Promethazine DM (generic Phenergan DM)

Uses

This combination medication is used to temporarily treat runny nose, coughing, and sneezing caused by the common cold, allergies, hay fever, and other breathing illnesses. Promethazine is a phenothiazine that works like an antihistamine. It blocks the effects of a certain natural substance (histamine), which causes allergy symptoms. It also has a drying effect. Dextromethorphan belongs to a class of drugs known as cough suppressants. It acts on a part of the brain (cough center) to reduce the need to cough.

This product is usually not used for ongoing cough from smoking or long-term breathing problems (such as chronic bronchitis, emphysema) unless directed by your doctor.

Cough-and-cold products have not been shown to be safe or effective in children younger than 6 years. Therefore, do not use this product to treat cold symptoms in children younger than 6 years unless specifically directed by the doctor. Some products (such as long-acting tablets/capsules) are not recommended for use in children younger than 12 years. Ask your doctor or pharmacist for more details about using your product safely.

These products do not cure or shorten the length of the common cold and may cause serious side effects. To decrease the risk for serious side effects, carefully follow all dosage directions. Do not use this product to make a child sleepy. Do not give other cough-and-cold medication that might contain the same or similar ingredients (see also Drug Interactions section). Ask the doctor or pharmacist about other ways to relieve cough and cold symptoms (such as drinking enough fluids, using a humidifier or saline nose drops/spray).

How to use Phenergan DM

Take this medication by mouth as directed by your doctor, with or without food, usually every 4-6 hours as needed. Since dosing recommendations may vary, carefully follow your doctor’s directions for taking this medication.

The dosage is based on your age, medical condition, and response to treatment. Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

Drink plenty of fluids while you are using this medication unless otherwise directed by your doctor. The fluid will help loosen the mucus in your lungs.

Improper use of this medication (abuse) may result in serious harm (such as brain damage, seizure, death). Do not increase your dose, take it more frequently, or use it for a longer time than directed.

Tell your doctor if your cough persists, returns, or worsens after 7 days or if it is accompanied by fever, severe sore throat, rash, or persistent headache.

Information on this medication quoted from WebMD.com