Modalert 100 Online is a prescription medication used to treat excessive sleepiness caused by conditions such as narcolepsy, shift work sleep disorder, and obstructive sleep apnea. Its active ingredient, modafinil, is a wakefulness-promoting agent that works by affecting certain neurotransmitters in the brain, helping to improve alertness and reduce fatigue.

Modalert 100 is typically taken once daily, either in the morning or before a work shift, depending on the condition being treated. The medication can help individuals stay awake and focused for up to 8-12 hours.