Never use theophylline in larger amounts, or for longer than prescribed. Seek medical attention if your breathing problems get worse quickly, or if you think your medications are not working as well.
Overdose can occur if you take too much theophylline at one time, or if your daily doses are too high.
Tell your doctor about all your current medicines and any you start or stop using. Many drugs can interact with theophylline.
Before taking this medicine
You should not use theophylline if you are allergic to it.
Tell your doctor if you have ever had:
a gastric or peptic ulcer;
a serious infection called sepsis;
liver disease (especially cirrhosis or hepatitis);
fluid in your lungs;
heart problems;
a thyroid disorder;
seizures; or
kidney disease.
Tell your doctor if you drink alcohol, or if you smoke or have recently quit smoking cigarettes or marijuana.
Also tell your doctor if you have been sick with a high fever (102 degrees or higher) for 24 hours or longer.
Tell your doctor if you are pregnant or breastfeeding.
Do not give  theophylline to a child without medical advice.
