Cetnir Syrup

Cetirizine (NA)

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Cetnir Syrup is an antihistamine used to relieve allergy symptoms such as sneezing, runny or blocked nose, and itchy, watery eyes. It also helps reduce itching, hives, and skin reactions, including those from insect bites. It works by blocking histamine, a chemical responsible for allergic reactions.

Written By Dr. Subita Alagh, BDS,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 12 May 2026 | 02:46 PM (IST)

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General Information

Contains

Cetirizine (NA)

Marketer

Nirlife Healthcare

Storage

Store below 30°C

The content is shown in English

Product introduction

Cetnir Syrup can be taken with or without food. The dose depends on your condition and how you respond to treatment. You may take it only on days when symptoms occur, or regularly if advised for prevention. Do not stop taking it earlier than advised, as symptoms may return. Common side effects include headache, dry mouth, and sleepiness. These are usually mild and improve with time. Consult your doctor if they persist or become bothersome. Avoid alcohol while taking this medicine, as it may increase drowsiness. Before taking it, inform your doctor if you have kidney or liver problems, or if you are pregnant, breastfeeding, or elderly (above 65 years of age). Also, let your doctor know about all other medicines you are taking, as interactions may occur. Avoid driving or operating machinery if you feel sleepy or dizzy after taking this medicine.

Uses of Cetnir Syrup

Treatment of Allergic conditions : Cetnir Syrup helps relieve sneezing, runny nose, nasal irritation, itchy or watery eyes, skin rashes, and hives associated with allergic rhinitis and urticaria.

Benefits of Cetnir Syrup

Treatment of Allergic conditions
Cetnir Syrup works by blocking histamine, a substance that triggers allergic reactions. This helps relieve symptoms such as sneezing, a runny or blocked nose, itchy or watery eyes, and skin irritation, such as rashes and itching. When used regularly, it can help prevent symptom recurrence and reduce flare-ups.

Side effects of Cetnir Syrup

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Cetnir

Headache
Sleepiness
Dryness in mouth

How to use Cetnir Syrup

Take this medicine in the dose and duration as advised by your doctor. Check the label for directions before use. Measure it with a measuring cup and take it by mouth. Shake well before use. Cetnir Syrup may be taken with or without food.

How Cetnir Syrup works

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

All substitutes for Cetnir Syrup

For information purposes only. Consult a doctor before taking any medicine.

Quick tips

Stop taking Cetnir Syrup at least three days before undergoing an allergy test, as it can affect the test results.
Do not drink alcohol while taking this medicine, as alcohol can increase sleepiness.
Discontinuing the medicine after prolonged use (several months) may lead to a temporary recurrence of itching, which may persist for a few days before settling.
If you feel sleepy, you may take your dose in the evening (around 8–9 PM) after speaking with your doctor.
If you have kidney disease or reduced kidney function, you may require a lower dose. Consult your doctor before taking this medicine.
If you have a history of seizures, use this medicine with caution and consult your doctor before taking it.
If hives (urticaria) do not improve within 3 days, consult your doctor.

Safety advice

Alcohol

UNSAFE

Do not drink alcohol while you are taking this medicine. Cetnir Syrup may cause excessive drowsiness when taken with alcohol.

Pregnancy

CONSULT YOUR DOCTOR

Information regarding the use of Cetnir Syrup during pregnancy is not available. Please consult your doctor.

Breast feeding

CAUTION

Cetnir Syrup should be used with caution during breastfeeding. Breastfeeding should be held until the treatment of the mother is completed and the drug is eliminated from the body.

Driving

UNSAFE

Cetnir Syrup may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

UNSAFE

Cetnir Syrup is unsafe to use in patients with kidney disease and should be avoided.

Liver

CAUTION

Cetnir Syrup should be used with caution in patients with liver disease. Dose adjustment may be needed.

Interaction with drugs

Taking Cetnir with any of the following medicines can modify the effect of either of them and cause some undesirable side effects

Moderate

Mirtazapine (Oral Route)

Do not drive or do anything requiring concentration or alertness until you know how the medicines affect you.

Moderate

Thalidomide (Oral Route)

If concurrent use is essential, watch out for symptoms of Thalidomide side effects such as drowsiness, excessive sedation, tiredness, dizziness or slurred speech and consult your doctor if you experience them. It is advised to avoid driving or undertaking other tasks requiring skill and alertness.

Moderate

Dalteparin (Injection Route)

Your doctor may frequently monitor your blood clotting time. Cetirizine may reduce the efficacy of Dalteparin.

Moderate

Tranylcypromine (Oral Route)

Do not take Tranylcypromine with Cetirizine. If concurrent use is essential, talk to your doctor.

Mild

Betahistine (Oral Route)

Take Cetirizine with Betahistine only if prescribed by your doctor. Cetirizine may block the action of Betahistine.

Frequently asked questions

What is Cetnir Syrup and what is it used for?

Cetnir Syrup contains cetirizine hydrochloride, an antihistamine that helps reduce or prevent allergy symptoms, including runny nose, sneezing, itchy or watery eyes, and itching of the nose or throat due to upper respiratory allergies. It is also used for itching associated with chronic hives.

Does Cetnir Syrup make you sleepy and drowsy?

Yes, Cetnir Syrup can make some people feel sleepy, drowsy, or less alert. Alcohol or other sedating medicines may increase this effect. If you feel sleepy after taking it, avoid driving, operating heavy machinery, or doing activities that require full attention.

Is Cetnir Syrup a steroid?

No, Cetnir Syrup is not a steroid. It is an antihistamine used to relieve symptoms caused by allergic reactions.

How long does it take for Cetnir Syrup to work?

It usually starts working within about an hour after taking a dose, and its effects typically last about 24 hours. However, the effect of Cetnir Syrup can vary from person to person. Consult your doctor if your symptoms persist.

Can I take Cetnir Syrup and fexofenadine together?

It is not advised to take multiple antihistamines together unless instructed by a doctor. Combining antihistamines like Cetnir Syrup and fexofenadine on your own may increase side effects such as drowsiness. Talk to your doctor if symptoms are not controlled.

For how long should I continue taking Cetnir Syrup?

The duration depends on your condition and is decided by your doctor. For short-term allergy symptoms or insect bites, a few days may be sufficient. If you have persistent or seasonal allergic rhinitis or chronic hives, your doctor may advise a longer course of treatment. Always follow your doctor’s recommendation.

Is it safe to take Cetnir Syrup daily for a year or for a long time?

Some people with chronic allergies may be advised to take this medicine daily for extended periods. When taken exactly as prescribed or according to your doctor’s instructions, Cetnir Syrup is generally considered safe for long-term use. However, it should only be continued under a doctor’s supervision and for as long as needed.

Does Cetnir Syrup work for insect bites and stings?

Cetnir Syrup may help reduce itching, redness, and calm irritation and reactions caused by insect bites, stings, or mild allergic reactions. It works by blocking histamine (a substance in the body responsible for allergic reactions).

Fact Box

Chemical Class

Diphenylmethanes

Habit Forming

Therapeutic Class

RESPIRATORY

Action Class

Second-Generation H1 Antihistamines

Related lab tests

Absolute Eosinophil Count

Peripheral Smear Examination

Total IgE

References

Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 238-39.
Cetirizine. New York, New York: Pfizer Labs; 2003. [Accessed 01 Apr. 2019] (online) Available from:
Central Drugs Standard Control Organisation (CDSCO). [Accessed 01 Apr. 2019] (online) Available from:
Cetirizine [Patient Information Leaflet]. Gangtok. Sikkim: Torrent Pharmaceuticals Ltd.; 2017. [Accessed 25 Jul. 2024] (online) Available from:
Cetirizine [Product information]. Lagos. Nigeria: Lincoln Pharmaceuticals Ltd.; 2024. [Accessed 16 Jul. 2025] (online) Available from:
Cetirizine [Product information]. Gandhinagar, Gujarat: Lincoln Parenteral Limited Ltd.; [Accessed 16 Jul. 2025] (online) Available from:

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Disclaimer

Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Nirlife Healthcare
Address: 5th Floor, Commerce House 5, Near Vodafone office, Behind YMCA club, Prahaladnagar Road, Ahmedabad-380051

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Cetnir Syrup. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India

Lab tests offered by us

Why we need a prescription?

Home

Respiratory

Systemic Antihistamines

Cetnir Syrup

Cetnir Syrup

Cash on delivery

Free Return

Expiry after

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of Cetnir Syrup

Benefits of Cetnir Syrup

Side effects of Cetnir Syrup

How to use Cetnir Syrup

How Cetnir Syrup works

All substitutes for Cetnir Syrup

Fastcet Syrup

G Cet Syrup

D Cet Syrup

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Mirtazapine (Oral Route)

Thalidomide (Oral Route)

Dalteparin (Injection Route)

Tranylcypromine (Oral Route)

Betahistine (Oral Route)

Frequently asked questions

What is Cetnir Syrup and what is it used for?

Does Cetnir Syrup make you sleepy and drowsy?

Is Cetnir Syrup a steroid?

How long does it take for Cetnir Syrup to work?

Can I take Cetnir Syrup and fexofenadine together?

For how long should I continue taking Cetnir Syrup?

Is it safe to take Cetnir Syrup daily for a year or for a long time?

Does Cetnir Syrup work for insect bites and stings?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

Related lab tests

Absolute Eosinophil Count

Peripheral Smear Examination

Total IgE

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

In case of any issues, contact us

Lab tests offered by us

Related/Popular tests