• Basic Info
• Top Questions

What is this medicine?

CHLORPHENIRAMINE; DEXTROMETHORPHAN (klor fen IR a meen; dex troe meth OR fan) is a combination of an antihistamine and a cough suppressant. It is used to treat the symptoms of a cold. This medicine will not treat an infection.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

• asthma
• heart disease
• glaucoma
• kidney disease
• liver disease
• long lasting (chronic) cough
• other health condition
• prostate problems
• taken an MAOI like Carbex, Eldepryl, Marplan, Nardil, or Parnate in last 14 days
• an unusual or allergic reaction to chlorpheniramine, dextromethorphan, other medicines, foods, dyes, or preservatives
• pregnant or trying to get pregnant
• breast-feeding

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the package label. Take your medicine at regular intervals. Do not take it 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 12 years old for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

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.

What may interact with this medicine?

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:

• alcohol
• barbiturates, like phenobarbital
• furazolidone
• linezolid
• medicines for sleep
• other medicines for cold, cough or allergy
• procarbazine
• some herbal or nutritional supplements like St. John's Wort

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medicine?

Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse. See the doctor if the symptoms last more than 7 days or if a fever, rash, or long lasting headache is also present. Coughs that last more than 7 days or come back can be a sign of a serious health condition.

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.