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Allergy & Hayfever Relief Cetirizine 30 Days

Allergy & Hayfever Relief Cetirizine 30 Days

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  • ✔️ Relieves sneezing, itchy eyes, and runny nose fast
  • ✔️ Once-daily 10mg dose lasts a full 24 hours
  • ✔️ Non-drowsy formula suitable for daytime use
  • ✔️ Effective for hayfever, dust mite, and pet allergies
  • ✔️ 30-day supply keeps you covered all pollen season

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Are Cetirizine Hayfever Tablets Right for You?

 

If sneezing fits, a constantly runny nose, or itchy, watering eyes are making your day miserable, you are far from alone. Hayfever affects roughly one in five people in the UK, and for many, symptoms can be debilitating during peak pollen season. Cetirizine hayfever tablets offer a once-daily, non-drowsy solution that gets to work within an hour — making them one of the most widely used antihistamines available over the counter. You can browse our full range of treatments in our allergy and hay fever collection if you want to compare options before deciding.

Each pack in this 30-day supply contains cetirizine hydrochloride 10mg tablets — the same active ingredient found in well-known branded products, at a fraction of the cost. Whether your symptoms are triggered by grass pollen, tree pollen, dust mites, or pet dander, cetirizine works to calm the allergic response quickly and reliably.

 

How Do Cetirizine Tablets Work to Relieve Allergy Symptoms?

 

Cetirizine is a second-generation antihistamine. When your immune system encounters an allergen — pollen, for example — it releases a chemical called histamine. Histamine binds to H1 receptors throughout the body, triggering the familiar cascade of sneezing, itching, and inflammation. Cetirizine works by selectively blocking those H1 receptors, preventing histamine from causing symptoms in the first place.

  • Absorbed rapidly from the gut after oral administration
  • Reaches peak plasma concentration within one hour
  • Provides up to 24 hours of symptom relief from a single dose
  • Crosses the blood-brain barrier minimally, which is why it is considered non-drowsy for most people
  • Excreted primarily via the kidneys, so caution is needed in renal impairment

 

Who Is This Product Suitable For?

 

These tablets are suitable for most adults and children aged six years and over who experience allergic symptoms. They are particularly useful if you need reliable, all-day relief without the sedation associated with older antihistamines like chlorphenamine.

  • Adults and teenagers with seasonal allergic rhinitis (hayfever)
  • Adults with perennial allergic rhinitis triggered by dust mites or pet hair
  • People with allergic skin conditions such as urticaria (hives)
  • Those who need to remain alert at work or while driving (subject to individual response)

This product is not suitable for children under six, people with severe kidney disease, or those with a known hypersensitivity to cetirizine or hydroxyzine. Always read the label before use.

 

How Does Cetirizine Compare to Other Antihistamines?

 

Feature Cetirizine 10mg (This Product) Loratadine 10mg
Generation Second-generation antihistamine Second-generation antihistamine
Dosing frequency Once daily Once daily
Onset of action Within 1 hour Within 1–3 hours
Drowsiness risk Low (may affect some individuals) Very low
Suitable from age 6 years and over 2 years and over (syrup form)

 

How Should You Store These Tablets and Are They Clinically Suitable for Long-Term Use?

 

Store your cetirizine hayfever tablets below 25°C in a dry place, away from direct sunlight and out of the reach of children. Do not use after the expiry date printed on the packaging. The tablets do not require refrigeration.

Clinically, cetirizine is well-tolerated for seasonal use throughout the hayfever season. If you find you need antihistamines year-round for perennial allergies, it is worth speaking to your GP about whether additional treatments — such as nasal corticosteroid sprays — might be appropriate alongside your tablets. If you also experience eye symptoms, our eye care collection includes antihistamine eye drops that can complement oral treatment.

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.

Allergy & Hayfever Relief Cetirizine 30 Days specifications
Treatment category Allergic rhinitis, urticaria, hayfever
Active ingredient Cetirizine hydrochloride 10mg
Mechanism of action Selective H1 histamine receptor antagonist
Effective for Sneezing, runny nose, itchy eyes, urticaria
Suitable for Adults and children aged 6 years and over
Pack size 30 tablets
Strength 10mg
UK classification P (Pharmacy medicine)
Drug class Second-generation antihistamine
Preparation Film-coated tablet
Route of administration Oral

Specifications of Allergy & Hayfever Relief Cetirizine 30 Days

 

What Is Cetirizine and What Is It Used For?

 

Cetirizine hydrochloride 10mg is an antihistamine medicine used to relieve the symptoms of allergic conditions. It is licensed in the UK for the treatment of seasonal allergic rhinitis (hayfever), perennial allergic rhinitis, and chronic idiopathic urticaria (hives). It works by blocking the action of histamine — the chemical your body releases during an allergic reaction — and is taken once daily by mouth.

Common conditions it treats include hayfever triggered by grass, tree, or weed pollen; year-round nasal allergy caused by dust mites or animal dander; and itchy skin rashes associated with urticaria. It does not cure allergies, but it significantly reduces the severity of symptoms so you can get on with your day.

 

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 this medicine if any of the following apply:

  • You are allergic to cetirizine hydrochloride, hydroxyzine, or any other ingredient in the tablet
  • You have severe kidney disease (end-stage renal impairment with creatinine clearance below 10 ml/min)
  • You are under six years of age
  • You are pregnant or breastfeeding (seek medical advice first)

Speak to your pharmacist or GP before taking cetirizine if you have epilepsy, a history of convulsions, or significant kidney problems, as your dose may need to be adjusted.

The following medicines may interact with cetirizine:

  • Alcohol — increases the risk of drowsiness
  • Sedatives, sleeping tablets, or anxiolytics — additive sedative effect
  • Other antihistamines — avoid taking more than one antihistamine at the same time
  • Theophylline (at high doses) — may slightly reduce cetirizine clearance

 

How Should You Use Cetirizine Tablets Correctly?

 

Always take cetirizine exactly as described on the label or as directed by your pharmacist. Do not exceed the stated dose. Here is how to take it:

  1. Remove one tablet from the blister pack
  2. Swallow the tablet whole with a full glass of water
  3. You can take it with or without food — it makes no difference to absorption
  4. Take it at the same time each day to maintain consistent symptom control
  5. Do not crush or chew the tablet unless the packaging states it is dispersible
Indication Age Group Dose Frequency
Hayfever / allergic rhinitis Adults and children 12+ 10mg (1 tablet) Once daily
Hayfever / allergic rhinitis Children 6–11 years 5mg (half tablet) Once daily
Urticaria (hives) Adults and children 12+ 10mg (1 tablet) Once daily
Renal impairment (mild–moderate) Adults 5mg (half tablet) Once daily — seek medical advice

If you are managing multiple allergy symptoms at once — for example, nasal congestion alongside itchy eyes — you might also find it helpful to explore our ear, nose and throat collection for complementary nasal sprays and decongestants.

 

What Are the Possible Side Effects of Cetirizine?

 

Like all medicines, cetirizine can cause side effects, although not everyone gets them. Most side effects are mild and tend to resolve on their own.

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

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

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

  • Agitation or restlessness
  • Paraesthesia (tingling or pins and needles)
  • 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 sudden severe rash after taking this medicine.

 

How Should You Store Cetirizine Tablets Safely?

 

Correct storage helps maintain the effectiveness and safety of your tablets throughout the 30-day supply. Follow these guidelines:

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

If you are looking for additional support during allergy season, our skin care collection includes creams and gels that can help soothe allergic skin reactions alongside your oral antihistamine treatment.

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 online from Cured Pharmacy, a UK GPhC-registered online pharmacy, without a prescription. They are classified as a Pharmacy (P) medicine, meaning they are available over the counter. Visit our allergy and hay fever collection to order your 30-day supply today.

How does cetirizine work in the body to relieve hayfever?

Cetirizine is a second-generation antihistamine that works by selectively blocking H1 histamine receptors in the body. When you are exposed to an allergen like pollen, your immune system releases histamine — cetirizine prevents histamine from binding to those receptors, stopping the allergic response before symptoms take hold. It reaches peak effectiveness within one hour and provides up to 24 hours of relief from a single dose.

How do I take cetirizine tablets step by step?

Take one 10mg tablet once daily, swallowed whole with a full glass of water. You can take it with or without food, and it is best taken at the same time each day to keep symptom control consistent. Do not take more than one tablet in any 24-hour period unless specifically directed by a doctor.

What is the best time of day to take cetirizine for hayfever?

There is no single "best" time — the most important thing is consistency, so pick a time that suits your routine and stick to it. Some people prefer taking it in the evening because, for those who do experience mild drowsiness, this means it occurs during sleep. Others take it in the morning so it is active during peak pollen hours, which are typically highest in the early morning and early evening.

Can cetirizine cause drowsiness and is it safe to drive?

Cetirizine is classified as a non-drowsy antihistamine, but a small number of people do experience mild sedation. The NHS advises that you should not drive or operate heavy machinery if you feel drowsy after taking it. Alcohol can increase the risk of drowsiness, so avoid drinking alcohol while taking cetirizine.

Who is eligible to take cetirizine hayfever tablets?

Cetirizine 10mg tablets are suitable for adults and children aged six years and over who experience hayfever, perennial allergic rhinitis, or urticaria. They are not suitable for children under six, people with severe kidney disease, or those with a known allergy to cetirizine or hydroxyzine. If you are pregnant, breastfeeding, or taking other medicines, speak to your pharmacist or GP before use.

What happens if I miss a dose of cetirizine?

If you forget to take your tablet, take it as soon as you remember — unless it is nearly time for your next scheduled dose, in which case simply skip the missed one. Never take two tablets at once to compensate for a missed dose. Missing an occasional dose is unlikely to cause any harm, but consistent daily use gives the best symptom control.

What are the alternatives to cetirizine for hayfever relief?

The main over-the-counter alternatives to cetirizine are loratadine and fexofenadine, both of which are also second-generation antihistamines with a low drowsiness profile. Older first-generation antihistamines like chlorphenamine are also available but cause more sedation. Your pharmacist can help you decide which is most appropriate based on your symptoms and medical history.

How long can you take cetirizine continuously for hayfever?

Cetirizine can be taken throughout the hayfever season, which in the UK typically runs from late March through to September. If you need antihistamine treatment for longer than three months continuously, it is worth discussing this with your GP to review whether additional or alternative treatments are needed. Long-term use is generally well-tolerated, but medical review is good practice.

How do I manage side effects of cetirizine tablets?

Most side effects of cetirizine are mild and short-lived. If you experience a dry mouth, sipping water regularly and chewing sugar-free gum can help. If drowsiness is a problem, try switching to an evening dose. If you develop a rash, difficulty breathing, or swelling of the face or throat, stop taking the tablets immediately and seek emergency medical attention, as these may indicate a serious allergic reaction.

Is cetirizine safe to take during pregnancy or breastfeeding?

Cetirizine is not recommended during pregnancy unless a doctor has assessed the risks and benefits and advised it is appropriate for you. The NHS advises that loratadine is generally preferred during pregnancy if an antihistamine is needed. If you are breastfeeding, cetirizine may pass into breast milk in small amounts, so always seek medical advice before taking it.

Can I take cetirizine with other medicines or supplements?

Cetirizine can interact with alcohol, sedatives, sleeping tablets, and other antihistamines, increasing the risk of drowsiness. High-dose theophylline may also slightly affect how cetirizine is processed by the body. Always tell your pharmacist about any other medicines or supplements you are taking before starting cetirizine — you can also explore our vitamins and supplements collection for products that are compatible with antihistamine use.

Does cetirizine help with allergic skin reactions like hives?

Yes — cetirizine is licensed in the UK for the treatment of chronic idiopathic urticaria (hives), as well as hayfever and allergic rhinitis. It helps reduce the itching, redness, and raised welts associated with urticaria by blocking the histamine response in the skin. If your skin symptoms are severe or persistent, speak to your GP for further assessment.

What is the difference between cetirizine and chlorphenamine for hayfever?

Cetirizine is a second-generation antihistamine, meaning it is far less likely to cause drowsiness than chlorphenamine, which is a first-generation antihistamine. Chlorphenamine acts faster but its sedative effects make it unsuitable for daytime use for most people. Cetirizine is generally preferred for daytime hayfever relief because it allows you to remain alert and functional.

What are the latest findings on cetirizine for allergy treatment?

Cetirizine remains one of the most studied and widely recommended antihistamines in clinical guidelines, including those from NICE and the British Society for Allergy and Clinical Immunology. Current evidence continues to support its efficacy and safety for seasonal and perennial allergic rhinitis in adults and children over six. There is no evidence that it loses effectiveness with prolonged use, making it a reliable choice for seasonal allergy management.

How Should You Use Cetirizine Hayfever Tablets?

Using cetirizine correctly ensures you get the most from your 30-day supply while minimising any risk of side effects. The tablets are taken orally — swallowed whole, not crushed or chewed. Follow these steps each time you take a dose:

Try to take your tablet at the same time every day. Consistent timing helps maintain steady levels of the medicine in your system, which means more reliable symptom control throughout the day.

What Is the Correct Dose of Cetirizine for Hayfever?

The dose of cetirizine depends on your age and, in some cases, your kidney function. Always follow the dosage instructions on the packaging or as directed by your pharmacist. Never exceed the maximum recommended daily dose.

Children under six years of age should not take these tablets. If you have kidney problems, speak to your GP or pharmacist before use, as your dose may need to be reduced.

When Is the Best Time to Use Cetirizine Tablets?

Cetirizine can be taken at any time of day, but timing can make a real difference to how well it works for you personally. Pollen counts in the UK tend to be highest in the early morning and again in the early evening, so taking your tablet in the morning means it is fully active during those peak periods. If you find that cetirizine makes you feel slightly drowsy, switching to an evening dose means any sedation occurs while you sleep — a simple adjustment that many people find helpful.

The key is to pick a time that fits naturally into your daily routine and stick to it. Whether that is with your morning coffee or as part of your evening wind-down, consistency is what matters most for sustained symptom relief.

How Long Can You Use Cetirizine Tablets For?

For seasonal hayfever, cetirizine is typically used throughout the pollen season — from late March to September in the UK, depending on which pollens trigger your symptoms. You can take it daily for the duration of the season without needing to take breaks. If your symptoms are year-round (perennial allergic rhinitis), longer-term use may be appropriate, but it is good practice to review this with your GP after three months of continuous use.

Cetirizine does not cause tolerance or dependence, so there is no risk of needing higher doses over time. However, if your symptoms are not adequately controlled after a few weeks of regular use, speak to your pharmacist or GP about whether additional treatments — such as a nasal corticosteroid spray — might help.

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

What Are the Most Common Side Effects of Cetirizine?

Cetirizine is generally well-tolerated, and most people complete a full course without any significant problems. That said, like all medicines, it can cause side effects in some people. Common side effects — those affecting up to 1 in 10 people — are usually mild and often resolve without any treatment.

  • Drowsiness or fatigue
  • Headache
  • Dry mouth
  • Dizziness
  • Nausea or stomach discomfort
  • Pharyngitis (sore throat)

What Are the Less Common Side Effects of Cetirizine?

Less common side effects affect fewer than 1 in 100 people. They are worth being aware of, but most are not serious and tend to resolve once your body adjusts to the medicine. If any of the following persist or bother you, speak to your pharmacist.

  • Agitation or restlessness
  • Paraesthesia (tingling or pins and needles in the hands or feet)
  • Blurred vision
  • Difficulty passing urine (urinary retention)
  • Palpitations (awareness of your heartbeat)
  • Skin rash or itching unrelated to your allergy
  • Abnormal liver function (very rare — detected on blood tests)

What Are the Serious Side Effects of Cetirizine?

Serious side effects from cetirizine are rare but can occur. The most significant risk is a severe allergic reaction (anaphylaxis or angioedema), which, while uncommon, requires immediate emergency medical attention. Stop taking cetirizine and call 999 or go to your nearest A&E if you experience any of the following:

  • Sudden swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • A sudden, widespread skin rash with blistering or peeling
  • Collapse or loss of consciousness

These reactions are very rare, but it is important to know the signs so you can act quickly if they occur.

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

For mild side effects such as a dry mouth or headache, simple self-care measures are usually enough. Sipping water regularly, chewing sugar-free gum, and resting in a cool environment can all help. If drowsiness is affecting your daily life, try switching to an evening dose — this is a common and effective adjustment. Avoid alcohol entirely while taking cetirizine, as it significantly increases the risk of sedation.

If a side effect is persistent, worsening, or causing you concern, do not simply stop taking the tablets without speaking to your pharmacist first. They can advise whether to continue, adjust your dose, or switch to an alternative antihistamine that may suit you better.

Can Cetirizine Interact With Other Medicines?

Yes — cetirizine can interact with certain other medicines, which is why it is important to tell your pharmacist about everything you are currently taking before starting treatment. The most clinically relevant interactions include alcohol (which increases drowsiness), sedatives and sleeping tablets (additive sedative effect), other antihistamines (avoid combining), and high-dose theophylline (which may slightly reduce cetirizine clearance from the body). There are no known significant interactions with most common over-the-counter pain relief or cold and flu remedies, but always check with your pharmacist if you are unsure.

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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