Rebecca Brachman : Could a drug prevent depression and PTSD?

TEDxNewYork 2017
Rebecca Brachman : Could a drug prevent depression and PTSD? (transcript)
Summary
It seems to be different, we think that medicines would be prepared by compounding something, though. 1)
In fact, a medicine of the first antidepressant was started from repurposing. Repurposing drugs mean to have approval and generic. It'll be available with a fraction of the price and the time though there are challenges that functional fixedness, mental set, and even policy.
The speaker explains it discovered accidentally, so it seems that accidental discovery is not uncommon in science.
Some medical reports of tuberculosis described that its patients were inappropriately happy and were dancing, many tests were run again and again, and it took a long time. Some medicines of tuberculosis were recognized that it was making people manic and it could suppress symptoms of mood disorders that are, for example, depression.
However, it doesn't mean to cure, so just the drugs suppress symptoms even now for mood disorders. 2) It means that patients basically have to keep taking drugs for the life of the disease. These drugs still have a lot of side effects and there are a lot of patients where they don't work.
Then the speaker's new idea is to use drugs to prevent mental illness as opposed to just treat it. 3)
She had accidentally discovered the first resilience-enhancing drug which works very quickly. Patients don't have to keep taking its drugs and it's not anything that you see with antidepressants.
Today, true causes of depression aren't discovered. 4) However, in 80 percent of cases, the initial trigger of depression is stress. If parents use the resilience-enhancing, they can have an ability to resist stress, bounce back, and not develop depression or other mood disorders when they experience stress.
Summarize. Today, true causes of depression aren't discovered yet, and antidepressants we know and we use now are to just suppress its symptoms. The drug that is the resilience-enhancing is also to only enhance resilience like putting to armor. Those mean not to cure or treat though developing your resistance and resilience must mean that people don't have depression or protect against stress and preventing patients from developing depression.
The ideas that are to use drugs to prevent mental illness as opposed to just treat it and to repurpose drugs have to be kept on guessing.

Words in this story
susceptible /adj/ likely or liable to be influenced or harmed by a particular thing.
contagious /adj/ (of a disease) spread from one person or organism to another by direct or indirect contact. infectious
resistance /noun/ opposition to, hostility to, refusal to accept
resilience /noun/ the capacity to recover quickly from difficulties. toughness