Can you? yes, i mean it's physically possible but why would
pre-workout be called "pre" workout if your taking it after your
work out ?
It would just be foolish to do that because the pre workout
wouldn't do anything for you. you would just be getting energized
after your already done working out there would be no point.
take your pre workout supplement 10 minutes before you work out
and take your post workout protein/supplement within thirty minutes
after your workout. I recommend taking your post workout A.S.A.P.
after your workout.