interesting question. recently a major review of published literature on the benefit of various vitamins on health was undertaken. this showed that in adults who take a generally healthy diet, vitamin supplementation had no role in preventing disease or promoting health. so, basically, there is no benefit to continuing CoQ or other vitamins. having said that, I tell my patients that I will leave it up to them if they want to continue taking vitamins. there is no interaction between CoQ and blood pressure medicines so your husband need not worry about taking the medicine with the vitamin.