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Ubayd Ali

Authored by

Ubayd Ali

Superintendent Pharmacist

Registration Number: 2219322

NHS Pharmacist and founding member of HEBA, with years of experience in healthcare across innovative organisations.
Sufyan Tahir

Reviewed by

Sufyan Tahir

Clinical Governance Lead

Registration Number: 2221275

Review Date 23 March 2026
Next Review 23 March 2028
Published on 23 March 2026
Last Update 23 March 2026

Description

Cetirizine works by blocking histamine, the substance in the body responsible for allergic reactions. By preventing histamine from attaching to its receptors, it helps reduce sneezing, runny nose, itchy or watery eyes, and skin irritation. It also helps calm allergic rashes and swelling. With consistent use, it offers up to 24 hours of reliable relief.

 

Directions

Adults and children over 6 years should take 10mg once daily, or as directed by a healthcare professional. The tablet should be swallowed whole with water and can be taken with or without food. Do not exceed the recommended dose. For younger children or individuals with kidney problems, medical advice should be sought before use.

 

Ingredients

The active ingredient is Cetirizine hydrochloride 10mg per tablet. Inactive ingredients may include lactose, microcrystalline cellulose, magnesium stearate, and other excipients depending on the manufacturer. Always check the product packaging for a complete and accurate ingredient list. If you have known allergies to any components, consult a pharmacist before use.

 

Warnings

Although classed as non-drowsy, cetirizine may cause mild sleepiness in some individuals. Avoid alcohol as it can increase the likelihood of side effects. Consult a doctor before use if you are pregnant, breastfeeding, or have kidney disease. Seek medical advice if symptoms persist, worsen, or if you experience any unusual reactions.
 
 
 

Further Information

Patient Information Leaflet

Summary of Product Characteristics

Verified customer reviews

Frequently asked questions

  • What is Cetirizine used for?

    Cetirizine is used to relieve allergy symptoms such as sneezing, runny nose, itchy or watery eyes, and hives. It is commonly taken for hay fever and year-round allergies.

     

  • Does Cetirizine make you sleepy?

    Cetirizine is classed as a non-drowsy antihistamine, but some people may still feel mildly sleepy. If affected, avoid driving or operating machinery.

     

  • How long does Cetirizine take to work?

    It usually starts working within an hour of taking a dose. The effects can last for up to 24 hours.

     

  • Can I take Cetirizine every day?

    Yes, it can be taken once daily during allergy season or as recommended by a healthcare professional. Always follow the dosage instructions on the packaging.

     

  • Can children take Cetirizine?

    Children over 6 years can usually take cetirizine at the appropriate dose. For younger children, consult a doctor or pharmacist before use.
     
     
     

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