re: Anyone ever have their kid in ambulance from school?

The good thing for you is that the school has little incentive to fight liability for the bill because they probably have a pretty big omnibus insurance policy to cover a range of shite including this. A relatively small ambulance ride is nothing compared to the gordon mckernan commercial level number that they have the policy to protect against. Maybe you should fight it? Also your school board rep might make it disappear with an email since they have some political skin in the game, if this is public school.

ETA: Your best bang for your buck is to email your school board rep, put on your best disappointed dad tone, and they will probably want to make this disappear before it gets on facebook with it. My thought... "I would never have consented to the narcotics for my kid if you had told us it would result in an unconsented ambulance ride." That way you're really arguing the narcotic instead of the ambulance ride, which they are probably more scared of a suit on the narcotics than the little ambulance bill. Then they pay the ambulance bill to make you go away and everyone is happy.