Testosterone for Penile Rehabilitation After Radical Prostatectomy

Inclusion Criteria: * Males, 18 years of age or older, with low testosterone levels. * Must have undergone a bilateral nerve sparing radical prostatectomy. * Nadir PSA (Prostate-Specific Antigen) values should be less than 0.01 ng/ml on two consecutive occasions separated by 4 weeks at the start of treatment. * Must give informed consent. * Must be willing to complete follow-up visits. Exclusion Criteria: * Testosterone level greater than 300 ng/ dl * Hemoglobin level greater than 18 ng/dl. * Positive surgical margins or evidence of residual prostate cancer after surgery. * Clinically suspected advanced disease or actual evidence of metastatic prostate cancer. * Primary Gleason Grade greater than 3 or secondary Gleason Grade greater than 4 in the final pathologic specimen will be excluded. * Taking nitrates or with contraindications to the use of Viagra or androgen therapy will be excluded. * Known hypersensitivity to any component of the tablet will be excluded.