Yes, Modalert 200 mg tablets have shown effectiveness in treating shift work sleep disorder (SWSD). SWSD is a condition that affects individuals who work non-traditional hours, such as night shifts or rotating shifts, causing disruptions in their sleep-wake cycle. By promoting wakefulness and alertness during work hours, Artvigil helps individuals with SWSD maintain optimal performance and reduce the risks associated with sleepiness, such as accidents or errors. It is important to consult with a healthcare professional to determine the appropriate dosage and usage guidelines for Modalert 200 mg in the context of shift work sleep disorder.