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Guaifenesin / Phenylephrine Dosage

Medically reviewed by Drugs.com. Last updated on Oct 31, 2018.

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; 650 mg-23.75 mg; 1000 mg-30 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:
-Current use of a monoamine oxidase inhibitor (MAOI) or use within 14 days of stopping a MAOI.

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.

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