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Since the advent and commercial availability of Sildenafil Citrate in 1998, (known throughout the world to one-and-all as Viagra), the market for treatments for erectile dysfunction has grown to become worth about $2 billion worldwide per annum. That is now projected to grow to $4 billion per year by the year 2004 and to an astonishing $6 billion per year by 2006! Results of recent surveys indicate that, on average, 15% of the male population has suffered from erectile dysfunction. As a strong indicator of its age-related increase, more than 50% of men over the age of 60 have varying degrees of erectile dysfunction (ED). So it may not be surprising that it is estimated that ED affects approximately 31 million men in the United States, and as a whole, there may be as many as 300 million men around the world suffering with ED! Some men prefer Viagra or Sildenafil Citrate, some prefer Cialis or Tadalafil thr generic cheaper version with free samples online availble from sources like pillsamples.net In order for us to ascertain the difference between the new treatments for ED when compared to Viagra or Generic Viagra, it is first necessary to remind ourselves of the properties of Pfizer's stock market winner. Viagra is rapidly absorbed by mouth with a bio-availability of about 40% and peak concentrations of the chemical are in the blood within 30-120 minutes. This has been one of the advantages for Viagra and Generic Viagra, in that it is capable of being taken as a tablet and is relatively quick-acting. A convenient factor when perhaps one's partner won't wait forever!
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