A key indicator for predisposition to alcoholism is whether an individual feels sedated or remains alert after consuming more than a couple of drinks.

“And they're the ones that, if you've ever fallen asleep at a party for whatever reason, or you're getting tired and you're yawning, you're looking around the room and, like, these people are still drinking and partying and they're having what seems to be this amazing time, often, not always, those are the future alcoholics in the room, or those are the people that have a genetic predisposition for alcoholism, or those are the chronic drinkers, the people who have built up enough of a tolerance or who have the chemical genetic makeup such that increasing amounts of alcohol make them feel better and better and better.”