Generally with spinal injuries, or neurosurgery, if a
patient is looking at back surgery
Flexeril (muscle relaxers) and Vicodin (pain killers) are the main medications used to help with the pain.
If he has chopped the pills up, then he's most likely NOT abusing them. The reason I say this is because he would be taking several pills WHOLE. He probably took one and realized he was really sensitive to them, so cut them up so he could take a smaller dose so he would not be so tired.