I don't mean to sound thick but can someone explain what these things are?

6 bars of xanax, 4mgs klonopin, 40mgs oxycontin

Are they a prescribed drugs from a doctor or can you buy them over the counter at a shop?

Spector how did you come to get addicted to them? Was it a gradual thing where you start to take more and more or was it just that one day when you didn't have any you suddenly felt the way you just described?