Rigix Tablet Dosage Guide in Pakistan

Rigix (Cetirizine) has simple, flexible dosing — once daily, with or without food. Its 24-hour duration makes it one of the most convenient allergy medicines available. This guide covers adults, children, and patients with kidney disease.

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-04-27

Dosage Guide

Quick Answer

Rigix Tablet (Cetirizine 10mg) standard adult dose is 10mg once daily. It can be taken morning or evening, with or without food. Children 6–12 years take 5mg (half tablet) once daily. Under 6 years, use Cetirizine syrup instead. In severe kidney disease (eGFR below 30), reduce to 5mg every other day.

Dose at a Glance

Adult Dose

10mg once daily

Once daily — morning or evening

Max: 10mg per day (higher doses provide no additional benefit)

Child Dose (6–12 years (under 6 — use syrup))

5mg once daily (half tablet) for ages 6–12

Once daily

Missed Dose

Take as soon as you remember. If your next dose is nearly due, skip the missed dose. Never take a double dose. As a once-daily medicine, simply resume normal dosing the next day.

Overdose

Cetirizine overdose causes extreme drowsiness, agitation, and rapid heartbeat. Seek emergency care immediately. There is no additional benefit from taking more than 10mg — higher doses only increase side effects.

Rigix Tablet Dosage (Kitni leni hai)

Rigix (Cetirizine 10mg) has one of the simplest dosing schedules of any allergy medicine — once daily, flexible timing, with or without food. Its 24-hour duration means one tablet provides all-day allergy protection.

Standard Adult Dosage

Condition	Dose	Timing
Allergic rhinitis	10mg once daily	Morning or evening
Chronic urticaria	10mg once daily	Morning or evening
Allergic conjunctivitis	10mg once daily	Any time
Acute symptoms (as needed)	10mg single dose	When symptoms occur

Maximum dose: 10mg per day — no additional benefit has been demonstrated at higher doses.

Children's Dosage (Bachon ke Liye Dose)

Age Group	Dose	Formulation
Under 2 years	Not recommended	—
2–5 years	2.5mg twice daily	Syrup (1mg/ml) only
6–12 years	5mg once daily (half tablet)	Syrup or half tablet
12 years and above	10mg once daily	Tablet

Under 6 years: The Rigix tablet is not appropriate — use Cetirizine syrup with weight-based dosing.

Timing Flexibility

Preference	When to Take	Reason
General allergy control	Morning	Allergy protection throughout the day
Drowsiness occurs	Before bed	Drowsiness aids sleep
Chronic urticaria	Evening preferred	Histamine release peaks at night

Key: Take at the same time each day — consistency builds steadier blood levels.

Special Populations (Khaas Mareezon ke Liye)

Kidney Disease (Gurdey ki Bimari)

Cetirizine is primarily excreted by the kidneys — dose must be reduced in renal impairment:

eGFR (mL/min/1.73m²)	Dose
Above 50	10mg once daily (normal)
30–50	5mg once daily
Below 30	5mg every other day (alternate days)
On dialysis	5mg once weekly — under specialist guidance only

Elderly Patients (60+ Years)

Consider starting at 5mg if drowsiness is a concern
Monitor for urinary retention, especially in men with an enlarged prostate (BPH)
Reduce to 5mg if drowsiness interferes with daily function

Liver Disease

Cetirizine is primarily renally excreted (not hepatically metabolised). Dose adjustment is generally not required for mild-to-moderate liver disease.

Pregnancy

Generally considered low-risk, but doctor guidance is essential. Avoid in the first trimester if possible.

Food Interaction

No significant food interaction — Rigix can be taken with or without meals. Alcohol must be avoided — it significantly increases sedation.

Missed Dose (Dose Bhool Jayein)

Take as soon as you remember
If your next dose is just a few hours away — skip the missed dose and resume normal dosing the next day
Never double the dose

Overdose

Cetirizine overdose symptoms:

Extreme drowsiness
Restlessness or agitation (paradoxical — especially in children)
Rapid heartbeat

Seek emergency care immediately if an overdose is taken — particularly in children.

The information in this guide is for educational purposes only. Always confirm dosing with your doctor or pharmacist.

Frequently Asked Questions

Should Rigix Tablet be taken in the morning or at night?

Either is fine. If you experience drowsiness, take it at bedtime — it will aid sleep. If no drowsiness occurs, a morning dose is perfectly fine. Consistency matters — take it at the same time each day.

Can Rigix be taken on an empty stomach?

Yes — Cetirizine absorption is not significantly affected by food. Take it with or without meals. If you have a sensitive stomach, taking it with food is fine.

What dose should children take?

Children 6–12 years: 5mg (half tablet) once daily. Under 6 years: Rigix tablet is not appropriate — use Cetirizine syrup (1mg/ml) with weight-based dosing from your doctor or pharmacist.

Does the dose change with kidney disease?

Yes. eGFR 30–50: reduce to 5mg once daily. eGFR below 30: 5mg every other day (alternate days). Rigix is primarily excreted by the kidneys — dose reduction prevents accumulation.

How long can Rigix be used continuously?

For chronic urticaria or perennial allergy, months or years of daily use is safe. For seasonal allergy, use during the allergy season. Discuss duration with your doctor or pharmacist.

Brand alternatives, same-class options, and other medicines used for the same conditions as Rigix Tablet.

Other antihistamines (allergy medicine)

Sibling medicines in the Antihistamines (Allergy Medicine) class.

All in class →

Used for the same conditions

Other medicines commonly used for fever and overlapping conditions.

Fever hub →

Sources

BNF — Cetirizine Dosage — BMJ Group & Pharmaceutical Press
WHO Model List of Essential Medicines 2023 — World Health Organization
DRAP Registered Products Database — Drug Regulatory Authority of Pakistan

Medical disclaimer

This page is for educational use only and does not replace professional medical advice. Always confirm diagnosis, dose, and interactions with a qualified doctor or pharmacist before starting or changing any medicine.