Coenzyme Q10 is a naturally occurring chemical that helps your cells make the energy they need to grow and function, according to the National Cancer Institute. Coenzyme Q10 also works as an antioxidant, which protects the body from dangerous chemicals known as free radicals that can damage your genes. Some people use coenzyme Q10 to treat cancer, heart problems and many other conditions. These uses are unproven, however, and dangers can arise. Talk to your doctor before taking this supplement.
Common Side Effects
Coenzyme Q10 does cause side effects, but few of them are serious, according to the National Cancer Institute. The most common side effects are sleep problems, rash, nausea, vomiting, diarrhea, indigestion, appetite loss, abdominal pain, lightheadedness, light sensitivity, irritability, headache, heartburn and fatigue. Some people have reported elevated liver enzymes after taking coenzyme Q10, which can indicate potential liver damage and is a potential problem for those who already have liver disease. If you have liver disease, do not take coenzyme Q10 without talking to your doctor first. You may be able to reduce side effects by taking smaller doses of coenzyme Q10 throughout the day, rather than one large dose all at once, according to MedlinePlus.
Warnings
Because coenzyme Q10 is an antioxidant that neutralizes free radicals, it may interfere with conventional cancer therapies like chemotherapy or radiation therapy, which work in part by forming free radicals to attack cancer cells, according to the National Cancer Institute. Researchers are studying whether coenzyme Q10 makes a difference, good or bad. Coenzyme Q10 may also lower your blood pressure, which could be a problem if your blood pressure is already low or you are taking drugs to lower it, according to MedlinePlus. You should stop taking coenzyme Q10 two weeks before any scheduled surgery because of the risk that it could create blood pressure problems during surgery that could lead to complications. In addition, coenzyme Q10 may lower blood sugar levels, which could be dangerous if you have diabetes or hypoglycemia. One report notes coenzyme Q10 causing a drop in platelets, which increases the risk of bleeding problems, according to MayoClinic.com. If you have any of these conditions, consult your doctor before taking coenzyme Q10. Women who are pregnant or breast-feeding should avoid coenzyme Q10 because there is not enough evidence about its safety.
Drug Interactions
If you are on medication, talk to your doctor or pharmacist before taking coenzyme Q10; it may interfere with a number of drugs, making them less effective or increasing the risk of side effects. Drugs that may interact with coenzyme Q10 include anti-cholesterol medication; blood pressure drugs; diabetes medications, including insulin; and blood thinners like warfarin, according to the National Cancer Institute.
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