Guaifenesin Dosage
Medically reviewed by Drugs.com. Last updated on Jul 27, 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
- Does Mucinex help with Covid?
- Does Mucinex help you get pregnant?
- What is the dose for an adult for Robitussin DM? How many times a day?
More about guaifenesin
- Compare alternatives
- Pricing & coupons
- Reviews (295)
- Drug images
- Latest FDA alerts (4)
- Side effects
- Patient tips
- During pregnancy
- Support group
- Drug class: expectorants
- Breastfeeding
Patient resources
- Guaifenesin drug information
- Guaifenesin Extended-Release Tablets
- Guaifenesin Tablets
- Guaifenesin Granules
- Guaifenesin Liquid
Other brands
Mucinex, Robitussin Chest Congestion, Mucinex Maximum Strength, Mucus Relief, ... +20 more
Professional resources
Related treatment guides
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.