acetaminophen/dextromethorphan/phenylephrine/guaifenesin (OTC)

Brand and Other Names:Tylenol Cold Multi-Symptom Severe, Tylenol Cold Head Congestion Severe, more...Delsym Cough + Cold Daytime, Sudafed PE Cold & Cough, Mucinex Fast-Max Cold, Flu & Sore Throat, Children's Mucinex Multi-Symptom Cold & Fever, Children's Mucinex Cold, Cough & Sore Throat, Tylenol Cold & Flu Severe
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Dosing & Uses

AdultPediatric

Dosage Forms & Strengths

acetaminophen/dextromethorphan/phenylephrine/guaifenesin

liquid

  • (650mg/20mg/10mg/400mg)/20mL
  • (325mg/10mg/5mg/200mg)/15mL

tablet

  • 325mg/10mg/5mg/200mg
  • 325mg/15mg/5mg/200mg
  • 325mg/10mg/5mg/100mg
more...

Relief of Cold Symptoms

20 mL [(650mg/20mg/10mg/400mg)/20mL] PO q4hr; not to exceed 120 mL/day

30 mL [(325mg/10mg/5mg/200mg)/15mL] PO q4hr; not to exceed 180 mL/day

2 tablets (325mg/10mg/5mg/200mg) PO q4hr; not to exceed 12 tablets/day

2 tablets (325mg/15mg/5mg/200mg) PO q6-8hr; not to exceed 8 tablets/day

2 tablets (325mg/10mg/5mg/100mg) PO q4hr; not to exceed 12 tablets/day

Dosage Forms & Strengths

acetaminophen/dextromethorphan/phenylephrine/guaifenesin

liquid

  • (325mg/10mg/5mg/200mg)/10mL (Children’s Mucinex Multi-Symptom Cold & Fever; Children's Mucinex Cold, Cough & Sore Throat)
  • (650mg/20mg/10mg/400mg)/20mL

tablet

  • 325mg/10mg/5mg/100mg (Sudafed PE Cold & Cough)
  • 325mg/10mg/5mg/200mg
more...

Relief of Cold Symptoms

< 12 years

  • Not recommended

>12 years

  • 20 mL [(650mg/20mg/10mg/400mg)/20mL] PO q4hr; not to exceed 120 mL/day
  • 30 mL [(325mg/10mg/5mg/200mg)/15mL] PO q4hr; not to exceed 180 mL/day
  • 2 tablets (325mg/10mg/5mg/200mg) PO q4hr; not to exceed 12 tablets/day
  • 2 tablets (325mg/15mg/5mg/200mg) PO q6-8hr; not to exceed 8 tablets/day
  • 2 tablets (325mg/10mg/5mg/100mg) PO q4hr; not to exceed 12 tablets/day
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Interactions

Interaction Checker

and acetaminophen/dextromethorphan/phenylephrine/guaifenesin

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            Adverse Effects

            Frequency Not Defined

            Hypertension

            Reflex tachycardia

            Severe peripheral and visceral vasoconstriction

            Dizziness

            Drowsiness

            Excitability

            Headache

            Restlessness

            Tremor

            Dermatologic rash

            Nausea

            Vomiting

            Anemia blood dyscrasias (neutropenia, pancytopenia, leukopenia)

            Bilirubin and alkaline phosphatase may increase

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            Warnings

            Contraindications

            Documented hypersensitivity to any of the drugs or components

            Cautions

            Caution in elderly patients, hyperthyroidism, myocardial disease, bradycardia, partial heart block or severe atherosclerosis when administering phenylephrine; in hypovolemia, phenylephrine use is not a substitute for replacement of blood, fluids and electrolytes, and plasma (promptly restore with loss); dilute IV and administer via large vein; extravasation precautions required

            Not for persistent cough associated with chronic bronchitis, smoking, asthma, or accompanied with excessive secretions  

            Acetaminophen hepatotoxicity possible in chronic alcoholics following various dose levels; severe or recurrent pain or high or continued fever may indicate a serious illness; contained in many OTC products and combined use with these products may result in toxicity due to cumulative doses exceeding recommended maximum dose

            Acetaminophen: Risk for rare, but serious skin reactions that can be fatal; these reactions include Stevens-Johnson Syndrome (SJS), toxic epidermal necrolysis (TEN), and acute generalized exanthematous pustulosis (AGEP); symptoms may include skin redness, blisters and rash

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            Pregnancy & Lactation

            Pregnant or breastfeeding patients should seek advice of health professional before using OTC drugs

            Pregnancy Categories

            A:Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.

            B:May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.

            C:Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.

            D:Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.

            X:Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.

            NA:Information not available.

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            Pharmacology

            Mechanism of Action

            Dextromethorphan: Cough suppressant that acts centrally on the cough center in the medulla

            Guaifenesin: Increases respiratory tract fluid secretions and helps to loosen phlegm and bronchial secretions

            Phenylephrine: Vasoconstrictor and a decongestant that relieves symptoms resulting from irritation of upper respiratory tract tissue; shrinks swollen mucous membranes, reduces nasal congestion and tissue hyperemia

            Acetaminophen: Blocks pain impulse generation peripherally and may inhibit the generation of prostaglandin in the CNS; reduces fever by inhibiting the hypothalamic heat-regulating center

            Pharmacokinetics

            Acetaminophen

            • Peak plasma time: 10-60 min (PO immediate release); 60-120 min (PO extended release); 6 hr (PO 500 mg tablet); 8 hr (PO 650 mg extended release tablet)
            • Vd: 1 L/kg
            • Protein binding: 10-25%
            • Metabolism: Liver (microsomal enzyme systems); conjugation (glucuronic acid)
            • Half-life: 1.25-3hr
            • Excretion: Urine

            Dextromethorphan

            • Onset: 15-30 min
            • Duration: 3-6 hr
            • Metabolism: Hepatic P450 enzyme CYP2D6
            • Excretion: Urine
            • Half-life: 2-4 hr (extensive metabolizers); 24 hr (poor metabolizers)
            • Peak plasma time: 2-3 hr

            Phenylephrine

            • Half-life: 2-3 hr
            • Onset: 10-15 min
            • Duration: 15 min
            • Bioavailability: < 38%
            • Excretion: Urine (80-90%)
            • Peak plasma time: 0.75-2 hr
            • Vd: 26-61 L
            • Vdss: 340 L

            Guaifenesin

            • Half-Life: 1 hr
            • Onset: 30 min
            • Duration: 4-6 hr
            • Metabolism: Liver
            • Metabolite: b-(2-methoxyphenoxy) lactic acid
            • Excretion: Urine
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