Interactions with herbs
Evening Primrose
Kava Kava
Milk Thistle
Look Up > Drugs > Promethazine and Dextromethorphan
Promethazine and Dextromethorphan
Pronunciation
U.S. Brand Names
Generic Available
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Warnings/Precautions
Usual Dosage
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Dosage Forms

Pronunciation
(proe METH a zeen & deks troe meth OR fan)

U.S. Brand Names
Phenameth® DM; Phenergan® With Dextromethorphan; Pherazine® w/DM

Generic Available

Yes


Synonyms
Dextromethorphan and Promethazine

Pharmacological Index

Antihistamine/Antitussive


Use

Temporary relief of coughs and upper respiratory symptoms associated with allergy or the common cold


Pregnancy Risk Factor

C


Warnings/Precautions

Research on chicken embryos exposed to concentrations of dextromethorphan relative to those typically taken by humans has shown to cause birth defects and fetal death; more study is needed, but it is suggested that pregnant women should be advised not to use dextromethorphan-containing medications


Usual Dosage

Oral:

2-6 years: 1.25-2.5 mL every 4-6 hours up to 10 mL in 24 hours

6-12 years: 2.5-5 mL every 4-6 hours up to 20 mL in 24 hours

Adults: 5 mL every 4-6 hours up to 30 mL in 24 hours


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

Although promethazine is a phenothiazine derivative, extrapyramidal reactions or tardive dyskinesias are not seen with the use of this drug.


Patient Information

See individual agents. Pregnancy/breast-feeding precautions: Inform prescriber if you are or intend to get pregnant. Breast-feeding is not recommended.


Dosage Forms

Syrup: Promethazine hydrochloride 6.25 mg and dextromethorphan hydrobromide 15 mg per 5 mL with alcohol 7% (120 mL, 480 mL, 4000 mL)


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