I can tell you my experience. The doses mentioned on the label seem high but just about a maximum dose effect for Vialis a mixture of Viagra and Cialis. No side effect for me. Because of the Viagra It only takes one hour and you can eat. The Cialis takes more like two hours and eating effects it. I would say fully effective for 36ish hours and works after one hour. I can fit three good encounters in but don't always. I started to cut pills and it worked but a pill and a half slightly better. You could order the Cialis and cut it to quarters for every day. Thinking of doing that. Great for your blood pressure but don't overdo it. I took two name brand Viagra and went blind with the girl and just didn't let on and it went away. Serious stuff though. I would recommend it easily but always be cautious. I assume the straight Viagra is good same with the straight Cialis. Fast shipping too and discrete. I can and do perform quite well but still takes two to tango but I'm not bulletproof so it doesn't feel fake at all got to be aroused. Short answer probably wanted, yes same sort of thing.