Whenever you purchase generic cialis or viagra you have to wonder if it is fully dosed as labeled. I have had E/D problems for many years. If I buy viagra from a pharmacy 1/2 of a 100mg pill does the trick. But, when I buy the cheapest generics I can find I have to take 6 of their 100mg pills to equal 50mg or half of a real one. Since I have problems I know what my body needs to work and have found that the cheap stuff I have used does not equate to what they claim. I have never purchased anything from the sponsors on this sight and am not knockng any of their products. I am just speaking about other places I have tried. Good luck.