Viagra: The grand daddy of them all. This is the one that started the trend. This is the standard through which all other erectile dysfunction drugs are measured against. Viagra is made by Pfizer, which is one of the most trusted pharmaceutical companies in the world. It is the product of extensive research, and its effects are carefully calculated to prevent any adverse effect to one's health especially resulting from too much of it. To demonstrate this, Viagra is made to be effective for only a couple of hours. This is to make sure that a man's health will not suffer from having sildenafil citrate in the bloodstream for a long time.
Soft Viagra: Thinking that Viagra could not get any better? Well, here's how the famous and trusted brand was made even better to make it more effective for the treatment of erectile dysfunction. Soft Viagra is made from softer substances, which make it easy for the body to absorb. Pop one of these and feel the heat in as a fast as 15 minutes.
Levitra: The newcomer in the field of erectile dysfunction drugs. Levitra uses a far different substance than either Viagra or Cialis. The manufacturer of Levitra advertises it as something that causes very minimal in terms of side effects. However, because it is new to the market, it may not measure up to the competition unless it is of excellent quality.