Kiddo,
i say this with concern for you, from reading the above post, I suspect you were high on something(s) when you wrote it & that plus the additional information says to me that you have some tough decisions to make.
You said in your first post that you wnated to lead a more normal life & make something of yourself???? Well, as things are you have no hope of doing that.
To change your life you have to make some changes to your behaviour, like get help & kick the drugs (illegal) & reduce the meds (legal) also get some help with your emotional baggage (counselling) - all that anger, hurt, frustration etc that you're carrying around about your parents (how they deserted you, the drugs they used that affected you & the mental health problems they've passed onto you etc).
If you do not get off the drugs(illegal) & reduce the meds(legal) & get counselling you will only get worse, the choice is yours, no-one else's. While your parents have alot to answer for, you are now an adult & have to take responsibility for yourself.
As to reducing the prescibed meds - check out natural alternatives (try a search engine like google or yahoo to start) including naturopathy, homeopathy, herbal, vitamins etc etc. You sure won't be worse off for giving it a try & you might be better off.