When alcohol enters your body, it feels like it “loosens you up,” but what it’s actually doing is slowing down your brain’s control center.
Let’s break it down: alcohol boosts the calming neurotransmitter GABA and suppresses glutamate, which is why you feel relaxed but also less sharp. It binds to the GABA receptors, further magnifying their calming effects while simultaneously blocking glutamate’s receptors. This results in reduced self-control while under the influence of alcohol, while long-term use actually reverses these effects due to the brain’s ability to maintain balance by reducing GABA and increasing glutamate. When alcohol is no longer consumed, this adaption results in anxiety and withdrawal, creating additional dependence on the substance.
That’s why after a few drinks, your judgment, reaction time, and decision making start to waver.
Alcohol also triggers a dopamine release, which makes drinking feel rewarding and keeps you coming back for more, making it addictive. While the GABA and glutamate changes create the physical relaxation in the prefrontal cortex, the dopamine response taking place in the ventral tegmental area, the dedicated area for the brain’s reward system, is what creates the “buzz” many chase after.
Over time, your brain adapts by reducing its natural balance, which can make you feel more anxious when you’re sober. This is why some people drink to relax, but end up needing alcohol just to feel stable.
Even moderate drinking can disrupt sleep. This especially applies to REM sleep, which affects memory and mood even when you sober. Regular use of alcohol is linked to increased risk of depression and anxiety, not just temporary mood swings. In developing brains (teens and young adults), alcohol can interfere with long term memory formation and learning.
Alcohol doesn’t just “take the edge off,” it changes how your brain handles stress, reward, and control, leading to a variety of issues that leave lasting impacts on the brain.