Was because of the potent ingredient Cialis was involved. It helps promote a large increase in blood flow throughout the body. This is the best caliberx method to use when it comes to curing erectile dysfunction. The problem with using this ingredient is that it can cause large decreases in blood pressure that can be very dangerous for men of any age. Most natural formulas utilize natural aphrodisiacs like Yohimbe and Epimedium because they do not come with adverse side effects and can be very potent on their own. It is good that this product worked for men when it was available but the potential adverse side effects were too risky for a product that did not require a prescription.