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Phenacetin
Renal papillary necrosis
Inhibit COX with no inflammatory effect
MOA of paracetamol
500mg every 4 hours
Therapeutic dose of paracetamol in adults
10-25mg/kg/dose
Paracetamol therapeutic dose in children
4g/day
Toxic dose of paracetamol
15g/day
Lethal dose of paracetamol
Sulfation
Good metabolite of paracetamol
Glucuronidation
Nontoxic metabolite of paracetamol
Oxidation
Paracetamol pathway, toxic metabolire
NAPQI (N-acetylparabenzoquinomeimine)
Paracetamol is metabolized by CYP2E1.
Glutathione
Turns NAPQI to nontoxic
N-acetylcysteine
Target NAPQI to turn it into nontoxic