Dexamphetamine is a prescription medication primarily used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. It belongs to a class of drugs known as stimulants, which work by increasing the levels of certain neurotransmitters in the brain, helping to improve focus, attention, and impulse control. This medication is available in various forms, including tablets and extended-release capsules. While Dexamphetamine can be effective for many individuals, it may also cause side effects such as insomnia, increased heart rate, and anxiety. It is important to use this medication under the guidance of a healthcare professional.