Psychostimulants are a class of drugs that enhance brain activity, leading to increased alertness, attention, and energy. They work by increasing the levels of certain neurotransmitters, such as dopamine and norepinephrine, in the brain. Commonly prescribed psychostimulants include medications like amphetamine and methylphenidate, which are often used to treat conditions like Attention Deficit Hyperactivity Disorder (ADHD). These substances can improve focus and concentration, making them beneficial for individuals with attention-related issues. However, they can also have side effects, including increased heart rate, anxiety, and potential for misuse. It's important to use psychostimulants under medical supervision to minimize risks.