Modafinil 400 mg refers to a higher daily amount of modafinil, a prescription wakefulness-promoting medicine used for excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work disorder. Modafinil affects brain mechanisms involved in wakefulness and is intended to help improve daytime alertness in people with specific sleep-related conditions. ... https://www.armodafinil.com.au/product/modafinil-400mg