I'm sorry no one answered you sooner on this. Drugs feed depression--and by the time you're a drug addict, you are sending your depression into a tailspin with your drug dependency. There is no way the depression can be satisfactorily treated until the addiction is take care of--removed.

Aside from the fact that your drug habit may have caused extensive physical damage to you, it's certain isn't clouded the issues involved in diagnosing and treat mental health problems such as BPD, paranoia, chronic depression, and bipolar disorder. Your addiction has to be separated out from all the rest before the others can even be diagnosed with certainty.

I'm an alcoholic, and I didn't want to stop drinking--but nobody could even begin lifting my staggering depression or recognizing the bipolarity that masked it until I was functioning as a sober person again. Kicking the addiction ... that's Step One. I guess it's always Step One.