Acacia
Taking coenzyme Q10 with acacia gum seems to increase the body's absorption of coenzyme Q-10. In theory, this might increase the effects and side effects of coenzyme Q10.
Beta-carotene
Coenzyme Q10 can increase blood levels of beta-carotene. In theory, this might increase the effects and side effects of beta-carotene.
Herbs and supplements that lower blood pressure
Coenzyme Q10 might decrease blood pressure. Combining coenzyme Q10 with other herbs and supplements with that lower blood pressure might make blood pressure go too low. Some of these herbs and supplements include andrographis, casein peptides, cat's claw, fish oil, L-arginine, lycium, stinging nettle, theanine, and others.
Omega-3 fatty acids
Combining coenzyme Q10 with omega-3 fatty acids can reduce blood levels of coenzyme Q10. In theory, this might reduce the effects of coenzyme Q10.
Red yeast
Red yeast might reduce coenzyme Q10 levels. In theory, this might reduce the effects of coenzyme Q10.
Vitamin A
Coenzyme Q10 can increase blood levels of vitamin A. In theory, this might increase the effects and side effects of vitamin A.
Vitamin C
Coenzyme Q10 can increase blood levels of vitamin C. In theory, this might increase the effects and side effects of vitamin C.
Vitamin E
Coenzyme Q10 can increase blood levels of vitamin E. In theory, this might increase the effects and side effects of vitamin E.
Vitamin K
Coenzyme Q10 can have effects in the body that are similar to vitamin K, including inhibiting the effects of blood thinning drugs such as warfarin. Taking coenzyme Q10 with vitamin K might increase the risk of blood clotting in people taking blood thinning drugs.