Hmm, it seems to me that it is best to go on a detox course or, for example, contact a specialist to help you stop drinking alcohol.
Alcohol addiction is very scary and needs to be treated. So you need to contact a specialist as soon as possible so that your friend can be helped. My brother also had an alcohol addiction, so I understand you. As soon as I found out about my brother's addiction, I immediately began to look for ways to help him. One doctor advised the site https://fherehab.com/detox/ where you can find a special detox program. And it really helped my brother, he began to gradually give up alcohol. I think that such a detox program will help your friend too.