Modvigil 200 is used to treat obstructive sleep apnea, narcolepsy, and shift work sleep disorder-related insomnia. In certain cases, off-label prescriptions are made for it to treat ADHD. It has been discovered that modafinil improves a few areas of cognitive function in the lab, including attention, response time, and visuospatial ability. Nevertheless, the evidence supporting its usefulness for this purpose is conflicting, and several investigations have not shown evidence of modafinil's ability to improve cognitive performance on a number of recognized neuropsychological tests. The majority of people can handle modafinil, and there aren't many known side effects.