Description
Cetirizine is a second-generation antihistamine that selectively blocks H1 receptors, preventing histamine release in the body. It helps manage symptoms such as sneezing, watery eyes, runny nose, itchy throat, hives, and skin rashes. As a mast cell stabilizer, it further reduces allergic responses.
Uses
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Allergic rhinitis (sneezing, runny nose, itchy throat)
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Watery or itchy eyes
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Skin rashes and hives
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Itchy skin conditions
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Seasonal or perennial allergy symptoms
Dosage
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Adults: One tablet every 24 hours or as prescribed by a physician.
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Children: Use only if recommended by a healthcare provider.
In Case of Overdose
Overdose may lead to severe drowsiness, restlessness, nervousness, or irregular heartbeat. Immediate medical attention is necessary.
Missed Dose
If you miss a dose, take it when you remember. If it is close to the next dose, skip the missed one. Do not double the dose.
How To Use
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Swallow the tablet whole with a glass of water.
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May be taken with or without food.
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Do not crush, chew, or split the tablet.
When Not to Use
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During pregnancy if safer alternatives are available.
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If you need to drive or operate heavy machinery immediately after taking it.
Side Effects
Common Side Effects:
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Drowsiness or dizziness
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Dry mouth
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Nausea or vomiting
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Cough
Serious Side Effects (seek help immediately):
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Weakness or tremors
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Confusion
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Uneven heartbeat
Precautions & Warnings
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Use with caution during pregnancy or breastfeeding.
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Adjust dose if you have renal impairment.
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Patients with epilepsy should be monitored.
Drug Interactions
Avoid using with:
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Other Cetirizine-based medicines (oral or topical)
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Other antihistamines
Food Interactions
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Avoid alcohol as it increases drowsiness.
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High-fat meals may delay absorption but do not affect overall effectiveness.
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Caffeine may reduce the sedative effects.
Storage & Disposal
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Store in a cool, dry place away from sunlight.
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Keep out of reach of children.
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Dispose of expired tablets safely—do not flush.
Control Drug
Not a controlled substance.
Quick Tips
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Take at night if drowsiness interferes with daytime activities.
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Do not share this medicine with others, even if symptoms are similar.
Doctor’s Review
Dr. Ayesha Malik (Allergy & Immunology Specialist):
“Cetirizine is one of the most commonly prescribed antihistamines due to its quick action and minimal sedative effect compared to first-generation antihistamines. However, patients should avoid alcohol and always consult their doctor before prolonged use.”
Disclaimer
The information provided here is for educational purposes only and is not a substitute for professional medical advice. Always consult your physician or pharmacist before starting or stopping any medication. Cetirizine should be used strictly as directed by your healthcare provider.

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