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What Are the Coenzyme Q10 Side Effects?

Submitted by on October 17, 2011 – 2:56 amNo Comment




The Coenzyme Q10, which is also referred to as CoQ10 can be described as a vitamin-like component produced within human body. In spite of being produced naturally within the human body, supplementation of Coenzyme Q10 is known to cause a number of side effects. However, the side effects triggered by this component rarely turn serious. Majority of the people consuming supplements of Coenzyme Q10 tolerate them quite well; only a few among them experience side effects. In this article, we’ll be discussing about the main possible Coenzyme Q10 side effects.

Studies conducted around the world for finding out the side effects of Coenzyme Q10 supplements have shown that this vitamin like components are unlikely to result in any severe side effect. However, these studies definitely inform about possibility of Coenzyme Q10 side effects that should be reported immediately to your doctor. Experiencing those side effects might indicate that you should discontinue the use of the CoQ10 supplement. Below we have discussed some such side effects of CoQ10 supplements:

  • Fainting or dizziness, which mainly occurs due to decrease in blood pressure levels after intake of CoQ10 supplements
  • Increase in liver enzymes; however, studies conducted in recent times has shown that use of CoQ10 supplements might not be related to occurrence of this side effect
  • Allergic reactions marked by symptoms like appearance of hives and rashes, itching sensation, wheezing, swelling, breathing difficulties and difficulty in swallowing

The CoQ10 supplements are usually regulated like dietary supplements and not as medicines. As the dietary supplements do not get regulated as closely as the medicines, there are higher possibilities that they contain impurities or possess less or more of amount of active ingredients compared to what is mentioned on their labels. Manufacturing defects or presence of impurities in certain poor quality CoQ10 supplements available in the market can affect human health adversely. Thus it is extremely important that you buy CoQ10 supplements belonging to reputed brands.

There are instances when people taking these supplements experience gastrointestinal side effects like nausea, diarrhea, vomiting, heartburn, decreased appetite, discomfort in the throat and upper chest etc. If these Coenzyme Q10 side effects do not go away within a few hours of taking the supplement, you should immediately contact your physician.

Other than causing the above mentioned side effects, the Coenzyme Q10 supplements might also result in drug interaction. So, whenever your doctor asks you to take certain dosage of Coenzyme Q10 supplement, inform him about the medications you are already taking. These supplements can reduce the efficacy of certain medications causing aggravation of health problems for which those medicines were prescribed. Coenzyme Q10 is known to interact with medications like warfarin, tricyclic antidepressants, thioridazine, propranolol, fluvastatin etc.

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