Take one tablet once daily during hay fever season or whenever symptoms occur.
Take tablets with water for best results and easy swallowing.
Do not exceed one tablet in 24 hours. If you do, seek medical advice promptly.
Type of medicine | Antihistamine - second generation |
Used for | Allergic rhinitis |
Active ingredient(s) | Cetirizine dihydrochloride |
Works by | Blocking the effects of histamine |
Effective within | 1 hour |
Available as | Tablets |
Available strength | 10mg |
Usage | One tablet once a day |
Manufacturer | Blister pack |
Packaging | Various |
Storage | Store at room temperature and keep out of reach and sight from children |
Prescription required? | No |
Who can consult | Adults with allergic rhinitis |
Zyrtec is an antihistamine that helps relieve symptoms of hay fever and other allergies. It works by blocking the effects of histamine in the body, which can cause sneezing, a runny or itchy nose, watery or itchy eyes, and skin rashes.
Yes. Zyrtec and Cetirizine contain the same active ingredient, cetirizine.
Cetirizine is a generic version, whilst Zyrtec is the branded version. Both work the same way to relieve hay fever and allergy symptoms.
Anyone who experiences hay fever or allergy symptoms can take Zyrtec.
Do not take Zyrtec if you:
Use with caution if you:
For a complete list of precautions and medicine interactions, consult the patient information leaflet.
Common side effects include:
Less common side effects include:
Seek immediate medical attention if you experience symptoms of an allergic reaction:
Zyrtec can cause drowsiness and fatigue so caution is advised when driving or operating machinery.
Zyrtec begins working within 1 hour, with the full effects typically felt within 1 to 3 hours.
You will need to complete a short consultation form. This allows our doctors to check that the medicine is safe and appropriate for you.
If suitable, your treatment will be prepared and dispatched directly to you.