Dyphylline is a bronchodilator. It works by relaxing muscles in the airways to improve breathing.

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

Dyphylline and guaifenesin is a combination medicine used to treat cough and breathing problems caused by conditions such as bronchial asthma, chronic bronchitis, or emphysema.

This medication is not a rescue medication for asthma or bronchitis, and is not a cure for emphysema.

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

You should not use this medicine if you are allergic to dyphylline or guaifenesin. This medication will not treat an asthma attack.

To make sure dyphylline and guaifenesin is safe for you, tell your doctor if you have:

• heart disease or a history of heart attack;
• high blood pressure;
• liver or kidney disease;
• overactive thyroid;
• a stomach ulcer; or
• if you use a beta-blocker medicine (atenolol, bisoprolol, carvedilol, metoprolol, propranolol, sotalol, and many others).

FDA pregnancy category C. It is not known whether dyphylline and guaifenesin will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

Dyphylline and guaifenesin can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Dyphylline and guaifenesin should not be given to a child younger than 6 years old.

Use Panfil G (Oral) 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.

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

Call your doctor at once if you have:

• pounding heartbeats or fluttering in your chest;
• rapid breathing, feeling short of breath;
• seizure (convulsions); or
• coughing up blood or vomit that looks like coffee grounds.

Common side effects may include:

• nausea, vomiting, stomach pain, diarrhea;
• headache;
• feeling restless or irritable;
• sleep problems (insomnia); or
• flushing (warmth, redness, or tingly feeling).

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 any cough or cold medicine. Guaifenesin is contained in many combination medicines. Taking certain products together can cause you to get too much guaifenesin.