yep its fine, i mix my creatine, glutamine and protein togeather. i dont know what you make your protein shakes with but if its anything acidic (orange juice, limonade, etc) don't put your creatine in it for durations of time (5min or longer) because the acid will break it down and it'll be less effective. i would recomend mixing your post-workout shake with water only... it'll get to your starving muscles much faster than if mixed with milk... just some extra tips
