Amphetamines are a class of stimulant drugs that affect the central nervous system. They increase the levels of certain chemicals in the brain, leading to heightened alertness, energy, and concentration. Commonly prescribed for conditions like ADHD and narcolepsy, they can help improve focus and reduce fatigue. While amphetamines can be beneficial when used as directed, they also carry a risk of misuse and addiction. Side effects may include increased heart rate, anxiety, and insomnia. It is important to use these medications under the supervision of a healthcare professional to minimize potential risks.