Cetirizine

Up to 24-hour allergy relief, less sneezing, a less runny nose, and more comfort throughout the day.

FDA Approved Drugs

Cetirizine

10mg
30 pills Suitable for 30 days
$49.99
30 pills Suitable for 30 days
$49.99
60 pills Suitable for 60 days
$64.99
90 pills Suitable for 90 days
$79.99
$49.99 Incl. Rx and shipping

Why choose Cetrizine

  • Fast-acting – Starts relieving allergy symptoms in about 1 hour.
  • All-day relief – One tablet lasts up to 24 hours with no repeat dosing.
  • Well-tolerated – Fewer side effects than older antihistamines.
  • Proven in clinical trials – Shown to significantly reduce hay fever symptoms within days.

Good to know*

  • Common side effects include mild drowsiness and dry mouth.
  • Take at the same time each day for consistent relief.
  • Avoid alcohol and driving if you feel drowsy from this medication.

Delivery & discretion

  • Free shipping on all orders
  • Delivery in 2-3 working days
  • Need it quick: priority shipping option available in checkout
  • Comes in plain packaging

Our service

  • No insurance needed
  • No in-person doctor visit needed with our quick online consultation
  • No prescription needed
  • Reviewed by US-licensed physicians
  • Dispensed from US-licensed pharmacy
  • FDA-approved medication
Alternative treatments

How to use

Cetirizine

Take 1 tablet daily

Take 1 tablet daily

Take one 10 mg tablet once a day. It can be taken with or without food, at any time of day. .

Daily routine helps

Daily routine helps

Take it consistently at the same time each day, especially during allergy season or known exposure periods.

Relief in 1 hour

Relief in 1 hour

Most people start feeling better within 1 hour. Full symptom control typically builds with daily use.

Key facts

Cetirizine

capsules
  • 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 FAQs

What is Cetirizine and what is it used for?

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.

Is Cetirizine the same as Zyrtec?

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.

How to use

Who can use Cetirizine?

Anyone with symptoms of hay fever or allergies can take cetirizine.

Do not take cetirizine if you:

  • Have an allergy to cetirizine or any other ingredients
  • Have severe renal failure
  • Are breastfeeding

Use with caution if you:

  • Have renal insufficiency
  • Have problems passing urine
  • Have epilepsy or are at risk of seizures
  • Are pregnant or breastfeeding

For a complete list of precautions and medicine interactions, consult the patient information leaflet.

How long does it take to work?

Cetirizine usually starts to take effect within an hour, with the full effect often felt 1-3 hours after taking it.

Safety & side effects

What are the possible side effects?

Common side effects include:

  • Drowsiness
  • Diarrhoea, nausea or dry mouth
  • Dizziness
  • Headache
  • Fatigue

Less common side effects include:

  • Rash
  • Abdominal pain
  • Feeling generally unwell
  • Sore throat or cough

Seek immediate medical attention if you experience symptoms of an allergic reaction such as:

  • Swollen tongue or face
  • Difficulty breathing
  • Hives

What should I avoid while taking Cetirizine?

Cetirizine can cause drowsiness and fatigue so caution is advised when driving or operating machinery.

Buying Cetirizine

How do I buy Cetirizine online from SpeedyHealth?

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

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