The info with the pills, says to wait for an hour. I wouldn't wait four hours, some of the effect has probably already worn off. But if it starts to have an effect before the hour is up, I would go ahead.
All the ED pills are affected by what one has eaten prior to taking the pill, so the response can be different each time. I have found that if I take one early in the morning before eating or drinking anything, the response time is cut in half. Viagra used to make me hard in 15 minutes at 6:00 AM. This was prior to the surgery.
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
ED Status- Currently using Trimix, Levitra daily for increased blood flow.
Noctural Erections have completely returned on a nightly basis, same hardness as before.