Artvigil 150 mg Tablet contains the active ingredient Armodafinil, which functions as a wakefulness-promoting agent. It primarily works by influencing certain neurotransmitters in the brain, particularly dopamine, by inhibiting its reuptake, thereby increasing its availability in the synaptic cleft. This mechanism enhances alertness and reduces excessive sleepiness associated with narcolepsy, obstructive sleep apnea, and shift work sleep disorder.