I am 67 and I used Viagra for 3 years. I bought the first pill of this drug when my friend said that with it his life was amazing. I went to my Dr. and asked him may I to try Viagra or no. The doctor said that I may to try, but very necesary to know that this drug may have side effects and I must call at once, if I have changes with my health. I noticed that Viagra works better early in the morning or before a meal. Have had loss of vision and headaches but that is not terrible, because my sexual life is amazing. Visit the next site and read about other drugs!