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(Generic versions may still be available.)
(promethazine HCl and phenylephrine HCl) Syrup
Each 5 mL (one teaspoonful), for oral administration contains: Promethazine hydrochloride 6.25 mg; phenylephrine hydrochloride 5 mg, Alcohol 7%.
Inactive Ingredients: Citric acid, FD& C yellow #6, flavor, methyl- paraben, propylene glycol, propyl- paraben, purified water, saccharin sodium, sodium benzoate, sodium citrate, sucrose. Promethazine hydrochloride, a phenothiazine derivative, is chemically designated as (±)-10-[2-(Dimethylamino) propyl] phenothiazine monohydrochloride.
Promethazine hydrochloride occurs as a white to faint yellow, practically odorless, crystalline powder which slowly oxidizes and turns blue on prolonged exposure to air. It is soluble in water and freely soluble in alcohol. It has a molecular weight of 320.89, and a molecular formula of C17H20N2S•HCl.
Phenylephrine hydrochloride is a sympathomimetic amine salt which is chemically designated as (-)- m- Hydroxy-a-[(methylamino) methyl] benzyl alcohol hydrochloride. It occurs as white or nearly white crystals, having a bitter taste. It is freely soluble in water and alcohol. Phenylephrine hydrochloride is subject to oxidation and must be protected from light and air. It has a molecular weight of 203.67, and a molecular formula of C9H13NO2•HCl.
What are the possible side effects of phenylephrine and promethazine (Phenergan VC, Promethazine VC Plain)?
If you experience any of the following serious side effects, stop taking phenylephrine and promethazine and seek emergency medical attention or contact your doctor immediately:
- an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives); or
- uncontrollable movements of the eyes, lips, tongue, face, arms, or legs.
Other, less serious side effects may be more likely to occur. Continue to take phenylephrine and promethazine and talk to your doctor if you...
Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.
Additional Phenergan Vc Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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