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.