Side Effects of CoQ10

Coenzyme Q10 has been gaining attention lately as the heart-health and anti-aging supplement. Indeed it offers significant benefits in promoting heart health.

The article set Coenzyme Q10 Information reveals the extensive benefits of this vitamin-like substance so we won't talk about it here.

The good news is that 99% of the people taking CoQ10 should have nothing to be concerned about regarding side effects. Read on for the full discussion...

Recommendations and Comments Regarding Side Effects of CoQ10

Although scientific literatures report many side effects, they often do not report how frequently these side effects can be expected.

Indeed, by law, FDA requires drug manufacturers to report any and all side effects even if only one volunteer experienced it out of one thousand. (That's why the list of side effects of most prescription medications is incredibly long!)

So, in keeping with the tradition of FDA, here's the list of side effects of CoQ10:

  • nausea and vomiting
  • diarrhea
  • headaches
  • heartburn
  • stomach discomfort
  • fatigue
  • rash on the skin
  • suppression of appetite
  • flu-like symptoms

But how frequent do these events occur?

Less than 1%. That's 1 person in 100 who take coenzyme Q10. The odds are excellent that you would not be that one person.

And if you do happen to be that 1 person out of 100, divide the dose up.

For example, instead of taking 200 mg once daily, consider taking 100 mg twice daily. Or if you plan on taking 300 mg daily, split the dose up and take 100 mg three times daily instead.

See Recommended CoQ10 Dosages to Use to find out appropriate amounts to use for various health conditions. Most studies support using between 100 to 200 mg daily, a dosage that is very well tolerated by almost everyone.

Other Potential Adverse Reactions

Coenzyme Q10 may lower blood pressure (isn't this a good thing?). Obviously, if you are currently on a blood pressure medication, dosage adjustment may be needed. See CoQ10 for Blood Pressure for more information on this particular use and benefits.

For people undergoing chemotherapy for cancer, some experts believe that taking CoQ10 might protect the cancer cells from being killed by the drug. However, ther is also evidence that it may be helpful in treating cancer (See CoQ10 for Cancer for more information).

If you are undergoing chemotherapy, you will need to discuss this concern with your specialist before considering taking CoQ10.

In the past, CoQ10 was suspected to reduce the effects of blood thinners like warfarin (Coumadin). However, recent studies show that CoQ10 does not seem to have blood-thinning effect for people who are stabilized on blood-thinners.

Bottom Line

The importance of taking coenzyme Q10 supplement is slowly being accepted by health care professionals.

99% of people taking this supplement will not experience any significant side effects.

Individuals who are on a statin-type prescription cholesterol lowering medication should seriously consider taking a CoQ10 supplement.

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Selected References for Side Effects of CoQ10

Revised: December 15, 2016

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