Advice for my father health. And advice.

My dad is 68 yrs old, he is having all bad habits smoking, drinking, Gutka etc. He is under medication as he is under influence of alcohol, doctor has given such a powerful sleeping Tablets that he is not in conscious mind, we have stopped giving sleeping Tablets since couple of days due to weakness in his body. He is not having proper home food. he is also facing with breathing problems so doctor gave neubalisaton and said him to stop smoking and drinking. He is becoming weak as he is not having proper food at home. If he eats oily food he is getting vomiting sensation. He is having 2 to 3 motions in a day. We are trying to give him liquid food and juices. As he is aged person he sometimes not listens to us. Please advise how to go about in recovering my father from this. Need your help and advice.