Modalert 200 mg is mostly used to treat sleep problems. It is FDA-approved for treating narcolepsy, which causes daytime drowsiness and abrupt sleep episodes. Modafinil improves quality of life by promoting wakefulness. For obstructive sleep apnea (OSA) patients on CPAP, it reduces residual tiredness. Modafinil also treats shift work sleep disorder (SWSD), which affects non-traditional shift workers who struggle to remain awake. Modalert 200 is used off-label for ADHD, chronic fatigue syndrome, and cognitive improvement. Modalert's prescription relies on individual medical requirements and thorough examination, so visit a doctor first.