Stressed-out rats consume more alcohol, revealing related brain chemistry
Rodents that had been exposed to stress had a weakened alcohol-induced dopamine response and voluntarily drank more alcohol compared to controls, a new study has found. The blunted dopamine signaling to ethanol arose due to changes in the circuitry in the ventral tegmental area, the heart of the brain's reward system. Ref. Source 8h.
This makes plenty of sense honestly. Most people that I know that drink is usually stress induced, myself included.
I haven't seen this so much myself, since I'm more of a social drinker who doesn't often drink otherwise, but I can see why stress could lead to a person drinking more. Where it does seem to make a lot of sense.