Buy Provigil Online also known as modafinil, is a prescription medication used to treat sleep-related disorders like narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It belongs to a class of drugs known as wakefulness-promoting agents. Provigil works by affecting certain chemicals in the brain to enhance wakefulness and alertness, making it useful for those who need to stay awake during irregular hours. It's known for its ability to improve cognitive function, concentration, and productivity. However, it should only be used under medical supervision due to potential side effects and interactions with other medications. Always follow your healthcare provider's instructions when using Provigil. It comes in two variants: Provigil 100mg and Provigil 200mg.