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Cetirizine Allergy & Hayfever Tablets

Cetirizine Allergy & Hayfever Tablets

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  • ✔️ Relieves hayfever sneezing, itching, and runny nose fast
  • ✔️ Once-daily 10mg dose controls allergy symptoms all day
  • ✔️ Second-generation antihistamine — less likely to cause drowsiness
  • ✔️ Suitable for adults and children aged 6 years and over
  • ✔️ Effective for hayfever, hives, and year-round allergic rhinitis

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What Are Cetirizine Hayfever Tablets and How Can They Help You?

 

If sneezing fits, itchy eyes, and a constantly runny nose are making your day miserable, you are not alone. Hayfever affects around one in five people in the UK, and for many, it can seriously disrupt daily life. CuredPharmacy's Cetirizine Allergy & Hayfever Tablets contain cetirizine hydrochloride 10mg — a well-established, second-generation antihistamine that helps relieve the symptoms of hayfever and other allergic conditions quickly and reliably. Available without a prescription, these tablets are a straightforward, affordable option at just £3.99. You can browse our full range of treatments in our allergy and hay fever collection if you need additional support alongside your antihistamine.

Cetirizine is one of the most widely used antihistamines in the UK, recommended by the NHS for the relief of allergic rhinitis (hayfever), urticaria (hives), and other allergic skin reactions. Unlike older antihistamines such as chlorphenamine, cetirizine is far less likely to cause significant drowsiness at the standard dose, making it suitable for use during the day for most people.

 

How Do Cetirizine Allergy Tablets Work?

 

When your body encounters an allergen — pollen, pet dander, dust mites — it releases a chemical called histamine. Histamine binds to H1 receptors throughout the body, triggering the familiar cascade of allergy symptoms: sneezing, itching, watery eyes, and nasal congestion. Cetirizine works by selectively blocking these H1 receptors, preventing histamine from causing that reaction in the first place.

  • Cetirizine is absorbed rapidly after oral ingestion, with peak plasma concentrations reached within one hour.
  • It selectively targets peripheral H1 receptors, meaning it has minimal effect on the central nervous system compared to first-generation antihistamines.
  • Its effects last for approximately 24 hours, which is why a single daily dose is usually sufficient for adults.
  • It does not prevent the release of histamine — it simply stops histamine from binding to its receptors and triggering symptoms.

 

Who Should Use Cetirizine Allergy & Hayfever Tablets?

 

These tablets are suitable for a wide range of people dealing with allergic conditions. They are particularly useful if your symptoms are seasonal (triggered by pollen) or perennial (year-round, triggered by dust mites or pet hair). That said, they are not appropriate for everyone, so it is worth checking the guidance below before you start.

  • Adults and children aged 6 years and over
  • People with hayfever (seasonal allergic rhinitis)
  • Those with perennial allergic rhinitis caused by dust mites or animal dander
  • People experiencing urticaria (hives) or allergic skin reactions

 

How Do Cetirizine Tablets Compare to Other Antihistamines?

 

Feature Cetirizine 10mg Loratadine 10mg Chlorphenamine 4mg
Generation Second-generation Second-generation First-generation
Drowsiness risk Low (possible in some) Very low High
Dosing frequency Once daily Once daily Up to 4 times daily
Suitable age 6 years and over 2 years and over 6 years and over

 

Are Cetirizine Hayfever Tablets Suitable for Long-Term Use?

 

Cetirizine hayfever tablets can be used throughout the hayfever season or on a longer-term basis for perennial allergic conditions, provided you are not experiencing any adverse effects. The NHS advises that antihistamines are generally safe for extended use, but if your symptoms are not well controlled or you have an underlying condition such as kidney disease, it is important to speak to your pharmacist or GP before continuing. Store your tablets below 25°C in a dry place, away from direct sunlight and out of reach of children. If you also suffer from itchy or watery eyes alongside your hayfever, you might find our eye care collection helpful for additional targeted relief.

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.

Cetirizine Allergy & Hayfever Tablets specifications
Treatment category Allergy & Hayfever
Active ingredient Cetirizine hydrochloride 10mg
Mechanism of action Selective H1 histamine receptor antagonist
Drug class Second-generation antihistamine
Preparation Film-coated tablet
Route of administration Oral
Strengths 10mg
Suitable for Adults and children aged 6 years and over
UK classification General Sale List (GSL) / Pharmacy (P) medicine
Effective for Hayfever, allergic rhinitis, urticaria, allergic skin reactions

Specifications of Cetirizine Allergy & Hayfever Tablets

 

What Are Cetirizine Allergy & Hayfever Tablets and What Are They Used For?

 

Cetirizine Allergy & Hayfever Tablets contain cetirizine hydrochloride 10mg, a second-generation antihistamine used to relieve the symptoms of allergic conditions. These include hayfever (seasonal allergic rhinitis), year-round allergic rhinitis, urticaria (hives), and other allergic skin reactions such as itching caused by eczema or insect bites. Cetirizine works by blocking histamine receptors in the body, reducing the sneezing, itching, runny nose, and watery eyes that allergies cause. It is available over the counter in the UK without a prescription for adults and children aged 6 and over.

 

What Do You Need to Know Before Using Cetirizine Tablets?

 

Before taking cetirizine, it is important to check whether it is appropriate for you. Do not take these tablets if any of the following apply:

  • You are allergic to cetirizine hydrochloride, hydroxyzine, or any other ingredient in the tablet
  • You have severe kidney (renal) impairment
  • Your child is under 6 years of age
  • You are pregnant or breastfeeding (seek medical advice first)
  • You have epilepsy or a condition that increases your risk of seizures

Speak to your pharmacist or GP before taking cetirizine if you have moderate kidney impairment, as a lower dose may be needed. The following medicines and substances may interact with cetirizine:

  • Alcohol — may increase the risk of drowsiness
  • Other sedating medicines, including sleeping tablets or anxiety medication
  • Theophylline (used for asthma) — may slightly reduce cetirizine clearance from the body
  • Ritonavir (used in HIV treatment) — may increase cetirizine levels in the blood

 

How Should You Use Cetirizine Allergy & Hayfever Tablets?

 

Always take cetirizine exactly as described in the patient information leaflet or as directed by your pharmacist. Swallow the tablet whole with a glass of water. It can be taken with or without food.

  1. Check you are not contraindicated before taking your first dose.
  2. Take one tablet (10mg) once daily if you are an adult or child aged 12 and over.
  3. For children aged 6 to 11, give half a tablet (5mg) twice daily — morning and evening.
  4. Do not exceed the stated dose.
  5. Continue taking for as long as your symptoms persist, or as advised by your pharmacist.
Age Group Dose Frequency
Adults & children 12+ 10mg (1 tablet) Once daily
Children 6–11 years 5mg (½ tablet) Twice daily
Children under 6 Not recommended
Adults with renal impairment Seek medical advice

 

What Are the Possible Side Effects of Cetirizine Tablets?

 

Like all medicines, cetirizine can cause side effects, although not everyone experiences them. Most side effects are mild and tend to resolve on their own. If you are also managing skin-related allergy symptoms, you may find our skin care collection useful alongside your antihistamine treatment.

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

  • Drowsiness or fatigue
  • Dry mouth
  • Headache
  • Dizziness
  • Stomach discomfort or nausea

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

  • Agitation or restlessness
  • Paraesthesia (tingling or numbness)
  • Blurred vision
  • Difficulty passing urine
  • Skin rash or itching

Rarely, cetirizine can cause a serious allergic reaction (anaphylaxis). Seek emergency medical help immediately if you develop swelling of the face, lips, or throat, difficulty breathing, or a severe skin rash.

 

How Should You Store Cetirizine Allergy & Hayfever Tablets?

 

Correct storage helps maintain the effectiveness and safety of your tablets. For a broader range of health products you might need during allergy season, including nasal sprays and eye drops, explore our ear, nose and throat collection.

  • Store below 25°C in a dry place
  • Keep away from direct sunlight and moisture
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the packaging
  • 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 cetirizine hayfever tablets online in the UK?

You can buy cetirizine hayfever tablets directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for just £3.99. No prescription is required, as cetirizine 10mg is available over the counter for adults and children aged 6 and over. Simply add to your basket and your order will be dispatched promptly from our UK-registered pharmacy. You can also browse our full allergy and hay fever collection for complementary treatments.

How does cetirizine work in the body?

Cetirizine is a second-generation antihistamine that selectively blocks H1 histamine receptors throughout the body. When you are exposed to an allergen such as pollen, your immune system releases histamine, which binds to these receptors and triggers symptoms like sneezing, itching, and a runny nose. By blocking those receptors, cetirizine prevents histamine from causing those reactions. It reaches peak effectiveness within about one hour of taking a dose and provides relief for up to 24 hours.

How do I take cetirizine tablets step by step?

Taking cetirizine correctly is straightforward. Adults and children aged 12 and over should swallow one 10mg tablet whole with a glass of water, once daily. Children aged 6 to 11 should take half a tablet (5mg) twice daily — once in the morning and once in the evening. The tablet can be taken with or without food, and you should not exceed the recommended daily dose under any circumstances.

What is the best time of day to take cetirizine tablets?

Cetirizine can be taken at any time of day, and there is no single "best" time that applies to everyone. If you find it causes mild drowsiness, taking it in the evening before bed is a sensible approach. If you need daytime symptom control without any risk of sleepiness, taking it in the morning works well for most people. Consistency matters more than timing — try to take it at the same time each day.

What are the side effects of cetirizine tablets and how do I manage them?

The most common side effects of cetirizine include drowsiness, dry mouth, headache, and fatigue — these affect a small proportion of users and are usually mild. If drowsiness is a problem, try switching to an evening dose. Staying well hydrated can help with dry mouth. Less commonly, some people experience dizziness, stomach upset, or agitation. If you develop any serious symptoms such as difficulty breathing or severe skin reactions, stop taking the tablets and seek medical help immediately.

Who is eligible to take cetirizine allergy tablets?

Cetirizine 10mg tablets are suitable for adults and children aged 6 years and over who are experiencing hayfever, allergic rhinitis, urticaria, or other allergic reactions. They are not suitable for children under 6, people with severe kidney impairment, or those with a known allergy to cetirizine or hydroxyzine. Pregnant or breastfeeding women should consult their GP or pharmacist before use, as should anyone with epilepsy or significant kidney problems.

What happens if I miss a dose of cetirizine?

If you forget to take a dose, take it as soon as you remember — provided it is not nearly time for your next scheduled dose. If it is close to your next dose, simply skip the missed one and carry on as normal. Never take two doses at the same time to compensate for a missed one, as this increases the risk of side effects without providing additional benefit.

How does cetirizine compare to loratadine for hayfever?

Both cetirizine and loratadine are second-generation antihistamines used for hayfever, and both are taken once daily. Cetirizine may provide slightly stronger symptom relief for some people, while loratadine is generally considered to have an even lower risk of causing drowsiness. Individual responses vary, so if one does not work well for you, it is worth trying the other under pharmacist guidance. Both are available without a prescription in the UK.

Can I take cetirizine every day during hayfever season?

Yes, cetirizine can be taken daily throughout the hayfever season, which in the UK typically runs from late March to September depending on which pollens trigger your symptoms. The NHS advises that antihistamines are generally safe for continuous use during allergy season. If you need to take it year-round for perennial allergic rhinitis, speak to your pharmacist or GP to ensure it remains the right option for you.

Is cetirizine safe to take with other medicines?

Cetirizine can interact with certain medicines, so it is important to check before combining it with anything else. Alcohol and other sedating medicines — including sleeping tablets, anxiety medication, and some pain relievers — can increase the risk of drowsiness when taken alongside cetirizine. Theophylline (used for asthma) and ritonavir (used in HIV treatment) may also interact. Always tell your pharmacist about any other medicines, supplements, or herbal remedies you are taking.

Can cetirizine be used for skin allergies and hives?

Yes, cetirizine is licensed for the treatment of urticaria (hives) and other allergic skin reactions, not just hayfever. It helps relieve the itching, redness, and raised welts associated with hives by blocking the histamine response in the skin. If you are dealing with persistent or severe skin reactions, it is worth speaking to your GP, and you may also find helpful products in our skin care collection.

Does cetirizine cause drowsiness?

Cetirizine is classified as a non-drowsy antihistamine, but it can still cause drowsiness in some individuals — particularly at higher doses or when combined with alcohol. It is less sedating than first-generation antihistamines like chlorphenamine, but you should still be cautious about driving or operating heavy machinery until you know how it affects you personally. If drowsiness is a concern, taking your dose in the evening is a practical solution.

How long does it take for cetirizine to start working?

Cetirizine is absorbed relatively quickly after you take it, with peak plasma concentrations typically reached within one hour of ingestion. Most people notice a meaningful reduction in their allergy symptoms within one to two hours of their first dose. For best results during hayfever season, some people find it helpful to take cetirizine before they expect to be exposed to pollen, rather than waiting until symptoms have already started.

What are the alternatives to cetirizine for hayfever?

If cetirizine is not suitable for you or does not provide adequate relief, there are several alternatives available. Other oral antihistamines include loratadine and fexofenadine, both of which are second-generation options with low drowsiness profiles. Nasal corticosteroid sprays such as beclometasone are also highly effective for nasal symptoms. For eye symptoms, antihistamine eye drops can provide targeted relief — explore our eye care collection for options.

What are the latest findings on cetirizine for allergy treatment?

Cetirizine has been in clinical use for several decades and remains one of the most extensively studied antihistamines available. Current evidence continues to support its efficacy and safety for allergic rhinitis and urticaria in adults and children aged 6 and over. Research has consistently shown it to be more effective than placebo and comparable to other second-generation antihistamines, with a well-established tolerability profile. No major new safety concerns have emerged in recent years.

How Should You Use Cetirizine Allergy & Hayfever Tablets?

Using cetirizine correctly ensures you get the most from your treatment while minimising any risk of side effects. Always read the patient information leaflet before you start, and follow the steps below for safe, effective use.

Swallow the tablet whole with a full glass of water. Do not crush or chew the tablet unless the leaflet specifically states it is suitable to do so.

What Is the Correct Dose of Cetirizine Allergy & Hayfever Tablets?

The dose of cetirizine depends on your age and, in some cases, your kidney function. The table below summarises the standard recommended doses. If you have moderate to severe kidney impairment, speak to your GP or pharmacist before taking cetirizine, as a dose adjustment may be necessary.

When Is the Best Time to Use Cetirizine Allergy & Hayfever Tablets?

Cetirizine can be taken at any time of day, and there is no strict clinical requirement to take it at a specific hour. However, if you find it causes any mild drowsiness, taking your dose in the evening before bed is a practical way to avoid this affecting your daytime activities.

During hayfever season, some people find it beneficial to take cetirizine before anticipated pollen exposure — for example, before going outdoors on a high pollen count day — rather than waiting until symptoms have already developed. Consistent daily use tends to provide better overall symptom control than taking it only when symptoms flare.

How Long Can You Use Cetirizine Allergy & Hayfever Tablets For?

Cetirizine can be used throughout the hayfever season, which in the UK typically runs from late March through to September. For perennial allergic rhinitis or chronic urticaria, it may be used on a longer-term basis under pharmacist or GP guidance.

If your symptoms are not adequately controlled after a few weeks of regular use, or if you develop any new or worsening symptoms, speak to your pharmacist or GP. They can review whether cetirizine remains the most appropriate treatment for you or whether an alternative approach is needed.

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

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What Are the Most Common Side Effects of Cetirizine Allergy & Hayfever Tablets?

Most people tolerate cetirizine well, but like all medicines, it can cause side effects in some users. Common side effects are generally mild and often resolve without any need to stop treatment. If they persist or become bothersome, speak to your pharmacist.

  • Drowsiness or fatigue
  • Dry mouth
  • Headache
  • Dizziness
  • Nausea or stomach discomfort

What Are the Less Common Side Effects of Cetirizine Tablets?

Less common side effects occur in a smaller proportion of users — typically fewer than 1 in 100 people. They are worth being aware of, particularly if you are taking cetirizine for the first time or have recently increased your dose.

  • Agitation or restlessness
  • Paraesthesia (tingling or pins and needles)
  • Blurred vision
  • Difficulty passing urine (urinary retention)
  • Skin rash or itching unrelated to your allergy
  • Palpitations
  • Abnormal liver function (very rare)

What Are the Serious Side Effects of Cetirizine Tablets?

Serious side effects from cetirizine are rare, but they do occur in a very small number of people. The most significant risk is a severe allergic reaction (anaphylaxis), which requires immediate emergency medical attention. Do not ignore the following symptoms if they develop after taking cetirizine.

  • Swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • Severe skin rash, blistering, or peeling
  • Rapid or irregular heartbeat
  • Collapse or loss of consciousness

If you experience any of these symptoms, stop taking cetirizine immediately and call 999 or go to your nearest A&E department.

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

For mild side effects such as drowsiness or dry mouth, simple adjustments can help. Try switching to an evening dose if daytime drowsiness is a problem, and drink plenty of water throughout the day to ease dry mouth. Avoid alcohol while taking cetirizine, as it can worsen sedation.

If side effects are persistent, worsening, or affecting your quality of life, stop taking the tablets and speak to your pharmacist or GP. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Cetirizine Interact With Other Medicines?

Yes, cetirizine can interact with certain medicines and substances, which may increase the risk or severity of side effects. Always inform your pharmacist or GP about everything you are currently taking before starting cetirizine.

  • Alcohol — significantly increases drowsiness risk
  • Sedating medicines (sleeping tablets, benzodiazepines, opioid pain relief) — additive sedation
  • Theophylline — may slightly reduce cetirizine clearance from the body
  • Ritonavir (HIV medication) — may increase cetirizine blood levels
  • Other antihistamines — avoid combining, as this increases side effect risk without additional benefit

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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