My trippy friend keeps trying to kill himself, what do I do?

[kake]

My friend has mental problems, more than he cares to tell us about.
He always wants to be fucked up, reality just doesn't capture his attention any more, though he's usually triping his nut off whether he's on something or not because theres acid sitting at the base of his spine.

He's tried asking for help, he called the hotline and was whisked away to a hospital where they were trying to get rid of the trippyness, but he ended up going against the doctors orders and taking drugs anyway, mixing them with his perscriptions (which were mental anti depressants that made him buzz). Not only does he do it to the point where he has no idea what's going on around him, but he does it around us and expects us to be ok with the fact that he's fucking himself up and leaving us to deal with the vacant husk he leaves behind when he goes to build divine connection.
He also suffers from fits and has recently found a lump on his breast that he thinks might be cancerous.
His parents and his friends have been supporting him in every way they can, he knows we love him and we don't want to be without him. They even got him a puppy which has really lifted his spirits and given him something to look forward to when it has puppies of its own.
Last I heard, my friend was loitering around the local 'drug pickup point' looking INCREDIBLY sick, with "green blotches on his skin" he hasnt slept in about four days and still has the remnants of 30 mephamphetamine based pills that no one would buy from him.
I dont know what to do, it seems no matter what we say, he just wants to get fucked up and says no one will ever understand.
Actually is mentally ill, thats not a lie.