Promethazine hydrochloride and phenylephrine hydrochloride syrup is indicated for the temporary relief of upper respiratory symptoms, including nasal congestion, associated with allergy or the common cold.
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 320.88, a molecular formula of C17H20N2S•HCl, and the following structural formula:
Phenylephrine hydrochloride is a sympathomimetic amine salt which is chemically designated as (-)-m-Hydroxy-α-[(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, a molecular formula of C9H13NO2•HCl, and the following structural formula:
Promethazine hydrochloride and phenylephrine hydrochloride syrup is contraindicated for children under 2 years of age (see WARNINGS – Black Box Warning and Use in Pediatric Patients).
The recommended doses are given in the following table:
Adults And Children 12 Years And Over
1 teaspoonful (5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.
Children 6 To Under 12 Years Of Age
½ to 1 teaspoonful (2.5 to 5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.
Children 2 To Under 6 Years Of Age
¼ to ½ teaspoonful (1.25 to 2.5 mL) every 4 to 6 hours.
Promethazine Hydrochloride And Phenylephrine Hydrochloride Syrup | Bryant Ranch Prepack
Promethazine hydrochloride and phenylephrine hydrochloride syrup is contraindicated for children under 2 years of age (see WARNINGS – Black Box Warning and Use in Pediatric Patients).
The recommended doses are given in the following table:
Adults And Children 12 Years And Over
1 teaspoonful (5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.
Children 6 To Under 12 Years Of Age
½ to 1 teaspoonful (2.5 to 5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.
Children 2 To Under 6 Years Of Age
¼ to ½ teaspoonful (1.25 to 2.5 mL) every 4 to 6 hours.