Dextromethorphan + Phenylephrine

Indications

Relief of Mild to Moderate Pain & Chest Congestion, Flu Symptoms & Common Cold

Adult Dose

Relief of Mild to Moderate Pain & Congestion, Flu Symptoms & Common Cold 2 strips (3.67mg/2.5mg) PO q4hr; not to exceed 12/day 15 mL [(20mg/10mg)/15mL] PO q4hr; not to exceed 90 mL/day 10 mL [(15mg/2.5mg)/5mL] PO q6hr; not to exceed 40 mL/day

Child Dose

Relief of Mild to Moderate Pain & Congestion, Flu Symptoms & Common Cold 4-6 years 1mL [(5mg/2.5mg)/1mL] PO q4hr; not to exceed 6 mL/day 1 strip (3.67mg/2.5mg) PO q4hr; not to exceed 6/day 5 mL [(5mg/2.5mg)/5mL] PO q4hr; not to exceed 30 mL/day Safetussin CD Liquid: 2.5 mL q6hr; not to exceed 10 mL/day 6-12 years 2 mL [(5mg/2.5mg)/1mL] PO q4hr; not to exceed 6 mL/day 2 strips (3.67mg/2.5mg) PO q4hr; not to exceed 12/day 10 mL [(5mg/2.5mg)/5mL] PO q4hr; not to exceed 60 mL/day 7.5 mL [(20mg/10mg)/15mL] PO q4hr; not to exceed 45 mL/day >12 years 2 strips (3.67mg/2.5mg) PO q4hr; not to exceed 12/day 15 mL [(20mg/10mg)/15mL] PO q4hr; not to exceed 90 mL/day 10 mL [(15mg/2.5mg)/5mL] PO q6hr; not to exceed 40 mL/day

Contra Indications

Contraindicated in documented hypersensitivity to the drugs or within 14 days of MAO inhibitor therapy

Precautions

Not to be administered to children without the guidance of a physician if no recommendations described in the OTC product labeling Caution in elderly patients, hyperthyroidism, myocardial disease, bradycardia, partial heart block or severe arteriosclerosis 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 Do not take dextromethorphan for persistent or chronic cough associated with smoking, asthma, or emphysema, or if it is accompanied by excessive phlegm unless directed by a healthcare provider; dextromethorphan may slow the breathing

Pregnancy-Lactation

C Pregnancy Category: C Lactation: Excretion in milk unknown; use with caution

Adverse Effects

Frequency Not Defined Hypertension Severe peripheral and visceral vasoconstriction Reflex tachycardia Dizziness Drowsiness Excitability Headache Restlessness Tremor GI disturbances

Mechanism of Action

Dextromethorphan is a cough suppressant that acts centrally on the cough center in the medulla. Phenylephrine is a vasoconstrictor and a decongestant that relieves symptoms resulting from irritation of upper respiratory tract tissue. It shrinks swollen mucous membranes, reduces nasal congestion and tissue hyperemia.

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