QUOTE : Addiction to alcohol is also a neurological phenomenon, the result of a complex set of molecular alterations that take place in the brain when it’s excessively and repeatedly exposed to the drug. The science of addiction is complicated, but the basic idea is fairly straightforward: alcohol appears to wreak havoc on the brain’s natural systems of craving and reward, compromising the functioning of the various neurotransmitters and proteins that create feelings of well-being.