In low amounts, alcohol often causes good feelings, reddened skin, and feeling relaxed. People who drink small amounts of alcohol may feel less nervous about being around others. Even in small amounts, alcohol slows down the brain. Alcohol interferes with normal brain communication and changes a person’s behavior and mood. The ability to think clearly is often inhibited. Consuming larger amounts of alcohol can drastically affect motor functions via its effects on the brain. Commonly seen effects on the brain and the rest of the central nervous system (CNS) include slurred speech and issues with coordination. It starts to affect a person's judgment - their ability to make good decisions. It also makes a person react more slowly and have slower reflexes. This is why it is not safe to drive even after drinking just a little.