Modvigil 200 mg is primarily prescribed to treat sleep-related disorders that cause excessive daytime drowsiness. Doctors commonly recommend Modvigil 200 mg for narcolepsy, shift work sleep disorder, and obstructive sleep apnea to help patients stay awake and mentally alert. It works by stimulating wakefulness centers in the brain, improving focus and daily functioning. This medication is not a cure for underlying sleep conditions but helps manage symptoms effectively when used under medical supervision. Proper dosage and professional guidance are essential to ensure safety, minimize side effects, and achieve consistent therapeutic benefits for individuals living with chronic sleep disturbances.