Theo-Dur

When taking theophylline, you should avoid large amounts of caffeine-containing beverages, such as tea or coffee.

• If you miss a dose...
  Take the next dose at the regular time. Do not try to make up the dose you missed.

• Storage instructions...
  Store at room temperature. Keep the container tightly closed. Protect from excessive heat, light, and moisture. Make sure this medicine is kept out of reach of children.

What side effects may occur?

Side effects from theophylline cannot be anticipated. Nausea and restlessness may occur when you first start to take theophylline, but will probably disappear as your body becomes used to the drug. If side effects persist, see your doctor; the dosage may be too high.

• Other side effects may include:
  Convulsions, diarrhea, disturbances of heart rhythm, excitability, frequent urination, hair loss, headache, heart palpitations, insomnia, irritability, muscle twitching, rash, severe seizures, tremors, vomiting

Why should Theophylline not be prescribed?

Do not take theophylline if you have ever had an allergic reaction to it or similar drugs.

Do not take theophylline ur if you have an active peptic ulcer or a seizure disorder such as epilepsy.

Special warnings about Theophylline

If you are a smoker, your body will tend to process and get rid of theophylline rather quickly; thus, you may need to take more frequent doses than a nonsmoker. Tell your doctor if you start or stop smoking. Even if you quit, the quick-clearance effect may linger for 6 months to 2 years.

You should take theophylline cautiously and under close medical supervision if you are over age 60.

You should also take theophylline cautiously and under close supervision if you have had a sustained high fever, or if you have heart disease, liver disease, heartbeat irregularities, fluid in the lungs, an underactive thyroid gland, the flu or another viral illness, or the symptoms of shock.

Call your doctor immediately if you develop nausea, vomiting, a lasting headache, insomnia, restlessness, or a too-rapid heartbeat; if you develop a new illness, especially with a fever; or if an illness you already have gets worse.