I posted a while ago about my brothers past alcoholism and his mental health and got some really great support, so, hope you dont mind me bringing it up again.
My mum took my db to the doctors as she was worried about his deteriorated mental health.
When he was there, he admitted he has started drinking again, about 6-8 cans a night. 
He almost died through drink, he could be a bloody awful drunk. My head is spinning and I just cant process it at all. Hes been 'clean' for so long. The doctors worried about his kidney/liver function so hes to go in for tests next week.