Propofol might be a more appropriate pain reliever for some indications but the emergency room doctor will need to make that call. First responders will probably need to use the defibrillator first. Best wishes.
I have a headache? That's funny. Look at your brokerage account and tell me who has the headache. Unless you took steppen and pyrs advice and shorted you're down a good 70-80% at least. Not enough aspirin in the world.