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Omega-3 Fish Oil Supplements and Prescriptions

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Side Effects of Prescription Omega-3s

Common side effects of prescription omega-3s vary according to the type of prescription. 

Side effects of Epanova include:

  • Diarrhea
  • Nausea
  • Stomach pain

Side effects of Lovaza include:

  • Burping
  • Unpleasant taste in mouth
  • Upset stomach

A common side effect of Vascepa is joint pain.

Prescription omega-3 fatty acids or high doses of omega-3 supplements may also affect the blood's ability to clot. People who take blood-thinning medications should be aware of this precaution if they also take omega-3s. Talk to your doctor if you take blood thinning medicines, such as Coumadin (warfarin) or nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin and ibuprofen.

Omega-3 fatty acids lower high triglyceride levels, but brands that contain DHA may raise levels of LDL "bad" cholesterol. This could be a problem if you also have high cholesterol, which often goes hand-in-hand with high triglycerides.

WebMD Medical Reference

Reviewed by Michael W. Smith, MD on March 11, 2013
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