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Look Up > Drugs > Promethazine and Phenylephrine
Promethazine and Phenylephrine
Pronunciation
U.S. Brand Names
Generic Available
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Usual Dosage
Dietary Considerations
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Nursing Implications
Dosage Forms

Pronunciation
(proe METH a zeen & fen il EF rin)

U.S. Brand Names
Phenergan® VC Syrup; Promethazine VC Plain Syrup; Promethazine VC Syrup; Prometh VC Plain Liquid

Generic Available

Yes


Synonyms
Phenylephrine and Promethazine

Pharmacological Index

Antihistamine/Decongestant Combination


Use

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


Pregnancy Risk Factor

C


Usual Dosage

Oral:

2-6 years: 1.25 mL every 4-6 hours, not to exceed 7.5 mL in 24 hours

6-12 years: 2.5 mL every 4-6 hours, not to exceed 15 mL in 24 hours

Children >12 years and Adults: 5 mL every 4-6 hours, not to exceed 30 mL in 24 hours


Dietary Considerations

Increase dietary intake of riboflavin


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

Phenylephrine: Use with caution since phenylephrine is a sympathomimetic amine which could interact with epinephrine to cause a pressor response

Promethazine: No information available to require special precautions


Dental Health: Effects on Dental Treatment

Phenylephrine: Up to 10% of patients could experience tachycardia, palpitations, and dry mouth; use vasoconstrictor with caution

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.


Nursing Implications

May cause drowsiness


Dosage Forms

Liquid: Promethazine hydrochloride 6.25 mg and phenylephrine hydrochloride 5 mg per 5 mL (120 mL, 240 mL, 473 mL)


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