Get emergency medical help if you have any of these signs of an allergic reaction to Fish Oil: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using Fish Oil and call your doctor at once if you have any of these serious side effects:
fever, chills, body aches, flu symptoms;
chest pain; or
uneven heartbeats.
Less serious Fish Oil side effects may include:
back pain;
unusual or unpleasant taste in your mouth;
upset stomach, belching; or
mild skin rash.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Fish Oil side effects (more detail)
