Wywriter,
Do you have an ER in proximity?
If your AH experiences DTs, and since your description of him lately suggests end-stage, he is at substantial risk of alcohol withdrawal syndrome, which itself could kill him from cutting off alcohol consumption cold turkey:
The severity of the alcohol withdrawal syndrome can vary from mild symptoms such as mild sleep disturbances and mild anxiety to very severe and life threatening including delirium, particularly visual hallucinations in severe cases and convulsions (which may result in death). These symptoms appear characteristically on waking, due to the fall in the blood alcohol concentration during sleep. The severity of alcohol withdrawal depends on various factors including age, genetics, and, most importantly, degree of alcohol intake and length of time the individual has been misusing alcohol and number of previous detoxifications.
(Above from wikipedia "alcohol withdrawal syndrome")
From your descriptions lately, it sounds like he's been looking sicker, and on a worse bender. These are both high risk factors to fatal alcohol withdrawal complications.
CLMI