right, but in the link I provided he mentions taking pills pre surgery and then waiting up to 4 weeks post surgery, right?
"In a recently published study, Mulhall and coworkers18 followed 132 patients through an 18-month period after they were placed in “rehabilitation” or “no rehabilitation” groups after radical prostatectomy. Patients undergoing rehabilitation agreed to take sildenafil or intracavernosal alprostadil to induce erection 3 times weekly starting within the first 4 weeks after surgery"
"In a study by Padma-Nathan and colleagues,27 patients were randomized to either nightly sildenafil treatment or placebo for 36 weeks, starting 4 weeks after nerve-sparing radical prostatectomy."
"Recently, Raina and coworkers20 have evaluated the daily use of a vacuum constriction device (VCD) beginning within 2 months after surgery in patients undergoing nerve-sparing radical prostatectomy or non-nerve-sparing radical prostatectomy"
"Zagaja and colleagues21 found that men taking oral sildenafil within the first 9 months of a nerve-sparing procedure might not have any erectogenic response, thus calling into question their use in early penile rehabilitation."
www.ncbi.nlm.nih.gov/pmc/articles/PMC1751036/