Brands such as Four Loko, Tilt, etc.
Mixing alcohol with caffeine creates a different effect than if someone were to be drinking alcohol alone. Caffeine is a drug, more importantly a stimulant. When alcohol is mixed with a stimulant people do not feel the sleepy effect that alcohol has, which is usually when people know it is time to stop drinking or they fall asleep. If someone has caffeine in their system and drinking alcohol, they will not get as sleepy so they continue to drink causing their BAC to increase to dangerous levels.
Four Loko is different because of its alcohol content and size. Four Loko facts: