Mental Nurse often has very interesting and thought provoking blogposts. There has been a recent two-parter called 'My brother the alcoholic' – I would recommend that you give both parts a read so you can see exactly how the mental health system tends to treat people with mental health problems who also have an alcohol addiction.
And this is from a family member who knows the system – if you don't know the 'tricks' then you can guess what sort of service you get.
Read Part One.
Then Part Two.