Buy Modalert 200 Australia is a wakefulness-promoting medication that is used to treat narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It's also used as a cognitive enhancer off-label. The specific mechanism of Modalert is unknown, although it alters multiple neurotransmitter systems in the brain. Some studies suggest it may help healthy people perform better on challenging tasks. However, no long-term trials have been done to see if it reduces cognitive decline or dementia. Most people find this medicine to be safe, with moderate side effects including headaches, nausea, dizziness, sleeplessness, and anxiety.