What drives us to drink

The mechanism behind the need for an evening relaxer
drinking beer
Researchers at the University of Adelaide have discovered a new link between the brain's immune system and the desire to drink alcohol in the evening and there does appear to be an antidote to this age-old problem.
 
Taking the opiate antagonist naltrexone appears to stop this impulse by blocking the immune receptor - toll-like receptor 4 (TLR4)