Modalert 200 mg is a brand of modafinil, a prescription medication used to promote wakefulness in people with certain sleep disorders, such as narcolepsy. It helps reduce excessive daytime sleepiness and improve alertness. People researching Modalert 200 mg should verify the product's authenticity and follow local prescription requirements when obtaining medication. Possible side effects include headache, nausea, anxiety, and difficulty sleeping. Rarely, modafinil can cause serious skin reactions. Consult a qualified healthcare professional before use, as it may interact with other medications and may not be suitable for everyone.