I’ve always used 2 sprays @25mcg and usually later in the day I would top it up with 1 more spray of 25mcg. It seems to be working as long as I have it on as I can tell from my targets when Im talking, if the eye contact drops then I top it up thats when I know somethings changed or wrong, when I have p93 on you can gage your targets they look at you differently then normal as if your not there sometimes or they sometimes dont look you directly in your eyes more like your nose or mouth normal people just look away without p93 with p93 they are still focused on your face but they move around your face quite abit quite erratic. But no more then 3 sprays of 25mcg a day.