Doctors typically prescribe Modalert 200 (Modafinil) to treat conditions related to excessive daytime sleepiness. It is most commonly used for narcolepsy, a condition that causes overwhelming daytime sleepiness and sudden sleep attacks. Modalert 200 buy online is also prescribed for obstructive sleep apnea (OSA) to help patients stay awake during the day despite disrupted sleep patterns caused by nighttime breathing cessation. Additionally, it is used for shift work sleep disorder (SWSD), which affects people who work irregular hours, such as B. Night shifts, leading to sleep disturbances and fatigue. Although it is not officially approved for other uses, some doctors may prescribe Modalert off-label for conditions such as ADHD or to improve cognitive performance in certain patients. However, it is important to use this medication only under a doctor’s supervision to avoid side effects or misuse.