Viagra makes your body allocate bloodflow to the region. Of course it will work, ive tried it, if you take too much you get a headache, drink lots of water and less is more. Warning if you dont need it you kinda become dependant and my otherwise strong erections became mediocre in comparison the days after usage. I think if you dont need it its a waste of time. Normal wood without a blistering headache is waay better imo. It seemed to work better the second time and timing is key. Theres a large psycological component to most ED cases, thinking you need it can make an other wise normal libidoed man aprehensive and doubtful when having to go without it.