SIDE EFFECTS: Stomach pain/cramping, nausea, vomiting, diarrhea, loss of appetite, headache, trouble sleeping, irritability, restlessness, nervousness, shaking, flushing, and increased urination may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if any of these unlikely but serious side effects occur: confusion, dizziness, mental/mood changes, muscle twitching/pain/tenderness/weakness, rapid breathing.Tell your doctor immediately if any of these rare but very serious side effects occur: fainting, fast/slow/irregular heartbeat, vomit that looks like coffee grounds, seizures.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, red/scaly skin, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using aminophylline, tell your doctor or pharmacist if you are allergic to it; or to theophylline, theobromine, caffeine, or ethylenediamine; or if you have any other allergies.Before using this medication, tell your doctor or pharmacist your medical history, especially of: a certain breathing disorder (cystic fibrosis), a certain eye problem (glaucoma), diabetes, heart problems (e.g., congestive heart failure, irregular heartbeat), high blood pressure, current fever/flu-like symptoms, 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.Before having surgery, tell your doctor or dentist that you are taking this medication.Caution is advised when using this drug in the elderly because they may be more sensitive to its effects. Careful monitoring of side effects and drug blood levels is recommended.Caution is advised when using this drug in children, especially newborns and children younger than 1 year, 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.

Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.