He knows Raju well enough by now to anticipate his reaction to the doctor's orders. He'll follow them, absolutely, but he'll be reluctant to leave him the entire time. He can't give him one of those patented reassuring nods, but he can catch him as he walks by with a pat to his shoulder.

This has something to do with the painkillers. It's not a large logical leap to make. "What would you like to know?"