As well as its needed effects, omega-3 polyunsaturated fatty acids (the active ingredient contained in Omega-3) may cause unwanted side effects that require medical attention.
If any of the following side effects occur while taking omega-3 polyunsaturated fatty acids, check with your doctor immediately:
Incidence not known •Bleeding gums
•cough
•coughing up blood
•difficulty with breathing or swallowing
•dizziness
•fast or irregular heartbeat
•headache
•hives, itching, or skin rash
•increased menstrual flow or vaginal bleeding
•nosebleeds
•paralysis
•prolonged bleeding from
cuts
•puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
•red or black, tarry stools
•red or dark brown urine
•sweating
•tightness in the chest
•unusual tiredness or weakness
Some omega-3 polyunsaturated fatty acids side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:
Less common •Acid or sour stomach
•bad, unusual, or unpleasant (after) taste
•belching
•bloated or full feeling
•change in taste
•excess air or gas in the stomach
•heartburn
•indigestion
•stomach discomfort, upset, or pain
Incidence not known •Diarrhea
•difficulty having a bowel movement (stool)
•loss of appetite
•nausea or vomiting
•passing of gas
•stomach fullness