Modalert acts on neurotransmitters in the brain—mainly dopamine—to increase alertness and reduce the urge to sleep. Unlike traditional stimulants such as caffeine or amphetamines, modafinil has a smoother, more focused effect without the jitteriness or crash.
It typically starts working within 30 to 60 minutes and can last up to 10–12 hours, depending on the individual. https://modalertaustralia.com/modalert-100-mg/