Of course, this is only for people who continually use their supplements every day. International Journal of Clinical Practice, 70 12 , Dehydroepiandrosterone and erectile function: A review. With all of that research, their potential side effects and contraindications are well-known. Serum folic acid and erectile dysfunction: A systematic review and meta-analysis.In , ExtenZe came under scrutiny of the FDA as a certain production lot of ExtenZe Plus was found to contain sildenafil, which is the active ingredient in Viagra. [7] Sports Doping Both professional football and Olympic athletes are banned from taking ExtenZe because the DHEA in ExtenZe is considered a performance-enhancing drug. Extenze is marketed as a nutritional supplement for men that will help provide bigger, harder, more frequent erections. It also says that Exenze will increase endurance for longer lasting sessions. According to the official product site. Pros ExtenZe is available without a prescription. It contains natural ingredients that may improve ED. It aims to work quickly. It is a fairly affordable product for ED. Cons The FDA recommends.