If an alcoholic does not seek alcohol rehabilitation, what are the risks?

Can you answer angela s’s question about Addiction?:

I know quite a number of people (some of them are my friends) who are alcoholics and do not seem to have any plans of going to alcohol rehabs. I don’t think they understand fully the consequences of their actions. I would like to enlighten them about the negative effects of not getting treatment for their addiction.

Prescription Drug Abuse Symptoms