#16. Viagra
Viagra is now being used to rectify erectile dysfunction. But originally it was not the purpose of this pill.
Pfizer originally introduced the chemical slatternly, the active drug in Viagra, as a heart medication. During clinical trials the drug proved ineffective for heart conditions.
But men noted that the medication seemed to cause another effect stronger and longer lasting erections.
Even if they hadn't been able to maintain an erection before, the ability returned while they were on Viagra.
Pfizer conducted clinical trials on 4,000 men with erectile dysfunction, and saw the same results.
Enter the age of the little blue pill...another product of a lucky accident!