PHENYLEPHRINE; PROMETHAZINE (fen il EF rin; proe METH a zeen) is a decongestant and a antihistamine. It is used to treat the symptoms of allergy and colds. This medicine will not treat an infection.
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Use a specially marked spoon or container to measure your medicine. Household spoons are not accurate. Take your doses at regular intervals. Do not take your medicine more often than directed.
Talk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for children as young as 2 years of age for selected conditions, precautions do apply. Do not use in children under 2 years old.
Patients over 65 years old may have a stronger reaction and need a smaller dose.
Side effects that you should report to your doctor or health care professional as soon as possible:
fast, irregular heartbeat
high or low blood pressure
sensitive to sunlight
trouble passing urine
yellowing of the eyes or skin
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
skin rash, itching
Do not take this medicine with any of the following medications:
MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate
This medicine may also interact with the following medications:
barbiturate medicines like phenobarbital
medicines for asthma
medicines for cold or allergies
medicines for depression, anxiety or psychotic disturbances
medicines for Parkinson's disease
medicines for sleep
medicines for the stomach like metoclopramide, dicyclomine, glycopyrrolate
radio contrast dyes
St. John's wort
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Keep out of the reach of children.
Store at room temperature between 15 and 25 degrees C (59 and 77 degrees F). Protect from light. Throw away any unused medicine after the expiration date.
They need to know if you have any of the following conditions:
ulcer or other stomach problem
an unusual or allergic reaction to phenylephrine, promethazine, phenothiazines, sulfites, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
Tell your doctor if your symptoms do not improve or if they get worse.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
This medicine may cause dry eyes and blurred vision. If you wear contact lenses you may feel some discomfort. Lubricating drops may help. See your eye doctor if the problem does not go away or is severe.
Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.