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Guaifenesin / Phenylephrine Dosage

Medically reviewed by Drugs.com. Last updated on Nov 6, 2023.

Applies to the following strengths: 100 mg-5 mg/5 mL; 200 mg-25 mg; 50 mg-2.5 mg/5 mL; 300 mg-20 mg; 600 mg-30 mg; 20 mg-1.5 mg/mL; 900 mg-25 mg; 400 mg-10 mg; 100 mg-7.5 mg/5 mL; 600 mg-40 mg; 600 mg-20 mg; 1200 mg-40 mg; 375 mg-20 mg; 275 mg-25 mg; 1200 mg-30 mg; 900 mg-30 mg; 1200 mg-25 mg; 600 mg-15 mg; 200 mg-40 mg; 600 mg-25 mg; 1000 mg-30 mg; 650 mg-23.75 mg; 835 mg-30 mg; 200 mg-7.5 mg/5 mL; 600 mg-12.5 mg; 395 mg-10 mg; 380 mg-10 mg; 200 mg-5 mg; 390 mg-10 mg; 385 mg-10 mg; 600 mg-10 mg; 400 mg-15 mg; 300 mg-10 mg; 400 mg-30 mg; 800 mg-25 mg; 200 mg-5 mg/5 mL; 50 mg-2.5 mg/mL; 100 mg-2.5 mg/5 mL; 800 mg-40 mg; 200 mg-7.5 mg; 388 mg-10 mg; 650 mg-25 mg; 800 mg-20 mg; 835 mg-25 mg; 1100 mg-30 mg; 600 mg-18 mg; 650 mg-40 mg; 315 mg-20 mg; 1200 mg-35 mg; 800 mg-30 mg; 1000 mg-40 mg; 100 mg-10 mg/5 mL; 75 mg-7.5 mg/5 mL; 1200 mg-20 mg; 550 mg-8.5 mg; 1050 mg-30 mg

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Cough and Nasal Congestion

Dose referred to by strength of guaiFENesin/phenylephrine (in mg) per unit of measurement:

Oral liquids:
100/5 per 5 mL:10 mL every 4 hours, maximum 6 doses per day

Oral tablets:
385/10 per tablet: 1 tablet every 4 hours, maximum 6 doses per day

388/10 per tablet: 1 tablet every 4 hours, maximum 6 doses per day

395/10 per tablet: 1 tablet every 4 hours, maximum 6 doses per day

Usual Pediatric Dose for Cough and Nasal Congestion

Dose referred to by strength of guaiFENesin/phenylephrine (in mg) per unit of measurement:

Oral liquids:
50/2.5 per 1 mL:
2 to under 6 years: 1 mL every 4 hours, maximum 6 doses per day

100/5 per 5 mL:
12 years and older: 10 mL every 4 hours, maximum 6 doses per day
6 to under 12 years: 5 mL every 4 hours, maximum 6 doses per day

Oral tablets:
385/10 per tablet:
12 years and older: 1 tablet every 4 hours, maximum 6 doses per day
6 to under 12 years: 1/2 tablet every 4 hours, maximum 6 doses per day

388/10 per tablet:
12 years and older: 1 tablet every 4 hours, maximum 6 doses per day
6 to under 12 years: 1/2 tablet every 4 hours, maximum 6 doses per day

395/10 per tablet:
12 years and older: 1 tablet every 4 hours, maximum 6 doses per day
6 to under 12 years: 1/2 tablet every 4 hours, maximum 6 doses per day

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Precautions

CONTRAINDICATIONS:


Safety and efficacy have not been established in patients younger than 6 years.

Consult WARNINGS section for additional precautions.

Dialysis

Data not available

Further information

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

Medical Disclaimer