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Zirtek Allergy Solution - 200ml (Brand May Vary)

Zirtek Allergy Solution - 200ml (Brand May Vary)

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  • ✔️ Relieves hay fever, hives, and allergic rhinitis symptoms effectively
  • ✔️ Suitable for children from age 2 and adults
  • ✔️ Sugar-free formula ideal for regular daily use
  • ✔️ Starts working within 20–60 minutes of each dose
  • ✔️ 200ml supply lasts throughout the full allergy season

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Is Zirtek Allergy Solution the Right Cetirizine Liquid for Children?

 

If your child struggles to swallow tablets, or you simply want a measured, easy-to-give option during hay fever season, Zirtek Allergy Solution 200ml is worth knowing about. It contains cetirizine liquid for children at a concentration of 1mg per ml — that's cetirizine hydrochloride, a second-generation antihistamine widely used across the UK to manage allergic conditions. The NHS recognises cetirizine as one of the preferred non-drowsy antihistamines for both adults and children, and this liquid format makes accurate dosing straightforward. You can explore our full range of allergy and hay fever treatments if you're comparing options.

Zirtek Allergy Solution is sugar-free, which matters if you're giving it regularly to a child. It's suitable from age 2 upwards, and adults can use it too — particularly those who find tablets difficult. At £13.99 for 200ml, it represents a practical, longer-lasting supply compared to smaller pack sizes.

 

How Does Zirtek Allergy Solution Work in the Body?

 

Cetirizine works by selectively blocking H1 histamine receptors. When your immune system encounters an allergen — pollen, pet dander, dust mites — it releases histamine, which triggers the familiar symptoms: sneezing, itching, runny nose, and watery eyes. By blocking those receptors, cetirizine reduces the cascade of reactions before they take hold.

  • Cetirizine is absorbed quickly from the gut after an oral dose
  • It reaches peak plasma concentration within approximately one hour
  • It has a long half-life, meaning once-daily dosing is sufficient for adults and older children
  • Unlike first-generation antihistamines, it crosses the blood-brain barrier minimally, so sedation is less likely — though not impossible

 

Who Is Zirtek Allergy Solution Suitable For?

 

This solution is licensed for a broad range of patients. It's particularly useful for children who can't manage tablets, and for adults who prefer a liquid. That said, it's not appropriate for everyone — always check the label and speak to a pharmacist if you're unsure.

  • Children aged 2–6 years (with appropriate dose adjustment)
  • Children aged 6–12 years managing seasonal or perennial allergic rhinitis
  • Adults and adolescents over 12 years with hay fever, urticaria, or allergic rhinitis
  • People who have difficulty swallowing solid dosage forms

It is not suitable for children under 2 years, or for anyone with known hypersensitivity to cetirizine or hydroxyzine.

 

How Does Zirtek Allergy Solution Compare to Cetirizine Tablets?

 

Feature Zirtek Allergy Solution 200ml Cetirizine 10mg Tablets
Active ingredient Cetirizine hydrochloride 1mg/ml Cetirizine hydrochloride 10mg
Suitable age From 2 years Usually from 6 or 12 years (brand-dependent)
Sugar-free Yes Varies by brand
Dose flexibility High — measured by ml Low — fixed 10mg tablet

 

How Should You Store Zirtek Allergy Solution?

 

Store below 25°C, away from direct sunlight and out of reach of children. Once opened, check the product label for any in-use shelf-life guidance — most oral solutions should be used within a defined period after first opening. This cetirizine liquid for children does not require refrigeration, making it convenient for travel or keeping in a bag during allergy season. If you're managing multiple allergy-related conditions, our eye care range 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.

Zirtek Allergy Solution 200ml specifications
Treatment category Allergy & Hay Fever
Active ingredient Cetirizine hydrochloride 1mg/ml
Mechanism of action Selective H1 histamine receptor antagonist
Suitable for Adults and children aged 2 years and over
Pack size 200ml
Strength 1mg/ml
UK classification P (Pharmacy medicine)
Drug class Second-generation antihistamine
Preparation Oral solution
Route of administration Oral
Effective for Allergic rhinitis, hay fever, urticaria

Specifications of Zirtek Allergy Solution 200ml

 

What Is Zirtek Allergy Solution and What Is It Used For?

 

Zirtek Allergy Solution is an oral liquid antihistamine containing cetirizine hydrochloride at a concentration of 1mg per ml. It is used to relieve the symptoms of allergic conditions, including seasonal allergic rhinitis (hay fever), perennial allergic rhinitis, and chronic idiopathic urticaria (hives). The NHS lists cetirizine as a first-choice non-drowsy antihistamine for these conditions. It works by reducing the body's response to allergens such as pollen, house dust mites, animal dander, and mould spores.

The liquid format is particularly useful for younger children and for anyone who finds tablets difficult to swallow. It is sugar-free, making it suitable for regular use without contributing to dental concerns.

 

What Do You Need to Know Before Using Zirtek Allergy Solution?

 

Before giving this medicine to yourself or a child, read the following carefully. Some people should not use cetirizine, and others may need to take extra care.

Do not use Zirtek Allergy Solution if:

  • The patient is under 2 years of age
  • There is a known allergy to cetirizine hydrochloride, hydroxyzine, or any other ingredient in the solution
  • The patient has severe kidney impairment (creatinine clearance below 10ml/min)

Use with caution and speak to a pharmacist or GP if:

  • The patient has epilepsy or a history of seizures
  • There is moderate kidney impairment — a dose reduction may be needed
  • The patient has a condition that causes difficulty passing urine (e.g. spinal cord lesion or enlarged prostate)
  • You are pregnant or breastfeeding — seek medical advice before use

Possible drug interactions:

  • Alcohol — may increase sedative effects; avoid drinking alcohol while taking cetirizine
  • Other CNS depressants (e.g. sedatives, anxiolytics) — combined sedation risk
  • Ritonavir — may increase cetirizine plasma levels
  • Theophylline — may slightly reduce cetirizine clearance at high doses

 

How Should You Use Zirtek Allergy Solution?

 

Always use the measuring device supplied with the bottle to ensure an accurate dose. Do not use a household teaspoon, as this can lead to under- or over-dosing. If you're managing allergy symptoms alongside other conditions, our ear, nose, and throat range includes additional products that may help with nasal congestion.

  1. Shake the bottle gently before use if instructed on the label
  2. Measure the correct dose using the oral syringe or measuring cup provided
  3. Administer directly into the mouth or mix with a small amount of water if needed
  4. Replace the cap securely after each use
  5. Take at the same time each day to maintain consistent blood levels
Age Group Dose Frequency
Children 2–6 years 2.5ml (2.5mg) Twice daily
Children 6–12 years 5ml (5mg) Twice daily
Adults & children over 12 years 10ml (10mg) Once daily
Adults with mild–moderate renal impairment 5ml (5mg) Once daily (seek medical advice)

 

What Are the Possible Side Effects of Zirtek Allergy Solution?

 

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

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

  • Drowsiness or fatigue
  • Headache
  • Dry mouth
  • Dizziness
  • Gastrointestinal discomfort (nausea, stomach pain)

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

  • Agitation or restlessness (more common in children)
  • 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 notice swelling of the face, lips, or throat, difficulty breathing, or a sudden drop in blood pressure.

 

How Should You Store Zirtek Allergy Solution?

 

  • Store below 25°C in a dry place away from direct sunlight
  • Do not refrigerate unless the label specifically instructs you to
  • Keep the bottle tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the label
  • Do not dispose of medicines via wastewater or household waste — return unused medicine to your pharmacy

If you're looking for other products to manage allergy season, our allergy and hay fever collection includes nasal sprays, eye drops, and alternative antihistamines.

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 Zirtek Allergy Solution online in the UK?

You can buy Zirtek Allergy Solution 200ml directly from Cured Pharmacy, a GPhC-registered online pharmacy. It is available without a prescription as an over-the-counter medicine. Browse our full allergy and hay fever range for additional options including nasal sprays and antihistamine tablets.

How does cetirizine liquid for children work in the body?

Cetirizine is a second-generation antihistamine that selectively blocks H1 histamine receptors in the body. When an allergen triggers histamine release, cetirizine prevents histamine from binding to these receptors, reducing symptoms like sneezing, itching, and a runny nose. Because it crosses the blood-brain barrier minimally, it causes less sedation than older antihistamines such as chlorphenamine.

What is the correct dose of Zirtek Allergy Solution for a child?

The dose depends on the child's age. Children aged 2–6 years should receive 2.5ml twice daily, while children aged 6–12 years should take 5ml twice daily. Always use the measuring device provided with the bottle — never a household spoon — to ensure accuracy.

How quickly does Zirtek Allergy Solution start working?

Cetirizine typically begins to relieve allergy symptoms within 20 to 60 minutes of taking a dose. Peak effect is usually reached within one to two hours. For best results during hay fever season, take it at the same time each day to maintain consistent levels in the bloodstream.

Can adults take Zirtek Allergy Solution instead of tablets?

Yes, adults and young people over 12 years can take 10ml (10mg) of the solution once daily — this is equivalent to a standard cetirizine 10mg tablet. The liquid format is simply a convenient alternative for those who have difficulty swallowing tablets. There is no clinical difference in effectiveness between the two forms.

Can I give Zirtek Allergy Solution to a child under 2 years old?

No. Zirtek Allergy Solution is not licensed for use in children under 2 years of age, and it should not be given to this age group. If your child is under 2 and experiencing allergy symptoms, speak to your GP or health visitor for appropriate advice. Do not attempt to adjust the dose yourself.

What are the most common side effects of Zirtek Allergy Solution?

The most commonly reported side effects include drowsiness, headache, and dry mouth. Some people also experience dizziness or mild stomach discomfort. These effects are generally mild and tend to resolve without treatment, but contact your pharmacist if they persist or concern you.

How do I manage drowsiness caused by Zirtek Allergy Solution?

If drowsiness is a problem, try taking the dose in the evening rather than the morning, particularly for adults taking the once-daily 10ml dose. Avoid alcohol and other sedating medicines while using cetirizine. If drowsiness significantly affects your daily activities, speak to your pharmacist about alternative antihistamines.

Is Zirtek Allergy Solution safe to use during pregnancy?

The safety of cetirizine during pregnancy has not been fully established, and it is not routinely recommended without medical advice. If you are pregnant or planning to become pregnant, speak to your GP or midwife before using this medicine. They can advise on the most appropriate option for managing your allergy symptoms safely.

What happens if I miss a dose of Zirtek Allergy Solution?

If you miss a dose, take it as soon as you remember — unless it is nearly time for your next dose, in which case skip the missed dose entirely. Never take a double dose to make up for a missed one. Missing an occasional dose is unlikely to cause any harm, but consistent daily use gives the best symptom control.

How long can you use Zirtek Allergy Solution for?

For seasonal hay fever, it can be used throughout the allergy season — typically spring and summer in the UK. For year-round conditions such as perennial allergic rhinitis or chronic urticaria, longer-term use may be appropriate, but it is worth reviewing with your GP if symptoms persist beyond a few weeks or worsen. Cetirizine is generally well tolerated with continued use.

What are the alternatives to Zirtek Allergy Solution?

Common alternatives include loratadine (another non-drowsy antihistamine available as a syrup or tablet) and fexofenadine for adults. For nasal symptoms specifically, a corticosteroid nasal spray such as fluticasone may be more effective. You can explore our allergy and hay fever collection to compare available options.

Can Zirtek Allergy Solution be used for hives (urticaria)?

Yes. Cetirizine is licensed for the treatment of chronic idiopathic urticaria (hives) in adults and children aged 2 years and over. It helps to reduce itching, redness, and the appearance of wheals by blocking the histamine response in the skin. If hives are severe, widespread, or accompanied by swelling of the face or throat, seek urgent medical attention.

Does Zirtek Allergy Solution interact with any other medicines?

Cetirizine can interact with alcohol and other medicines that cause sedation, increasing the risk of drowsiness. Ritonavir (used in HIV treatment) may increase cetirizine levels in the blood. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are taking before starting cetirizine.

What are the latest findings on cetirizine use in children?

Cetirizine remains one of the most studied antihistamines in paediatric populations and continues to be recommended by the NHS as a first-line option for allergic rhinitis and urticaria in children aged 2 and over. Research consistently supports its efficacy and tolerability profile compared to first-generation antihistamines. Always follow current NHS or BNF dosing guidance and consult a healthcare professional for individual advice.

How Should You Use Zirtek Allergy Solution?

Using Zirtek Allergy Solution correctly ensures you get the most from each dose and reduces the risk of side effects. Always use the oral syringe or measuring cup supplied with the bottle — never a household teaspoon, as this can result in an inaccurate dose. The solution can be taken with or without food.

What Is the Correct Dose of Zirtek Allergy Solution?

The dose varies depending on age. It is important to follow the dosing table below and not exceed the recommended amount. For adults with kidney problems, a reduced dose may be required — speak to your pharmacist or GP for personalised guidance.

When Is the Best Time to Use Zirtek Allergy Solution?

For adults taking a once-daily dose, the evening is often a practical choice — particularly if you notice any drowsiness, as this will occur during sleep rather than during the day. For children taking twice-daily doses, spacing the doses approximately 12 hours apart (for example, morning and evening) helps maintain consistent antihistamine levels throughout the day. Taking it at the same time each day also makes it easier to remember.

During high pollen periods, taking the dose before you go outdoors — rather than waiting for symptoms to appear — can help prevent the allergic response from building up in the first place.

How Long Can You Use Zirtek Allergy Solution For?

For seasonal hay fever, use the solution throughout the pollen season, which in the UK typically runs from late March to September depending on the allergen. For perennial conditions such as dust mite or pet allergy, longer-term use may be appropriate under the guidance of a GP. If symptoms do not improve after a few weeks of regular use, or if they worsen, stop using the medicine and seek medical advice. 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 Zirtek Allergy Solution?

Most people tolerate Zirtek Allergy Solution well, but like all medicines, it can cause side effects in some individuals. Common side effects — those affecting up to 1 in 10 people — are generally mild and often resolve without any specific treatment.

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

What Are the Less Common Side Effects of Zirtek Allergy Solution?

Less common side effects affect up to 1 in 100 people. In children, agitation or restlessness is occasionally reported — this is worth being aware of if you notice a change in your child's behaviour after starting the medicine.

  • Agitation or irritability (particularly in children)
  • Paraesthesia (tingling or pins and needles)
  • Blurred vision
  • Difficulty passing urine
  • Skin rash or itching unrelated to the original allergy
  • Palpitations

What Are the Serious Side Effects of Zirtek Allergy Solution?

Serious side effects are rare but require immediate medical attention. A severe allergic reaction (anaphylaxis) to cetirizine itself is uncommon but possible. Symptoms to watch for include sudden swelling of the face, lips, tongue, or throat, difficulty breathing, a rapid drop in blood pressure, or loss of consciousness. If any of these occur, call 999 immediately. Seizures have also been reported very rarely — seek urgent medical help if this happens.

What Should You Do If You Experience Side Effects?

For mild side effects such as drowsiness or headache, these often improve as your body adjusts to the medicine. Taking the dose in the evening can help minimise daytime drowsiness. If side effects are persistent, troublesome, or unexpected, stop using the medicine and speak to your pharmacist or GP. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Zirtek Allergy Solution Interact With Other Medicines?

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

  • Alcohol — increases sedative effects; avoid during treatment
  • Sedatives, sleeping tablets, or anxiolytics — combined sedation risk
  • Ritonavir (HIV medicine) — may raise cetirizine blood levels
  • Theophylline (used for asthma) — may slightly reduce cetirizine clearance at high doses

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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