Omega-3 Fish Oil

Generic name: omega-3 polyunsaturated fatty acids [ oh-MAY-ga-3 POL-ee-un-SAT-yoo-ray-ted-FAT-ee-AS-ids ]
Other brand names of omega-3 polyunsaturated fatty acids include: Eye Omega Benefits for Kids, Fish Oil, Lovaza, MegaKrill, Nature's Bounty Red Krill Oil, ... show all 9 brands Omega-3 Fish Oil, Prenatal DHA, Vascazen, Vitafusion Omega-3 Gummies
Drug class: Nutraceutical products

Medically reviewed by Drugs.com on Aug 12, 2025. Written by Cerner Multum.

What is Omega-3 Fish Oil?

Certain prescription Omega-3 Fish Oil are used in adults, together with diet, to help lower very high triglyceride levels in the blood.

Omega-3 Fish Oil may also be used alone or in combination with other vitamins in adults and children as a dietary supplement.

Omega-3 Fish Oil may also be used for purposes not listed in this medication guide.

Omega-3 Fish Oil side effects

Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of your face, lips, tongue, or throat.

Omega-3 Fish Oil may cause serious side effects. Call your doctor at once if you have:

• chest pressure, racing or pounding heartbeats, fluttering in your chest, feeling short of breath.

Common side effects of Omega-3 Fish Oil may include:

• burping;

• changes in your sense of taste; or

• upset stomach.

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.

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Warnings

Use only as directed and follow all directions on the label and package. Tell each of your healthcare providers if you use other medicines or have other medical conditions or allergies.

Before taking this medicine

You should not use Omega-3 Fish Oil if you are allergic to Omega-3 Fish Oil, soy, fish or shellfish.

Ask your doctor or pharmacist before taking Omega-3 Fish Oil if you have any health problems or use other medications.

Tell your doctor if you have or have ever had:

• diabetes;

• anemia (low red blood cells);

• if you use a blood thinner;

• a heart rhythm disorder;

• a pancreas disorder;

• scheduled medical procedure or surgery;

• underactive thyroid; or

• liver disease.

It is not known if Omega-3 Fish Oil will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

Ask a doctor if it is safe to breastfeed while using Omega-3 Fish Oil.

Do not give Omega-3 Fish Oil to a child without medical advice.

How should I take Omega-3 Fish Oil?

Use exactly as directed on the label, or as prescribed by your doctor. Read all medication guides or instruction sheets. Do not use more of this product than is recommended on the label.

Your dose needs may change if you switch to a different brand, strength, or form of omega-3 polyunsaturated fatty acids. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.

Over the counter (OTC) products should not be used to replace medication prescribed for you by your doctor. Ask your doctor, pharmacist, or other healthcare provider if it is safe to use Omega-3 Fish Oil.

Your treatment may also include diet, exercise, weight control, and blood tests.

Tell your doctor if you have a planned surgery.

Omega-3 Fish Oil can affect the results of certain medical tests. Tell any doctor who treats you that you are using this medicine.

Follow all storage instructions provided with Omega-3 Fish Oil. Your doctor or pharmacist can provide more information about how to store this medicine.

What happens if I miss a dose?

Take the Omega-3 Fish Oil as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking Omega-3 Fish Oil?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect Omega-3 Fish Oil?

Do not take Omega-3 Fish Oil without medical advice if you are using any of the following medications:

• blood thinners and medicine used to prevent blood clots.

This list is not complete. Other drugs may affect Omega-3 Fish Oil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

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Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Medical Disclaimer

Copyright 1996-2025 Cerner Multum, Inc. Version: 11.01.