We recommend that you wait until the numbness has subsided before eating anything that requires you to chew. Though the filling is ready for use immediately, we recommend waiting to eat as it reduces the chance of biting your tongue, cheek, or lips unknowingly. You can drink using a straw on the opposite side of the mouth that was worked on. If you are hungry and need some calories before the numbness wears off, it is okay to drink a smoothie, shake, etc. We also recommend refraining from drinking anything hot as one could burn themselves and not know it due to being numb.