Are you on any other medications? To me, it doesn't sound like you have Prostate Cancer but I would defer to the doctors.
I started taking Viagra when I was in my early 50's due to hypertension medication. Started Cialis a year after that, my doctor was quite willing to prescribe both and also the max dosage so I could cut the pills in half to reduce the cost. If you read my profile, you will see that I had a very aggressive cancer. The PSA went from 4.1 to 10 in a year and my Gleason scores were high. But the viagra and cialis both worked fine prior to the surgery.
I also had by-pass surgery in 2005 and contrary to what you might think, I had to continue the hypertension medication. So I was also on the ED meds. The hypertension medication was Zestril and said one of the not common side effects was ED. But every guy is different and it sure made a difference for me.
PSA 2007 4.1
PSA 2008 10.0
Diagnosed April 2008
Biopsy: 6 of 12 cores positive
Gleason 4 + 5 = 9
CT and Bone Scan negative
Open surgery at Shawnee Mission Medical Center May 21, 2008
Right side nerves spared
Radical prostatectomy and lymph node dissection
Cather removed on June 3rd, totally dry on July 9th
lymph nodes negative
PSA Sept 28, 2008 0.00
PSA Jan 22, 2009 0.00