• Provides 24-hour protection from allergy symptoms
  • Starts working in one hour for fast relief
  • An affordable generic alternative to branded treatments

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Overview

Hayfever and allergies don’t have to take over your life. Cetirizine 10mg tablets provide fast, non-drowsy relief from sneezing, runny nose, itchy eyes, and congestion — so you can get back to focusing on what matters most. As the reliable generic version of Piriteze, Cetirizine offers the same trusted effectiveness at a lower cost, helping you breathe easier and feel more comfortable all day long.

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

 

What is Cetirizine 

Cetirizine hydrochloride is a trusted, modern antihistamine that works by blocking histamine — the chemical responsible for allergy symptoms like sneezing, itchy eyes and runny nose.

Whether it’s seasonal hay fever, everyday triggers like pets, dust or mould, or skin flare-ups such as hives (urticaria), cetirizine is designed to help you feel more comfortable and in control.

With relief that starts in as little as one hour and lasts for up to 24 hours from a single dose, you can get through your day without constant interruptions from allergy symptoms. And because it’s non-drowsy for most people, cetirizine lets you enjoy clear-headed, long-lasting protection you can rely on.

Directions

  • Adults and children aged 12+: One tablet daily with water
  • Take at the same time each day for consistent relief
  • Do not exceed the recommended dose
  • Can be taken with or without food
  • Always follow your prescriber’s advice.

Side Effects

Like all medicines, Cetirizine can cause side effects, although not everyone gets them. Most are mild, short-lived, and improve as your body adjusts.

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

  • Drowsiness – although Cetirizine is classed as a “non-drowsy” antihistamine, some people may still feel sleepy. If this happens, avoid driving or operating machinery until you know how it affects you.
  • Headache – mild headaches are fairly common and can often be managed with hydration, rest, or simple pain relief.
  • Dry mouth – you may notice a dry or uncomfortable feeling in your mouth. Drinking water often or chewing sugar-free gum can help.
  • Nausea – some people may feel mildly sick. Taking Cetirizine with food can sometimes reduce this effect.

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

  • Stomach pain – occasional abdominal discomfort may occur but usually passes quickly.
  • Fatigue – some people feel more tired than usual, especially when starting treatment.
  • Dizziness – rarely, cetirizine can cause light-headedness. Rising slowly from sitting or lying down can help reduce this.
     


Rare but serious (seek urgent medical help):

  • Severe allergic reaction (anaphylaxis) – symptoms include swelling of the face, lips, tongue or throat, difficulty breathing, or a sudden rash. This is extremely rare but requires immediate emergency care.


Most people tolerate Cetirizine well, and side effects (if they do occur) are generally mild and temporary. If you are concerned about symptoms, or they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet that comes with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Cetirizine may not be suitable if you:

  • Are allergic to cetirizine or related antihistamines
  • Have severe kidney impairment
  • Are pregnant or breastfeeding (seek advice first)
  • Are taking other sedating medicines (may increase drowsiness)
Frequently asked questions

  • What is cetirizine and what is it used for?

    Cetirizine is a non-drowsy antihistamine used to relieve hay fever, pet allergies, dust allergies and some skin reactions. It helps reduce sneezing, itching, watery eyes and runny nose by blocking the effect of histamine in the body.

  • How does cetirizine relieve hay fever and allergy symptoms?

    Cetirizine works by blocking histamine, the chemical released during an allergic reaction. This helps reduce itching, sneezing, watery eyes and nasal irritation. It is commonly used for seasonal allergies and mild to moderate hay fever symptoms.

  • How quickly does cetirizine start working?

    Cetirizine typically starts working within one hour, and many people feel relief sooner. Taking it once a day helps maintain steady symptom control, especially during high-pollen periods.

  • Does cetirizine cause drowsiness?

    Cetirizine is classed as non-drowsy, but a small number of people may still feel slightly sleepy. This usually settles with continued use. If it affects alertness, it may help to take it in the evening instead of the morning.

  • Can children take cetirizine safely?

    Yes. Cetirizine is commonly used in children for hay fever and other allergies. Dose depends on age, and liquid formulations are usually recommended for younger children. Always follow a clinician’s advice for anyone under 12.

  • Who should avoid taking cetirizine?

    Cetirizine may not be suitable if you have severe kidney problems, certain long-term illnesses or take sedating medicines. You should also check with a pharmacist if pregnant, breastfeeding or taking regular prescriptions.

  • Can I take cetirizine with other hay fever medicines?

    Yes. Cetirizine can be combined with nasal sprays or eye drops during pollen season. Avoid taking it with other antihistamines unless a clinician recommends it, as this may increase side effects.

  • Is cetirizine better than loratadine or fexofenadine?

    Cetirizine works well for many people and often gives faster relief than loratadine.Fexofenadine is sometimes preferred for stronger symptoms. The best choice depends on how severe your allergies are and how you respond to different antihistamines.

  • Can cetirizine help with skin allergies or hives?

    Yes. Cetirizine is commonly used to treat hives, itchy skin reactions and swelling caused by allergies. It reduces histamine-related redness and itching and may help within a few hours of taking it.

  • Does cetirizine work for pet, dust or mould allergies?

    Yes. Cetirizine can reduce symptoms from indoor allergies like dust mites, pet dander and mould. Many people take it daily if symptoms flare regularly at home or in certain environments.

  • Can I take cetirizine every day during allergy season?

    Yes. Daily use is safe and often more effective than taking it only when symptoms appear. Many people take cetirizine throughout spring and summer for steady control.

  • What happens if cetirizine makes me sleepy?

    If cetirizine makes you feel tired, try taking it in the evening. Sleepiness usually improves as your body adjusts. If it continues, fexofenadine may help.

  • Can I take cetirizine with cold or flu medicines?

    Some cold and flu medicines already contain antihistamines, so double dosing may cause side effects. A pharmacist can advise which combinations are safe depending on the product you plan to take.

  • Can I drink alcohol while taking cetirizine?

    Small amounts of alcohol are usually fine, but drinking heavily can make drowsiness more likely. If alcohol makes you feel tired or slow, it may be best to avoid it while taking cetirizine.

  • What should I do if cetirizine is not relieving my symptoms?

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