Coenzyme Q10 Adverse Reactions and Interactions:
Coenzyme Q10 side-effects were minimal when used by many age groups and may safely be used in children and in women who may become pregnant (1). Allergic skin rash after taking coenzyme Q10 has been reported (4). A study demonstrated that warfarin was cleared more rapidly by coenzyme Q10 which reduced the effect of anticoagulation (32), therefore if coenzyme Q10 is taken with warfarin, PT INR (prothrombin time international normalized ratio) will need to be monitored especially in the 1st 2 weeks of CoQ10 supplementation and warfarin may need to be increased.
Coenzyme Q10 food content in mg per kilogram, adapted from Pravst, I et al. (38):
Soybean oil, 54–280 mg/kg