No. Usually people ask this question because they have experienced a sleep drug before and felt drowsiness as a side effect. Sleep medications work by reducing activity in certain areas of the brain usually associated with cognition. This can make one feel slow and lethargic. However Rejuvii is not a drug nor does it work like one. Rejuvii prepares your mind for rest and rejuvenation by decreasing stress hormone levels and increasing specific neurotransmitter levels make it easier for the brain to engage in it’s repair processes.