I Visited Dr Steven Morganstern's website which had an informative analysis of the 'P-Shot'. Apparently, he did a lot of early research on the P-shot in the early 1980's. He found that the results were not beneficial and presented the potential for penis trauma with repeated injections. He states that patients who have been getting the 'P-Shot' are one of the most common patients who see him for ED repairs! Dr Morganstern says P-shots can lead to Peyronie's disease and ED. Good information on his site.