Tylenol does help, not completely. I have tried taking it before the viagra and the headache still comes on. I'll go to sleep and in the morning it is pretty bad still. The effects of the viagra is still worth it.
Also, I have found that if I take 50 mg, at say 9 PM, me and my GF have awesome sex, and then in the morning, say 12 hours later, the viagra still works like a champ! I thought it was only supposed to work 4 hours or so, but for me it works quite a bit longer if I take it within a few hours of going to sleep. And SloppyJ, I have noticed the florescent lights in my house take on a bluish hue to them sometimes on viagra, no tracers though.
I would never try Viagra, anything that has blindness as a possible negative side effect scares me off. Have you tried Pt-141? That shit is amazing me and my wife experimented with it for a little while. The great thing is its just as powerful effect on woman. And it's great for multiple sessions until it wears off. We would take it then fuck all night. The worst side I got from it was naseua, and a little flushing.