The dose of theophylline is carefully determined by your doctor based on your age and response to the medication. Sometimes blood tests are required in order to make sure the levels of theophylline are within the range that will be effective, yet not high enough to cause unwanted side effects.
Theophylline is best taken with a full glass (8 ounces) of water on an empty stomach (either one hour before or 2 hours after meals) unless otherwise directed by your doctor. If the medication causes stomach upset, your doctor may want you to take it with food.
Theophylline must be taken regularly as prescribed so that blood levels of the medication are always in the correct range for effectiveness. It is important that you don't take more theophylline than prescribed, even if your breathing does not get better, because levels at which signs of overdose take place are not as high as most medications. If your breathing does not improve, or gets worse, call your doctor at once.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are
using the medication without consulting your doctor.
It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.
Store this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.