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Generic name: dyphylline [ dye-FI-lin ]
Brand names: Lufyllin, Lufyllin-400, Dylix, Dilor, Neothylline, Dilor-400
Drug class: Methylxanthines

What is dyphylline?

Dyphylline is a bronchodilator. It works by relaxing muscles in the lungs and chest, making the lungs less sensitive to allergens and other causes of bronchospasm.

Dyphylline is used to treat symptoms such as wheezing or shortness of breath caused by asthma, bronchitis, emphysema, and other breathing problems

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

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

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

What should I discuss with my my healthcare provider before taking dyphylline?

You should not use dyphylline if you are allergic to it.

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

  • a gastric or peptic ulcer;

  • epilepsy or other seizure disorder;

  • heart disease, high blood pressure, or history of heart attack;

  • liver or kidney disease;

  • a thyroid disorder; or

  • if you take a beta-blocker medicine (atenolol, carvedilol, metoprolol, nebivolol, propranolol, sotalol, and others).

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

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

Do not give this medicine to anyone under 18 years old without medical advice.

How should I take dyphylline?

Follow the directions on your prescription label. Do not take dyphylline in larger or smaller amounts or for longer than recommended. Your doctor may occasionally change your dose to make sure you get the best results.

Take your doses at the same time every day to keep a constant level of dyphylline in your blood.

Do not use dyphylline to treat an asthma or bronchospasm attack. Use only a fast acting inhalation medication.

Your dosage needs may change if you are ill, or if your doctor changes your brand, strength, or type of dyphylline. You will need regular medical Do not change your doses or medication schedule without your doctor's advice.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

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

Overdose symptoms may include agitation, severe vomiting, feeling very thirsty or hot, heavy sweating, ringing in your ears, irregular heartbeats, or seizure (convulsions).

What should I avoid while taking dyphylline?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Dyphylline side effects

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;

  • a light-headed feeling, like you might pass out;

  • coughing up blood;

  • muscle twitching, seizure (convulsions);

  • confusion, tremors or shaking;

  • high blood sugar--increased thirst, increased urination, hunger, dry mouth, fruity breath odor, drowsiness, dry skin, blurred vision, weight loss; or

  • worsening or no improvement in your breathing symptoms.

Common side effects may include:

  • nausea, vomiting, stomach pain, diarrhea;

  • headache;

  • sweating, or flushing (warmth, redness, or tingly feeling);

  • sleep problems (insomnia); or

  • feeling restless, nervous, 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.

What other drugs will affect dyphylline?

Other drugs may interact with dyphylline, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.

More about dyphylline

Patient resources

Other brands

Lufyllin, Dilor, Dilor-400, Dylix, Lufyllin-400

Related treatment guides

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.