Cetirizine 10mg (Cetzine): Complete Guide for Allergies (2026)

Last reviewed by Komal Sharma, Registered Pharmacist · Rajdhani Medicos

During Delhi's pollution season (October-February) and pollen season (March-April), sneezing, runny nose, itchy eyes, and skin rashes become daily issues for millions. The most prescribed solution? Cetirizine 10mg — sold under brand names like Cetzine, Alerid, Cetiriz, and Zyrtec. This guide covers everything about cetirizine — uses, dosage, side effects, and why it's become India's go-to allergy tablet.

What is Cetirizine?

Cetirizine is a second-generation antihistamine that blocks histamine — the chemical your body releases during allergic reactions. Unlike older antihistamines (like Avil), it causes much less drowsiness.

Common brands in India:

• Cetzine (Dr. Reddy's)
• Alerid (Cipla)
• Cetiriz (Lupin)
• Zyrtec (UCB Pharma)
• Okacet (Cipla)

Key facts:

• Active ingredient: Cetirizine Hydrochloride 10 mg
• Class: Second-generation antihistamine
• Pack: Strip of 10 tablets
• Price in India: ₹15-40 per strip (varies by brand)
• Schedule: OTC (no prescription needed)

Uses of Cetirizine — What Does It Treat?

1. Allergic Rhinitis (Hay Fever)

Sneezing, runny nose, itchy eyes from pollen, dust, pet dander. Common in Delhi during pollution/pollen seasons.

2. Skin Allergies & Hives (Urticaria)

Itchy red rash, raised bumps (hives) caused by food, medicines, insect bites, or stress.

3. Chronic Idiopathic Urticaria (CIU)

Long-lasting hives without known cause. Cetirizine controls daily symptoms.

4. Itching (Pruritus)

Any skin itching — eczema, psoriasis flares, contact dermatitis.

5. Conjunctivitis (Eye Allergies)

Red, watery, itchy eyes during allergy season.

6. Mosquito/Insect Bite Reactions

Reduces swelling and itching from bites.

7. Cold Symptoms (Sometimes)

Not a cold medicine, but helps with runny nose and sneezing of viral colds.

Cetirizine Dosage — How Much to Take?

Adults (12+ years)

• 1 tablet (10 mg) once daily
• Take at night (slight drowsiness can help sleep)
• Can be taken with or without food
• For severe allergies: doctor may prescribe twice daily

Children (6-12 years)

• Half tablet (5 mg) once or twice daily under doctor guidance
• Or use Cetirizine syrup (Cetzine syrup, etc.)

Children (2-6 years)

• 2.5 mg twice daily (use syrup, not tablet)
• Always under pediatric supervision

Elderly

• Same as adults but consider 5 mg if kidney function is impaired

Best Time to Take Cetirizine

Take at night — even though cetirizine causes less drowsiness than older antihistamines, most people still feel slight sleepiness. Taking it at bedtime:

• Avoids daytime drowsiness
• Provides 24-hour coverage
• Helps you sleep through allergic symptoms

Cetirizine Side Effects

Common (usually mild)

• Drowsiness (10-15% of users)
• Dry mouth
• Mild fatigue
• Headache
• Stomach upset

Less common

• Rapid heartbeat
• Difficulty urinating
• Constipation
• Dizziness

Rare but serious

• Severe allergic reaction (rare)
• Liver problems
• Aggression or unusual mood changes (especially in children)

Most people tolerate cetirizine very well. It's safer than older antihistamines like Avil (chlorpheniramine).

Cetirizine vs Levocetirizine: Which is Better?

Verdict: Levocetirizine is the "active" half of cetirizine. If cetirizine makes you drowsy, switch to levocetirizine. For most people, cetirizine works equally well at a lower cost.

Precautions Before Taking Cetirizine

Tell your doctor if you:

• Have kidney disease (dose adjustment needed)
• Have liver disease
• Are pregnant or breastfeeding (consult doctor)
• Are about to drive long distance or operate machinery
• Take sleeping pills or anti-anxiety medicines

Avoid:

• Alcohol (increases drowsiness)
• Driving if you feel drowsy
• Combining with other antihistamines

Pregnancy: Generally considered safe (Category B) but discuss with your gynecologist.

Allergy Tips for Delhi NCR Residents

Delhi has unique allergy challenges. Combine cetirizine with these tips:

During Pollution Season (Oct-Feb)

1. Wear N95 masks outdoors (AQI often 300+ in Delhi)
2. Use air purifiers indoors with HEPA filters
3. Keep windows closed during smog days
4. Saline nasal rinse daily to clear allergens
5. Shower after coming home to wash off pollutants from skin/hair

During Pollen Season (Mar-Apr)

1. Check pollen count via apps before going out
2. Avoid outdoor activities in early morning (highest pollen)
3. Change clothes after coming indoors
4. Use sunglasses to protect eyes

Indoor Allergens (year-round)

1. Dust mites — wash bedding weekly in hot water
2. Mold — fix damp spots, especially during monsoon
3. Pet dander — vacuum frequently with HEPA filter
4. Cockroaches — Delhi's urban environment; pest control if severe

Cetirizine in Delhi NCR — Same-Day Delivery

Rajdhani Medicos delivers all major cetirizine brands across Delhi NCR:

• Cetzine 10mg
• Alerid 10mg
• Levocet 5mg (alternative)
• Cetiriz 10mg
• Cetirizine syrup for kids

Service areas: South Delhi, West Delhi, East Delhi, North Delhi, Noida, Gurgaon, Faridabad, Ghaziabad.

Free delivery above ₹499 · COD available · Same-day in 10 km radius

Order Cetirizine Now →

Frequently Asked Questions

Is cetirizine safe for daily use?

Yes, cetirizine is one of the safest antihistamines for long-term use. Many patients with chronic allergies take it daily for months/years under doctor supervision.

How long does cetirizine take to work?

30-60 minutes for initial effect. Full effect within 4 hours. Continuous protection for 24 hours.

Can I take cetirizine during pregnancy?

Cetirizine is Pregnancy Category B — generally considered safe, but always consult your doctor.

Can children take cetirizine?

Yes, from age 2+, but use the syrup form, not tablets. Dose depends on age and weight.

Does cetirizine cause weight gain?

Unlike older antihistamines (Avil), cetirizine has minimal weight gain effect. Some people report mild appetite increase.

Can I take cetirizine with paracetamol or Dolo 650?

Yes, no interaction. Often taken together for cold + allergy symptoms.

What if I take cetirizine in the morning?

You might feel slight drowsiness during the day. Avoid driving until you know how it affects you.

How is cetirizine different from Avil?

Avil (chlorpheniramine) is older — causes heavy drowsiness, dry mouth, sedation. Cetirizine is newer — much less drowsy, equally effective for allergies.

Where can I buy cetirizine near me in Delhi?

Rajdhani Medicos delivers cetirizine across Delhi NCR within 30 minutes (same-day) for areas within 10 km of Sarita Vihar. Order online or call +91 7982544355.

When to See a Doctor

Visit a doctor if:

• Allergic symptoms persist >7 days despite cetirizine
• Difficulty breathing or wheezing
• Severe swelling (face, throat) — emergency
• Hives lasting weeks (need allergy testing)
• Frequent allergy attacks (consider immunotherapy)
• Side effects worsen quality of life

Disclaimer: This article is for informational purposes only. Always consult a doctor before starting any medication, especially for children or during pregnancy.

About the reviewer: Komal Sharma is a Registered Pharmacist with the Delhi Pharmacy Council, and the consulting pharmacist for Rajdhani Medicos.

Rajdhani Medicos — Licensed online pharmacy serving Delhi NCR. Drug License RLF21DL2025003179. GSTIN 07KXQPK3422R1ZJ.