Well, hopefully, you're not eating food or ingesting a protein shake then going right to a workout. That's like swimming right after eating...a no no.
Being that you should be fueling your body throughout the day with 5 to 6 balanced meals, you will always be consuming food/protein prior to a workout and you most definitely need to eat food or drink protein within 60-90 minutes afterwards. Make sure you are waiting at least two hours before working out after a food meal, or about an hour after a protein shake. This will give your time to digest the majority of it.
Either way, follow chucky's advice. The same advice he seems to give everyone. Eat, eat, eat for growth, maintenance and sustenance.