. We also stock a wide range of related treatments in our allergy and hay fever collection.

How does fexofenadine work in the body?

Fexofenadine selectively blocks peripheral H1 histamine receptors, preventing histamine from triggering allergy symptoms such as sneezing, itching, and a runny nose. Because it does not readily cross the blood-brain barrier, it causes significantly less drowsiness than older antihistamines like chlorphenamine. This makes it a practical choice for people who need to stay alert throughout the day.

What is the correct dose of fexofenadine for hay fever?

For adults and children aged 12 and over with hay fever (seasonal allergic rhinitis), the standard dose is 120mg once daily. For chronic idiopathic urticaria, the dose is 180mg once daily. Always read the patient information leaflet and follow the instructions provided with your specific pack.

What is the best time of day to take fexofenadine?

Fexofenadine can be taken at any time of day, but taking it at the same time each day helps maintain consistent levels in your bloodstream. Many people find taking it in the morning works well, particularly during hay fever season when pollen counts tend to peak later in the day. Always take it with a full glass of water — never with fruit juice.

Can I take fexofenadine with other medicines?

Fexofenadine can interact with certain medicines, including antacids containing aluminium or magnesium hydroxide, erythromycin, ketoconazole, and rifampicin. If you take any of these, speak to your pharmacist before starting fexofenadine. Always mention all medicines — including over-the-counter products and supplements — when seeking advice.

Who is eligible to take fexofenadine tablets?

Fexofenadine is suitable for adults and children aged 12 and over who have seasonal allergic rhinitis or chronic idiopathic urticaria. It is not recommended for children under 12, and people with severe kidney impairment should seek medical advice before use. Pregnant or breastfeeding women should consult their GP or pharmacist first.

What happens if I miss a dose of fexofenadine?

If you forget to take a dose, take it as soon as you remember — unless it is nearly time for your next scheduled dose. In that case, simply skip the missed dose and carry on as normal. Never take two doses at the same time to make up for a missed one, as this increases the risk of side effects.

How does fexofenadine compare to cetirizine for hay fever?

Both fexofenadine and cetirizine are second-generation antihistamines used to treat hay fever and allergic conditions. Fexofenadine is generally considered to have a lower risk of causing drowsiness compared to cetirizine, which can cause mild sedation in some people. The best choice depends on your individual response, so speak to your pharmacist if you're unsure which to try.

Can I take fexofenadine if I am pregnant or breastfeeding?

Fexofenadine is not recommended during pregnancy or breastfeeding unless a doctor has specifically advised it. The safety of fexofenadine in pregnancy has not been fully established in clinical studies. Always speak to your GP or midwife before taking any antihistamine if you are pregnant or nursing.

How long can I take fexofenadine for?

For seasonal hay fever, fexofenadine is typically taken throughout the allergy season, which in the UK usually runs from late March to September. For chronic idiopathic urticaria, longer-term use may be appropriate under medical supervision. If your symptoms persist beyond the expected period or worsen, speak to your GP.

Does fexofenadine cause drowsiness?

Fexofenadine is classified as a non-drowsy antihistamine because it does not readily cross the blood-brain barrier. However, a small number of people may still experience mild drowsiness, particularly when first starting the medicine. If you notice this effect, avoid driving or operating heavy machinery until you know how the medicine affects you.

Can I drink alcohol while taking fexofenadine?

The NHS advises caution with alcohol when taking antihistamines, as alcohol can enhance any sedative effects. While fexofenadine has a low drowsiness profile, combining it with alcohol may still increase the risk of dizziness or impaired concentration. It is sensible to limit alcohol intake while using this medicine.

What are the alternatives to fexofenadine for hay fever?

Common alternatives include cetirizine, loratadine, and acrivastine — all second-generation antihistamines available over the counter in the UK. Nasal corticosteroid sprays such as beclometasone are also recommended by the NHS for moderate-to-severe hay fever symptoms. You can explore a range of options in our allergy and hay fever collection.

What are the latest studies on fexofenadine?

Fexofenadine has been extensively studied since its introduction in the 1990s and remains one of the most well-evidenced non-drowsy antihistamines available. Research continues to confirm its favourable safety profile, particularly its minimal effect on cognitive function and driving ability compared to first-generation antihistamines. It is included in current NHS and NICE guidance for the management of allergic rhinitis.

How do I manage side effects of fexofenadine?

Most side effects of fexofenadine are mild and short-lived. If you experience headache, try taking the tablet with food and staying well hydrated. For nausea, taking it with a light meal may help. If you develop a rash, palpitations, or any sign of a serious allergic reaction, stop taking the medicine and seek medical advice promptly.

How Should You Use Fexofenadine?

Using fexofenadine correctly makes a real difference to how well it works. Always swallow the tablet whole with a full glass of water — never crush or chew it. Crucially, avoid taking it with fruit juices such as grapefruit, orange, or apple juice, as these can reduce the amount of medicine your body absorbs by up to 36%.

What Is the Correct Dose of Fexofenadine?

The dose you need depends on the condition you are treating and your age. The table below summarises the standard recommended doses based on NHS and BNF guidance. Do not exceed the stated dose without medical advice, and always read the patient information leaflet supplied with your pack.

When Is the Best Time to Use Fexofenadine?

There is no strict requirement to take fexofenadine at a specific time of day, but consistency matters. Taking it at the same time each morning — for example, with breakfast — helps you build a routine and ensures steady levels of the medicine in your system throughout the day. During hay fever season, morning dosing can be particularly useful as pollen counts often peak in the afternoon and evening, meaning the medicine is already working when you need it most.

If you find you're experiencing symptoms overnight or early in the morning, an evening dose may suit you better. The key is to pick a time and stick to it each day.

How Long Can You Use Fexofenadine For?

For seasonal hay fever, fexofenadine is typically used throughout the allergy season — in the UK, this generally runs from late March through to September, though this varies depending on which pollens trigger your symptoms. You can stop taking it once your symptoms resolve at the end of the season. For chronic idiopathic urticaria, longer-term use may be appropriate, but this should be reviewed regularly with your GP or pharmacist.

If your symptoms do not improve after a few days of treatment, or if they worsen at any point, seek advice from your pharmacist or GP rather than increasing your dose independently.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of Fexofenadine?

Most people tolerate fexofenadine well, and serious side effects are uncommon. That said, like all medicines, it can cause unwanted effects in some people. The most frequently reported side effects are generally mild and often resolve without any specific treatment.

  • Headache
  • Dizziness
  • Nausea
  • Fatigue or tiredness
  • Mild drowsiness (less common than with older antihistamines)

What Are the Less Common Side Effects of Fexofenadine?

A smaller number of people may experience side effects that are less frequently reported. These are still worth being aware of, particularly if you notice any new or unusual symptoms after starting treatment.

  • Insomnia or disturbed sleep
  • Nervousness or anxiety
  • Palpitations (rapid or irregular heartbeat)
  • Diarrhoea
  • Skin rash or itching
  • Dry mouth

What Are the Serious Side Effects of Fexofenadine?

Serious side effects are rare but can occur. The most significant risk is a severe allergic reaction, known as anaphylaxis. This is a medical emergency and requires immediate attention. Stop taking fexofenadine and call 999 if you experience any of the following:

  • Swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • Sudden drop in blood pressure causing dizziness or collapse
  • Severe skin reactions such as blistering or peeling

What Should You Do If You Experience Side Effects of Fexofenadine?

For mild side effects such as headache or nausea, taking the tablet with a light meal and drinking plenty of water may help. If drowsiness occurs, avoid driving or operating machinery until you know how the medicine affects you. Do not stop taking fexofenadine abruptly without speaking to your pharmacist or GP first, particularly if you are using it for chronic urticaria.

You can report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps improve medicine safety for everyone.

Can Fexofenadine Interact With Other Medicines?

Yes, fexofenadine can interact with certain medicines and substances, which may affect how well it works or increase the risk of side effects. The most clinically significant interactions include antacids containing aluminium or magnesium hydroxide, which should be taken at least two hours apart from fexofenadine. Erythromycin and ketoconazole can increase fexofenadine blood levels, while rifampicin may reduce its effectiveness. Fruit juices — particularly grapefruit, orange, and apple — can substantially reduce absorption, so always take fexofenadine with water only.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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