This is a topic which bothers me so much, I really want to write an article about it. I have allot to tell.
But on a practical note, I think it's best to get along with as less medications as possible by a healthy lifestyle and therapeutic activities (therapy, meditation, organized room, aquarium, comfortable friends, and many more). There's a term I once found on YouTube called "green psychiatry". The whole point of it is to take psychiatric medications if no other non-drug solution works. This includes blood test results (lack of iron for instance), checking if there are symptoms such as insomnia...