Very easy to order - I put in my request, explained my situation, a doctor read it and approved it and my prescription was processed and sent out. Very thankful this was so easy.
Up to 24-hour allergy relief, less sneezing, a less runny nose, and more comfort throughout the day.
Cetirizine
Cetirizine
Used for
Seasonal or year-round hay fever symptoms.
How to use it*
Take one 10 mg tablet once daily, with or without food.
How long to work
Relief usually begins within 1 hour and lasts 24 hours.
Common side effects*
Mild drowsiness, dry mouth, fatigue.
Who should not take it*
Avoid if you have liver or kidney issues.
Interactions*
Alcohol may worsen drowsiness.
Generic/branded.
Generic: Cetirizine
Brand: Zyrtec
* Always consult the patient leaflet for comprehensive information.
Cetirizine is a second-generation antihistamine that helps relieve symptoms of hay fever and other allergies. It works by reducing the amount of histamine in the body, which causes sneezing, itchy or watery eyes, a runny or blocked nose, and other allergy symptoms.
Yes. Cetirizine and Zyrtec contain the same active ingredient, cetirizine.
Cetirizine is a generic version, while Zyrtec is the branded version. Both work the same way to relieve hay fever and allergy symptoms.
Anyone with symptoms of hay fever or allergies can take cetirizine.
Do not take cetirizine if you:
Use with caution if you:
For a complete list of precautions and medicine interactions, consult the patient information leaflet.
Cetirizine usually starts to take effect within an hour, with the full effect often felt 1-3 hours after taking it.
Common side effects include:
Less common side effects include:
Seek immediate medical attention if you experience symptoms of an allergic reaction such as:
Cetirizine can cause drowsiness and fatigue so caution is advised when driving or operating machinery.
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.
Medically reviewed by Dr. Adrian Rawlinson
Written by our editorial team | Last reviewed January 15, 2026
Excellent 4.6/5
Very easy to order - I put in my request, explained my situation, a doctor read it and approved it and my prescription was processed and sent out. Very thankful this was so easy.
Definitely was a change in my life. I recommended because they have a clear system, low prices and follow up by real doctors. Order came on time.
SpeedyHealth was absolutely amazing, excellent, and made my treatment effortless! I would highly recommend them for future diagnosis, treatment, and purchases!
The response times were fast, they made sure I was satisfied and more importantly they believed me when I told them about the snafu with my delivery going missing.
The website is very easy to navigate. The knowledge on the website is very insightful. The prescription came very fast and was very affordable.
It was a very professional experience and service with a price that is competitive for the product,as long as it does not change I will be a true customer
It’s easier than you think
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Complete a short assessment form.
2Doctor review
A licensed doctor checks if it’s safe.
If so, your prescription is issued.
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