Because I just can't resist.
About nine hours after his first dose of medicine, he was feeling considerably better. This morning he woke me at five a.m. in the Simon's Cat manner, minus the baseball bat. He's clearly feeling MUCH better.
He has been playing much more since last night. He's actually running around the house, attacking doors, feet and random bits of floor. He's still terrified of the toy mice and kitten bell balls, but maybe he'll eventually mellow enough to play with them.