What side effects may I notice from receiving Theophylline, Anhydrous?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-fast or irregular breathing or heartbeat
-seizures
-trouble sleeping
-vomiting
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-diarrhea
-headache
-increased urination
-irritable
-nausea
-restless
-tremors

This list may not describe all possible side effects for Theophylline, Anhydrous. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.