https://genericpharmas.com/product/vilafinil-200/

Vilafinil 200mg, sold under the brand name Provigil among others, is a medication to treat sleepiness due to narcolepsy, shift work sleep disorder or obstructive sleep apnea. The effects of Vilafinil include cognitive enhancement, mood enhancement, alertness and in some cases mild euphoria.
For shift work sleep disorder (SWSD), take one Vilafinil 200 pill once a day. Make sure to take your dosage at least an hour before you begin your shift. That way you allow it time to kick in before you have to commit to any work.

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