Vincent, eventually finds a room marked as pharmacy. There might be more than one for all he knows, but no one seems to be around this one, so he'll try it first. It's locked and so he gets his kit of little things that he's picked up along the years to try and pick the lock. Of course, he's still listening for people, but he does have to concentrate on hearing the lock to possibly unlock the door and get in, so he might not be paying as much attention as he should be.