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OTC · No prescriptionSystopic LabRESPIRATORY

Sizon 5 mg Tablet

Cetirizine (5mg)

Sizon 5 mg Tablet is used for treatment of Allergic conditions.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026

₹16₹1.64 per tablet
Licensed pharmacyPharmacist-verified orderDelivered across India

Key details

Salt: Cetirizine (5mg)
Available variants: tablet 5 mg 10`S
Best price: ₹16 (₹1.64 per tablet)
Prescription: Not required
Manufacturer: SYSTOPIC LAB

Ordering notes

Standard delivery across India. No same-day delivery nationally.
Chennai express delivery is possible and chargeable. Learn more
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy

Composition of Sizon 5 mg Tablet

Sizon 5 mg Tablet contains Cetirizine (5mg). It belongs to the Antihistamine / leukotriene antagonist class of medicines.

Uses of Sizon 5 mg Tablet

Treatment of Allergic conditions

Key benefits

  • In Treatment of Allergic conditions SizoN 5 Tablet provides relief from symptoms such as blocked or runny nose
  • sneezing
  • and itchy or watery eyes. It can also give relief from allergic reactions after insect bites and symptoms of hives and eczema such as rash
  • swelling
  • itching
  • and irritation. This will improve the appearance of the skin. It rarely has any serious side effects and you may only need to take it on days you have symptoms. For individuals taking it to prevent getting symptoms one should use it regularly to get the most benefit.

How Sizon 5 mg Tablet works

Sizon 5 Tablet is an antihistaminic medication. It treats allergy symptoms such as such as itching, swelling, and rashes by blocking the effects of a chemical messenger (histamine) in the body.

How to take Sizon 5 mg Tablet

Swallow the tablet whole with a glass of water. Do not chew, crush or break it unless your doctor has told you to. Take it with or without food, often in the evening. Taking it at about the same time each day helps you remember. Follow the dose and the duration written on your prescription.

Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.

Missed dose and overdose

If you miss a dose

Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.

If you take too much

An overdose of this medicine can cause severe drowsiness, a fast heartbeat, confusion and, in children, agitation and fits. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Sizon 5 mg Tablet

Most side effects of Sizon are mild and settle as the body adjusts. Reported side effects include:

  • Sleepiness

Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.

Safety advice for Sizon 5 mg Tablet

PregnancySizon 5 Tablet is probably safe to use during pregnancy.<br>Animal studies have shown low or no adverse effect on the foetus, however, there are limited human studies. Please consult your doctor.
BreastfeedingSizon 5 Tablet is probably safe to use during lactation. Limited human data suggests that the drug does not represent a significant risk to the baby.<br>Larger doses or prolonged use of Sizon 5 Tablet may cause sleepiness and other effects in the baby
AlcoholSizon 5 Tablet may cause excessive drowsiness and calmness with alcohol.
DrivingMay cause drowsiness or affect your concentration. Do not drive until you know how it affects you.
KidneySizon 5 Tablet should be used with caution in patients with kidney disease. Dose adjustment of Sizon 5 Tablet may be needed. Please consult your doctor.<br>Not recommended in patients with severe kidney disease. May cause excessive sleepiness in patients with end stage kidney disease.
LiverSizon 5 Tablet is probably safe to use in patients with liver disease. Limited data available suggests that dose adjustment of Sizon 5 Tablet may not be needed in these patients. Please consult your doctor.
Habit formingNo

Warnings and precautions

Older antihistamines cause marked drowsiness — do not drive or operate machinery until you know how this affects you. Tell your doctor promptly about any change in mood, sleep, agitation or unusual thoughts while taking montelukast; this is uncommon but recognised. This relieves the symptoms of an allergy; it does not treat the cause, and it is not a treatment for an acute asthma attack. Seek emergency care for swelling of the lips, tongue or throat, or difficulty breathing.

Do not take Sizon if

Not for anyone with a known allergy to this medicine or to any ingredient in the pack. The sedating antihistamines are not suitable for very young children, or for people with glaucoma or an enlarged prostate, without medical advice.

Interactions with other medicines

Alcohol, sleeping tablets and other sedating medicines add to the drowsiness. Tell your doctor about all cold and cough preparations — many already contain an antihistamine.

How to store Sizon 5 mg Tablet

Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.

Expert advice for Sizon 5 mg Tablet

Try giving the medicines at the same time each day, to help you remember. Your child may feel sleepy or dizzy after each dose of SizoN 5 Tablet. If this happens, make your child sit or lie down and ask them to be careful while performing tasks that require mental focus. Avoid giving SizoN 5 Tablet with fatty meals and fruit juice as both can reduce the absorption of the medicine. Dry mouth can occur as a side effect of taking SizoN 5 Tablet. Taking sips of water may help. SizoN 5 Tablet can trigger constipation in your child. Give plenty of fluids and a fiber-rich diet to your child. SizoN 5 Tablet should be avoided in children who are less than 4 years of age as there is a risk of respiratory distress. Your doctor has prescribed SizoN 5 Tablet to help relieve allergy symptoms such as itching, swelling, and rashes. It is okay to take SizoN 5 Tablet with most other medications as it has few drug interactions. Compared to other similar medications, SizoN 5 Tablet is less likely to cause sleepiness. Stop taking SizoN 5 Tablet at least three days before taking an allergy test as it can affect the test results.

Manufacturer and class

Manufacturer:
SYSTOPIC LAB
Therapeutic class:
RESPIRATORY
Drug class:
Antihistamine / leukotriene antagonist
Chemical class:
Diphenylmethanes

Substitutes for Sizon 5 mg Tablet

Medicines with the same active ingredient (Cetirizine (5mg)). Ask your doctor or pharmacist before switching brands.

MedicinePackPricevs Sizon 5 mg Tablet
Cetzine SyrupDr Reddys Laboratories Ltdsyrup · 60 Ml₹42157% more
Healcet L SyrupHEAL (INDIA) PHARMACEUTICALSsyrup · 60ML₹90448% more
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Sizon 5 mg Tablet FAQs

What is Sizon 5 mg Tablet used for?
Sizon 5 mg Tablet is commonly used for Treatment of Allergic conditions. Always follow your doctor's advice, this information is for educational purposes and not a substitute for professional medical guidance.
What is the salt in Sizon 5 mg Tablet?
Sizon 5 mg Tablet contains Cetirizine (5mg). If you are allergic to any of these active ingredients or excipients, do not take this medicine and speak to your doctor first.
How should I take Sizon 5 mg Tablet?
Swallow the tablet whole with a glass of water. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Sizon 5 mg Tablet work?
Sizon 5 Tablet is an antihistaminic medication.
Is Sizon 5 mg Tablet a prescription medicine?
No. Sizon 5 mg Tablet is available over the counter (OTC), no prescription is required. However, it is always safer to consult a doctor or pharmacist before use.
What are the common side effects of Sizon 5 mg Tablet?
The side effects reported most often with Sizon are Sleepiness. Most are mild and settle as the body adjusts; tell your doctor if any of them persist or worry you, and stop the medicine and seek help at once for a rash, swelling of the face or lips, or difficulty breathing.
Can Sizon 5 mg Tablet be taken during pregnancy?
Sizon 5 Tablet is probably safe to use during pregnancy.<br>Animal studies have shown low or no adverse effect on the foetus, however, there are limited human studies. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Sizon.
Can I drink alcohol while taking Sizon 5 mg Tablet?
Sizon 5 Tablet may cause excessive drowsiness and calmness with alcohol.
What if I miss a dose of Sizon 5 mg Tablet?
Take it as soon as you remember.
Is Sizon 5 mg Tablet habit forming?
No. Sizon 5 mg Tablet is not known to be habit forming when taken as prescribed.
How much does Sizon 5 mg Tablet cost on PingMeDoc Pharmacy?
Sizon 5 mg Tablet starts at ₹16 on PingMeDoc Pharmacy. Available in tablet 5 mg 10`S. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Sizon 5 mg Tablet?
Sizon 5 mg Tablet is manufactured by SYSTOPIC LAB. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Sizon 5 mg Tablet delivered?
Sizon 5 mg Tablet is delivered across India via our licensed pharmacy partners. Standard delivery timelines are confirmed at checkout. Chennai customers can opt for chargeable same-city express delivery.

Sizon 5 mg Tablet, Quick facts

Salt
Cetirizine (5mg)
Form
tablet
Best price
₹16 (₹1.64 per tablet)
Prescription
Not required (OTC)
Brand
SYSTOPIC LAB
Manufacturer
SYSTOPIC LAB
Therapeutic class
RESPIRATORY
Drug class
Antihistamine / leukotriene antagonist
Chemical class
Diphenylmethanes
Action class
Second-Generation H1 Antihistamines
Habit forming
No
Variants
tablet 5 mg 10`S
Delivery
Standard across India

References

The information on Sizon 5 mg Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.

  1. PingMeDoc clinical monograph library — compiled from Indian package inserts, the Indian Pharmacopoeia
  2. CDSCO schedules and standard pharmacology references. Reviewed for patient readability. This is general information, not a substitute for your doctor's advice.
  3. Central Drugs Standard Control Organisation (CDSCO), Ministry of Health & Family Welfare, Government of India, approved drug and schedule listings.
  4. National List of Essential Medicines (NLEM) 2022, Government of India.
  5. Manufacturer's package insert / prescribing information for Sizon 5 mg Tablet.
  6. World Health Organization, ATC/DDD classification and Model Formulary for the active ingredient.

Next steps

Safety disclaimer

Product information is for general awareness and does not replace professional medical advice. Always follow a clinician's guidance and upload a valid prescription when required.