Sexual dysfunction can have many causes; however, replacing hormones is the best way to start treatment. We suggest raising your testosterone to a healthy level along with an Adult Growth Hormone Deficiency Evaluation (if cost is not a prohibitive factor). There are also products for men (ie: Viagra or Cialis) that increase the amount of nitric oxide in the blood to aid sexual mechanics, but these products have no effect on Libido. We strongly recommend not using a product such as Viagra or Cialis without first taking care of testosterone levels. Using only Viagra or Cialis, you may find that the mechanics are temporarily fixed, but you will not have a desire to use the erection.