It is relatively safe to take an appropriate dose of Coenzyme Q10 (30 ml to 200 mg per day for adults), and there are no reports of serious side effects. There may be mild side effects such as insomnia or indigestion.
It is important to note that the National Institutes of Health (NIH) does not recommend children to take Coenzyme Q10 unless under the guidance of a doctor.
Coenzyme Q10 may interact with the anticoagulant warfarin and insulin, making these two drugs ineffective. The efficacy of warfarin is affected, which may increase the risk of blood clots.
Coenzyme Q10 may not be compatible with certain types of cancer therapies. If you are undergoing cancer treatment, please consult your doctor if you can take Coenzyme Q10.