hello I think that there is a bit of confusion with my question! I was asking which one is better of Viagra or Cialis for long term use, over a long period of time - possibly for rest of my life? Im not sure which to go for, just trying to decide with the help from other people who have used both. Tommy - does that mean you had an erection solidly for 36 hours? By golly, thats a long time! DP