You probably know omega-3-acid ethyl esters by the more common term fish oil. While oil taken from fish does contain the fatty acids of omega-3, the substance also comes from a variety of nuts. Most people take omega-3 supplements to help lower their cholesterol levels, specifically the fatty acids known as triglycerides. "Surgical Neurology" reported in 2006 that fish oil also may benefit you if you have regular back pain, such as that associated with arthritis. Your doctor may recommend omega-2 supplements if you have high levels of triglycerides in your blood. If you decide to take fish oil capsules on your own, ask your physician about it first.
Back Discomfort
Omega-3-acid ethyl esters may induce back pain when you first take it. While doctors remain uncertain why this happens, it may occur, but usually in a mild form. As you adjust to the supplement, this back pain should end. Surgical Neurology magazine states that in a clinical study, omega-3 supplements did help reduce the the symptoms of chronic back pain. If, however, you get the non-serious temporary side effect of back pain and it does not end, seek the advice of your physician.
Flu-Like Symptoms
Flu-like symptoms may happen as body aches, fever and headaches. These symptoms are part of the flu-like side effect caused by taking this supplement. It is unknown exactly why this side effect occurs with omega-3-acid ethyl esters, but it should occur only temporarily. You may even think you have a cold or the flu, but the symptoms may subside more quickly. If they continue as you use omega-3, speak with a medical professional about them.
Taste Changes
Because omega-3-acid ethyl esters as a supplement usually derive from fish oil, you may experience a fishy taste when you first use it. You also may burp more than usual, again producing a taste of fish. The supplement also may cause your taste sensation to become altered. All of these side effects generally occur only at the start of omega-3 supplement use and should stop without medical intervention. If they do persist, your doctor may have some advice to get rid of them.
Upset Stomach
An upset stomach may occur as a result of taking omega-3 supplements, Drugs.com indicates. The supplement may initially irritate your stomach. It may make you feel queasy and you may vomit. Talk to your doctor if his side effect becomes bothersome and does not cease.
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