Modalert 200 mg works by stimulating the central nervous system, specifically targeting the brain's neurotransmitters. It contains the active ingredient modafinil, which promotes wakefulness and alertness. Modalert 200 mg is commonly used to treat excessive daytime sleepiness associated with sleep disorders such as narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It works by increasing the levels of certain chemicals in the brain that regulate sleep and wakefulness. Modalert 200 mg should be taken orally, usually once a day in the morning or as directed by a healthcare professional. It is important to follow the prescribed dosage and not exceed the recommended amount. The effects of Modalert 200 mg can last for several hours, helping individuals stay awake and focused throughout the day. It is important to note that Modalert 200 mg is a prescription medication and should only be used under the guidance of a healthcare professional.