Modafinil 200mg is a prescription medication primarily used to treat excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work sleep disorder. Unlike traditional stimulants, Modafinil promotes wakefulness without the common side effects such as jitteriness or increased heart rate. It works by increasing the levels of certain neurotransmitters, such as dopamine and norepinephrine, in the brain. Many people also use Modafinil off-label as a cognitive enhancer to improve focus, concentration, and memory during extended periods of work or study. Despite its effectiveness, Modafinil should be used with caution, as it can lead to dependency if misused. Common side effects include headache, nausea, and dizziness. Modafinil is generally well-tolerated when used as prescribed but should only be used under the supervision of a healthcare professional.