Modafinil is a medication used to promote wakefulness and alertness in individuals with sleep disorders like narcolepsy and obstructive sleep apnea. Modafinil has also been used off-label to enhance cognitive function and productivity in healthy individuals, particularly those who work long hours or have irregular sleep schedules. While generally well-tolerated, modafinil can cause side effects like headache, nausea, and anxiety. It is important to only take modafinil under the guidance of a healthcare provider and to avoid using it as a substitute for adequate sleep. There are two variants available: Modafinil 100mg and Modafinil 200mg.