It depends on the person. Some people are high functioning--or possibly misdiagnosed-- and I do believe they can survive without them.

When I don't take anything for my panic disorder and bipolar, my mind unravels. I've tried to jump out of cars, I've ran around in traffic, I've rolled around in the front yard in the dirt going crazy....and so much more.

It's taken me years to accept it, but there is something wrong with my brain. And no amount of talking, breathing, or meditating is going to fix it.