Acetaminophen / Dextromethorphan / Guaifenesin / Phenylephrine Dosage
Medically reviewed by Drugs.com. Last updated on Sep 7, 2023.
Applies to the following strengths: 325 mg-10 mg-200 mg-5 mg; 325 mg-10 mg-200 mg-5 mg/15 mL; 650 mg-20 mg-400 mg-10 mg/20 mL; 325 mg-10 mg-100 mg-5 mg; 500 mg-20 mg-400 mg-10 mg; 325 mg-15 mg-200 mg-5 mg; 325 mg-10 mg-200 mg-5 mg/10 mL; 650 mg-20 mg-400 mg-10 mg; 162.5 mg-5 mg-100 mg-2.5 mg
Usual Adult Dose for:
Usual Pediatric Dose for:
Additional dosage information:
Usual Adult Dose for Cold Symptoms
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per tablet: 2 tablets every 4 hours
Maximum dose: 5 doses (10 tablets) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per softgel: 2 softgels every 4 hours
Maximum dose: 6 doses (12 softgels) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 10 mL liquid: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 15 mL liquid: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 20 mL liquid: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 30 mL liquid: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Usual Adult Dose for Influenza
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per tablet: 2 tablets every 4 hours
Maximum dose: 5 doses (10 tablets) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per softgel: 2 softgels every 4 hours
Maximum dose: 6 doses (12 softgels) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 10 mL liquid: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 15 mL liquid: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 20 mL liquid: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 30 mL liquid: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Usual Pediatric Dose for Cold Symptoms
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per tablet:
12 years and older: 2 tablets every 4 hours
Maximum dose: 5 doses (10 tablets) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per softgel:
12 years and older: 2 softgels every 4 hours
Maximum dose: 6 doses (12 softgels) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 10 mL liquid:
12 years and older: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
6 to under 12 years: 10 mL every 4 hours
Maximum dose: 5 doses per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 15 mL liquid:
12 years and older: 30 mL every 4 hours
6 to under 12 years: 15 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 20 mL liquid:
12 years and older: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 30 mL liquid:
12 years and older: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Usual Pediatric Dose for Influenza
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per tablet:
12 years and older: 2 tablets every 4 hours
Maximum dose: 5 doses (10 tablets) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per softgel:
12 years and older: 2 softgels every 4 hours
Maximum dose: 6 doses (12 softgels) per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 10 mL liquid:
12 years and older: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
6 to under 12 years: 10 mL every 4 hours
Maximum dose: 5 doses per 24 hours
Acetaminophen 325 mg/ dextromethorphan 10 mg/ guaifenesin 200 mg/ phenylephrine 5 mg per 15 mL liquid:
12 years and older: 30 mL every 4 hours
6 to under 12 years: 15 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 20 mL liquid:
12 years and older: 20 mL every 4 hours
Maximum dose: 6 doses per 24 hours
Acetaminophen 650 mg/ dextromethorphan 20 mg/ guaifenesin 400 mg/ phenylephrine 10 mg per 30 mL liquid:
12 years and older: 30 mL every 4 hours
Maximum dose: 4 doses per 24 hours
Renal Dose Adjustments
Data not available
Liver Dose Adjustments
Use with caution.
Precautions
CONTRAINDICATIONS:
- Current use of any other drug containing acetaminophen.
- Current use of a monoamine oxidase inhibitor (MAOI) or use within 14 days of stopping a MAOI.
- Hypersensitivity to any of the ingredients
Safety and efficacy have not been established in patients younger than 6 years.
Dialysis
Data not available
Other Comments
Administration advice:
- Use only provided measuring cups for liquid formulations.
- Do not crush or chew tablets or softgels.
Patient advice:
- Take only as directed.
- This product contains acetaminophen; severe liver damage may occur with use of over 4000 mg in 24 hours, use with other acetaminophen-containing medications, or having 3 or more alcoholic drinks a day during use.
- Do not use with any other drug containing acetaminophen.
- Avoid drinking alcohol while on this drug.
- If cough comes back, or is accompanied or followed by fever, headache that lasts, or rash, seek medical care promptly.
- Discontinue for cough, pain, or nasal congestion that worsens or lasts over 7 days, if new symptoms arise, fever worsens or lasts over 3 days, or for redness or swelling.
More about acetaminophen / dextromethorphan / guaifenesin / phenylephrine
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- During pregnancy
- Drug class: upper respiratory combinations
Patient resources
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Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.