What side effects may I notice from receiving Quinidine?

Side effects that you should report to your doctor or health care professional as soon as possible:
-breathing problems
-changes in vision
-confusion
-feeling faint or lightheaded
-fever
-headache
-irregular heartbeat
-nausea, vomiting
-pain on swallowing
-skin rash, peeling or loose skin
-ringing in the ears
-unusual bruising or bleeding
-unusually weak or tired

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-diarrhea
-flushing of the skin with intense itching
-heartburn
-loss of appetite
-stomach pain

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