when you take something during your workout, even swallowing water, it will slow you down believe it or not. that is why you see runners gargle and spit water during a race. you don't want anything in your body during a workout
now some advanced pro's will take shit during a workout.. milos sarcev will inject insulin, amino acids, and nutrients.. the guy is nuts and you aren't in his league so don't worry about all that
just sip some water during your workout