I am getting no results from Viagra, however I do have some info on the empty stomach issue. If I take my Viagra on a 3-4 hrs empty stomach, I get the chest and face flush (rash), with the warm feeling in the face , heartburn and increased sensitivity on feeling my heartbeat. If I take the same on a stomach with any food in it, then the response is varied in intensity according to how much food I have eaten. I ate a good sized snack last night followed by 50mg of Viagra and felt none of the effects that I get on an empty stomach. All people being different, for me food on the stomach does make a big difference in the way I feel when taking it. Whether this affects the ability to get an erection I can't answer, as I am not to that point yet.