We can't forget that Viagra was initially researched as a blood pressure medication. By accident, they discovered it helped in ED. They then dropped it as a blood pressure medication and went full bore with the ED market because it was wide open and there were millions to be made. That's why there were deaths from those who were already on blood pressure medications, because of bad interactions between medications.
Now with Cailis and Levitra, the competition is tough.
It's probably great for those who do have a physical ED, but those who don't need, they don't need it. Great sex starts with the upper brain.
