Stimulant medications are a class of drugs commonly used to treat conditions like Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. They work by increasing the levels of certain neurotransmitters in the brain, which helps improve focus, attention, and impulse control. Common stimulant medications include methylphenidate and amphetamine. These medications can be effective for many individuals, but they may also have side effects such as increased heart rate, insomnia, and anxiety. It is important for patients to work closely with their healthcare providers to find the right dosage and monitor any potential side effects during treatment.