It works by affecting certain substances that exist in the brain and control the sleep and wake cycle. Armodafinil chemical present in Waklert increases the amount of a chemical that is used by the nerves as a medium to communicate with each other. This chemical isDopamine and it acts as a neurotransmitter. By increasing this chemical in the brain, the reuptake of dopamine into nervesis lowered. Armodafinil drug is found to produce psychoactive and euphoric effects, feelings typical of other CNS stimulants and alterations in perception, mood, thinking in humans.