Buy Modafinil 200mg online is a central nervous system stimulant used to treat excessive daytime sleepiness caused by conditions like narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It works by increasing dopamine levels in the brain, helping you stay awake and focused. Taken once daily as prescribed, modafinil improves alertness without causing sudden energy crashes. However, it should not be stopped abruptly without a doctor’s advice.