Also known as: Provigil, Modalert, 2-Diphenylmethylsulfinylacetamide
Modafinil is a prescription wakefulness-promoting agent used to treat narcolepsy, shift work disorder, and obstructive sleep apnea. It is widely studied off-label for its cognitive-enhancing effects on attention, executive function, and memory.
Modafinil is a eugeroic (wakefulness-promoting) pharmaceutical that was originally developed in France and approved by the FDA in 1998 for the treatment of narcolepsy. It acts through multiple neurotransmitter systems, primarily by inhibiting dopamine reuptake via the dopamine transporter (DAT), while also modulating norepinephrine, histamine, orexin, and GABA pathways. Unlike traditional stimulants such as amphetamines, modafinil produces wakefulness without significant euphoria, sympathetic activation, or rebound hypersomnia. A comprehensive meta-analysis by Battleday and Brem (2015) concluded that modafinil enhances attention, executive function, and learning in non-sleep-deprived individuals. Modafinil is a prescription-only medication in the United States, the European Union, and most other countries. In Germany, it is sold under the brand name Vigil and requires a physician's prescription. It is classified as a controlled substance in some jurisdictions.
Modafinil is FDA-approved for promoting wakefulness in narcolepsy, shift work disorder, and obstructive sleep apnea, with robust evidence from numerous randomized controlled trials.
Meta-analyses show modafinil improves performance on tasks requiring planning, decision-making, and flexible thinking, particularly in complex cognitive challenges.
Single dose in the morning, or 1 hour before shift work
Prescription only. Start at 100 mg and increase if needed under medical supervision. Avoid late-day dosing to prevent insomnia.
Standard clinical use
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