Chlorpheniramine Dosage

Medically reviewed by Drugs.com. Last updated on Jul 26, 2023.

Usual Adult Dose for Allergic Rhinitis

4 mg oral tablets: 1 tablet orally every 4 to 6 hours
Maximum dose: 6 tablets per 24 hours

12 mg extended release tablets: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup: 10 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Usual Adult Dose for Cold Symptoms

4 mg oral tablets: 1 tablet orally every 4 to 6 hours
Maximum dose: 6 tablets per 24 hours

12 mg extended release tablets: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup: 10 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Usual Adult Dose for Urticaria

4 mg oral tablets: 1 tablet orally every 4 to 6 hours
Maximum dose: 6 tablets per 24 hours

12 mg extended release tablets: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup: 10 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Usual Pediatric Dose for Allergic Rhinitis

4 mg oral tablets:
12 years and older: 1 tablet orally every 4 to 6 hours
6 to under 12 years: one-half tablet orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

12 mg extended release tablets:
12 years and older: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup:
12 years and older: 10 mL orally every 4 to 6 hours
6 to under 12 years: 5 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Usual Pediatric Dose for Cold Symptoms

4 mg oral tablets:
12 years and older: 1 tablet orally every 4 to 6 hours
6 to under 12 years: one-half tablet orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

12 mg extended release tablets:
12 years and older: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup:
12 years and older: 10 mL orally every 4 to 6 hours
6 to under 12 years: 5 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Usual Pediatric Dose for Urticaria

4 mg oral tablets:
12 years and older: 1 tablet orally every 4 to 6 hours
6 to under 12 years: one-half tablet orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

12 mg extended release tablets:
12 years and older: 1 tablet every 12 hours
Maximum dose: 2 tablets per 24 hours

2 mg/ 5 mL syrup:
12 years and older: 10 mL orally every 4 to 6 hours
6 to under 12 years: 5 mL orally every 4 to 6 hours
Maximum dose: 6 doses per 24 hours

Uses: Temporary relief of allergic and cold symptoms (runny nose, itchy nose/throat, sneezing, itchy/watery eyes).

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Precautions

CONTRAINDICATIONS: None provided

Safety and efficacy have not been established in patients younger than 6 years; this drug is not recommended for use in these patients.

Consult WARNINGS section for additional precautions.

Dialysis

Data not available

Other Comments

The 100 mg/mL injection is for IM or subcutaneous use only.
The 10 mg/mL injection is for IV, IM, or subcutaneous use.

Frequently asked questions

• Can you take antihistamines when pregnant?

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Medical Disclaimer