See that's where you're wrong, and most of the people in the whole country! Dr's can't possibly keep up on every drug out there. They don't even try! They have their go to medications for your run of the mill problems. When it comes to new drugs that are constantly being pushed by big pharma, the docs go by what their salesmen tell them, and whatever the pharmaceutical company puts in their literature. Occasionally they might read a study from a journal, but that doesn't happen very often.  The dr's don't know! They depend on the word of others. Most of the time th  7ffa  ose others are more concerned with pushing their products than helping people.