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Guaifenesin Dosage

Medically reviewed by Drugs.com. Last updated on Dec 21, 2023.

Applies to the following strengths: 200 mg/5 mL; 200 mg; 100 mg/5 mL; 50 mg/5 mL; 600 mg; 1200 mg; 400 mg; 100 mg; 800 mg; 1000 mg; 300 mg; 575 mg; 50 mg

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Cough

Immediate release formulation: 200 to 400 mg orally every 4 hours as needed, not to exceed 2.4 g/day

Sustained release formulation: 600 to 1200 mg orally every 12 hours, not to exceed 2.4 g/day

Usual Pediatric Dose for Cough

Immediate release formulation:

less than 2 years: 12 mg/kg/day orally in 6 divided doses

2 to 5 years: 50 to 100 mg orally every 4 hours as needed, not to exceed 600 mg/day

6 to 11 years: 100 to 200 mg orally every 4 hours as needed, not to exceed 1.2 g/day

12 years or older: 200 to 400 mg orally every 4 hours as needed, not to exceed 2.4 g/day

Sustained release formulation:

2 to 5 years: 300 mg orally every 12 hours, not to exceed 600 mg/day

6 to 11 years: 600 mg orally every 12 hours, not to exceed 1.2 g/day

12 years or older: 600 to 1200 mg orally every 12 hours, not to exceed 2.4 g/day

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Dialysis

Data not available

Other Comments

Guaifenesin should be administered with plenty of fluids.

Frequently asked questions

Further information

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

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