Does fish oil interact with other medications?

Little is known about fish oil’s interaction with other medications. But because it has been shown to affect triglyceride levels in the bloodstream, it can react with certain medications that have an effect on the blood. Fish oil may interact with medications such as:
  • Non-steroidal anti-inflammatory drugs (NSAIDs) such as aspirin, ibuprofen, or naproxen,
  • Anticoagulants (“blood thinners”) such as warfarin,
  • Anti-platelet medications such as clopidogrel,
  • Beta blockers, such as atenolol, carvedilol, labetalol, metoprolol, propranolol, sotalol, or timolol,
  • Blood pressure medications,
  • Diabetes medications,
  • Diuretics (“water pills”) such as hlorothiazide or hydrochlorothiazide,
  • Estrogen supplements such as birth control pills or hormone replacement, and
  • Medications to lower “bad cholesterol” (low-density lipoprotein), such as atorvastatin and lovastatin. Fish oil may add to the effects of medication that lowers triglyceride levels, such as gemfibrozil or cholestyramine
Because little is known about the exact effect of fish oil on the body, this list is incomplete. Tell your doctor about any medications you are taking before you start taking fish oil supplements. If you need to start taking another medication at the same time as fish oil, consult with your doctor first.

Continue Learning about Dietary Supplements

Dietary Supplements

Whether you're visiting the drug store, grocery or natural food shop you'll likely find an aisle where there are jars and bottles of things for you to put in your body that are neither foods nor medicines. Ranging from vitamins an...

d minerals to fiber and herbal remedies, these supplements are not regulated in the same way as either food or medicine. Some of them are backed by solid research, others are folk remedies or proprietary cures. If your diet does not include enough of certain vitamins or minerals, a supplement may be a good idea. Natural treatment for conditions like constipation may be effective. But because these substances are unregulated, it is always a good idea to educate yourself about the products and to use common sense when taking them. This is even more true if you are pregnant or taking a medicine that may be affected by supplements.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.