Brand Names: Dilor, Dylix, Lufyllin, Neothylline

Generic Name: dyphylline (Pronunciation: dye FI lin)

• What is dyphylline (Lufyllin)?
• What are the possible side effects of dyphylline (Lufyllin)?
• What is the most important information I should know about dyphylline (Lufyllin)?
• Who should not take dyphylline (Lufyllin)?
• How should I take dyphylline (Lufyllin)?
• What happens if I miss a dose (Lufyllin)?
• What happens if I overdose (Lufyllin)?
• What should I avoid while taking dyphylline (Lufyllin)?
• What other drugs will affect dyphylline (Lufyllin)?
• Where can I get more information?

What is dyphylline (Lufyllin)?

Dyphylline is a bronchodilator. Dyphylline works in several ways: It relaxes muscles in your lungs and chest to allow more air in, it decreases the sensitivity of your lungs to allergens and other substances that cause inflammation, and it increases the contractions of your diaphragm to draw more air into the lungs.

Dyphylline is used to treat the symptoms of asthma, bronchitis, and emphysema.

Dyphylline may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of dyphylline (Lufyllin)?

If you experience any of the following serious side effects, stop taking dyphylline and seek emergency medical attention:

• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);
• seizures;
• increased or irregular heartbeats; or
• severe nausea or vomiting.

Other, less serious side effects may occur although they are not common at appropriate doses. Continue to take dyphylline and talk to your doctor if you experience

• slight nausea, decreased appetite, or weight loss;
• restlessness, tremor, or insomnia; or
• headache, lightheadedness, or dizziness.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.

Read the Lufyllin (dyphylline) Side Effects Center for a complete guide to possible side effects »

What is the most important information I should know about dyphylline (Lufyllin)?

Call your doctor right away if you experience nausea, vomiting, insomnia, restlessness, seizures, an increased heart rate, or a headache. These could be signs of too much dyphylline in your blood.

Do not start or stop smoking without your doctor's knowledge. Smoking may affect your dosage.

Do not take more of this medicine than is prescribed without consulting your doctor. Seek medical attention if you are having increasing difficulty breathing.