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Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.

Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth.

Dextromethorphan and guaifenesin is a combination medicine used to treat cough and chest congestion caused by the common cold, infections, or allergies.

Dextromethorphan will not treat a cough that is caused by smoking, asthma, or emphysema.

There are many brands and forms of this medication available and not all brands are listed on this leaflet.

Dextromethorphan and guaifenesin may also be used for purposes not listed in this medication guide.

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Cough or cold medicine is usually taken only for a short time until your symptoms clear up.

Do not give this medication to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children.

Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.

Do not crush, chew, break, or open an extended-release capsule or tablet. Swallow it whole.

Dextromethorphan and guaifenesin granules should be sprinkled directly onto the tongue and swallowed right away.

Drink extra fluids to help loosen the congestion and lubricate your throat while you are taking this medication.

Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash.

If you need to have any type of surgery, tell the surgeon ahead of time if you have taken this medicine within the past few days.

Store at room temperature away from moisture and heat.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

This medication may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.

Drinking alcohol can increase certain side effects of this medicine.

Ask a doctor or pharmacist before using any cough, cold, or allergy medicine. Many medicines available over the counter contain dextromethorphan or guaifenesin. Taking certain products together can cause you to get too much of this type of medication. Check the label to see if a medicine contains an antitussive or expectorant.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

• mood changes;

• severe headache; or

• severe dizziness or anxiety, feeling like you might pass out;.

Common side effects may include:

• dizziness, drowsiness;

• sleep problems (insomnia);

• diarrhea; or

• feeling nervous, restless, anxious, or irritable;.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Ask a doctor or pharmacist before using this medicine if you are also using any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.

Taking this medicine with other drugs that make you sleepy or slow your breathing can worsen these effects. Ask your doctor before taking dextromethorphan and guaifenesin with a sleeping pill, narcotic pain medicine, muscle relaxer, or medicine for anxiety, depression, or seizures.