I have never tried Viagra, is there anyone out there that has? What are the effects? I have heard that it causes people to see a blue tinge when they use the drug. I understand that it comes in 4 strenths.( each strenth dobling in consentration) If that is true then why don't I just buy the strongest consentration of Viagra and cut it into 4? What about the 2 new Viagra imitators, any 411 on these drugs?