Medical testing steps?

Question

what are the steps in order of medical testing before they get to testing on people and then

Answer 1

someone has an idea, they search literature to make sure somone else didn't already have the idea/look for supporting data for the idea, do in vitro tests, use results from in vitro tests to do in vivo tests, get permission from a regulatory agency to do in human tests, do more in human/ in vivo tests to make sure the "idea" is safe/efficacious/will benefit society, and voila! new drugs....

mind you, this chain of events happens over the course of as little as 2 years to on average 10+