Before using theophylline, tell your doctor or pharmacist if you are allergic to it; or to aminophylline or oxtriphylline; or to theobromine or caffeine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: a certain breathing disorder (cystic fibrosis), glaucoma, diabetes, heart problems (e.g., congestive heart failure, irregular heartbeat), high blood pressure, kidney disease, liver disease (e.g., cirrhosis), seizures, stomach/intestinal ulcer, thyroid disease.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
If you develop a fever/flu-like symptoms while taking this medication, tell your doctor promptly. The dose of your medicine may need to be adjusted.
Before having surgery, tell your doctor or dentist that you are using this medication.
Older adults may be more sensitive to the side effects of this drug, especially fast/irregular heartbeat, or trouble sleeping. Careful monitoring of side effects and drug blood levels is recommended.
Caution is advised when using this drug in children because they may be more sensitive to its effects. Careful monitoring of side effects, drug blood levels, and dose adjustment is recommended.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. Changes in your body during the last 3 months of pregnancy may affect the amount of this drug in your blood. Your doctor should carefully monitor the amount of drug in your blood, as well as any side effects, so that your dose may be changed if needed.
This drug passes into breast milk and may have undesirable effects on a nursing infant (e.g., irritability). Consult your doctor before breast-feeding.