just a note from a alcoholic
Ask him to call an AA hotline because his body is rejecting everything. I have been sober 2 years this past saturday and have seen people with Alcohol problems lose 80/100 lbs in a year or less and survive if they quit. BUT HE WILL HAVE TO BE THE ONE TO QUIT! It is a self diagnosed disease but very treatable. Usually a dollar a session or less. He is in need of help really soon!
May God be with you.