O Cet 10mg Tablet

Cetirizine (10mg)

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O Cet 10mg Tablet 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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Cetirizine (10mg)

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General Information

Contains

Cetirizine (10mg)

Marketer

Orison Pharmaceuticals

Storage

Store below 30°C

The content is shown in English

Product introduction

O Cet 10mg Tablet 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 O Cet Tablet

Treatment of Allergic conditions : O Cet 10mg Tablet helps relieve sneezing, runny nose, nasal irritation, itchy or watery eyes, skin rashes, and hives associated with allergic rhinitis and urticaria.

Benefits of O Cet Tablet

Treatment of Allergic conditions
O Cet 10mg Tablet 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 O Cet Tablet

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 O Cet

Headache
Sleepiness
Dryness in mouth

How to use O Cet Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. O Cet 10mg Tablet may be taken with or without food.

How O Cet Tablet works

O Cet 10mg Tablet 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 O Cet 10mg Tablet

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

Quick tips

Stop taking O Cet 10mg Tablet 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. O Cet 10mg Tablet may cause excessive drowsiness when taken with alcohol.

Pregnancy

CONSULT YOUR DOCTOR

Information regarding the use of O Cet 10mg Tablet during pregnancy is not available. Please consult your doctor.

Breast feeding

CAUTION

O Cet 10mg Tablet 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

O Cet 10mg Tablet may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

UNSAFE

O Cet 10mg Tablet is unsafe to use in patients with kidney disease and should be avoided.

Liver

CAUTION

O Cet 10mg Tablet should be used with caution in patients with liver disease. Dose adjustment may be needed.

Interaction with drugs

Taking O Cet 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 O Cet 10mg Tablet and what is it used for?

O Cet 10mg Tablet 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 O Cet 10mg Tablet make you sleepy and drowsy?

Yes, O Cet 10mg Tablet 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 O Cet 10mg Tablet a steroid?

No, O Cet 10mg Tablet is not a steroid. It is an antihistamine used to relieve symptoms caused by allergic reactions.

How long does it take for O Cet 10mg Tablet 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 O Cet 10mg Tablet can vary from person to person. Consult your doctor if your symptoms persist.

Can I take O Cet 10mg Tablet and fexofenadine together?

It is not advised to take multiple antihistamines together unless instructed by a doctor. Combining antihistamines like O Cet 10mg Tablet 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 O Cet 10mg Tablet?

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 O Cet 10mg Tablet 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, O Cet 10mg Tablet 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 O Cet 10mg Tablet work for insect bites and stings?

O Cet 10mg Tablet 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: Orison Pharmaceuticals
Address: No-51, Industrial Estate, Ambala Cantt, Haryana, 133006, India

Vendor Details

Country of origin: India

Lab tests offered by us

Why we need a prescription?

Home

Respiratory

Systemic Antihistamines

O Cet 10mg Tablet

O Cet 10mg Tablet

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of O Cet Tablet

Benefits of O Cet Tablet

Side effects of O Cet Tablet

How to use O Cet Tablet

How O Cet Tablet works

All substitutes for O Cet 10mg Tablet

Stanhist 10 Tablet

Cetriver 10mg Tablet

Leecet Tablet

CETcip Tablet

New Okacet Tablet

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 O Cet 10mg Tablet and what is it used for?

Does O Cet 10mg Tablet make you sleepy and drowsy?

Is O Cet 10mg Tablet a steroid?

How long does it take for O Cet 10mg Tablet to work?

Can I take O Cet 10mg Tablet and fexofenadine together?

For how long should I continue taking O Cet 10mg Tablet?

Is it safe to take O Cet 10mg Tablet daily for a year or for a long time?

Does O Cet 10mg Tablet 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

Lab tests offered by us

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