Of the penisenlargement products on the market, pills make up the majority of the options. These pills can be broken down into three main categories. They are the prescription grade pill, non-prescription grade pill and generic online enhancement pills. Not all these pills are the same, nor are they all as equally effective. Prescription grade pills are those that can only be recommended and given by a physician. Traditionally, these are medications, like Viagra, that increase blood flow to the genitalia. Non-prescription medications are those that can be purchased over the counter in the store. They often contain herbal substances that make them a safer alternative. The innovative enhancements are those found online that have no clinical studies to support their claims and they often are not effective or they have dangerous side effects.