Adult: 300 - 400mg PO, may repeat 4-6 hours, max 1200mg/day
Ped: 10mg/kg PO, may repeat 6 hours, max 40mg/kg/day
x hypersensitivity/ allergy to IBP or NSAIDs
x active GI bleeding or ulcers 
x pregnancy
3mL self administered via inhaler, may repeat in 20min, max 6mL
x under 18
x pregnant/ intended/ breastfeeding
x inadequate understanding/ cooperation 
x decreased LOR or head injury 
x kidneys - failure or impairment 
x liver dysfunction following exposure to halogenated anaesthetics 
x tetracycline antibiotics 
x personal/ genetic hx of malignant hyperthermia 
x muscular dystrophy
x hypersensitivity/ allergy to acetaminophen 
x severe alcoholic hepatitis or liver dysfunction with active alcohol consumption 
x acute liver injury 
x acetaminophen induced liver disease
adult: 500-1000mg (15mg/kg, max 1000mg/ dose, max 3000mg/ day) 
ped: <30kg: 15mg/kg 
30 - 50kg: 500 mg 
>50kg: 500 - 1000mg
