What side effects may I notice from receiving Isosorbide Mononitrate?

Side effects that you should report to your doctor or health care professional as soon as possible:
-bluish discoloration of lips, fingernails, or palms of hands
-irregular heartbeat, palpitations
-low blood pressure
-nausea, vomiting
-persistent headache
-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):
-flushing of the face or neck
-rash

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