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APAP toxicity
Pharmacology
12
Medical
Professional
03/07/2012

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Cards

Term
metabolism of APAP
Definition
first order kinetics
Term
mech of action for apap
Definition
weak anti inflamm
weak inhib of COX
Anti inflamm only at high dose
Term
benefit of apap
Definition
No gastric irritant
No effect on platelet coag
Term
how is apap metabolized
Definition
90% glucuronidation and sulfation
5% CYP450 to NAPQI
Term
children w/toxicity to apap
Definition
they have more sulfation capacity making them less predisposed to toxicity
Term
how does long term use of ethanol exacerbate apap toxicity? Short term?
Definition
induces CYP2E1

decreases toxicity by reducing NAPQI
Term
Phase 1 of apap toxicity
Definition
max 24 hours
nausea, vomiting
asymptomatic
Term
phase 2 toxicity
Definition
1-3 days
abdominal tenderness
clotting factors may be altered
renal involvement
Term
phase 3 toxicity
Definition
3-9 days
hepatic injury
death from multi organ failure
Term
Phase 4 toxicity
Definition
4-14 days
resolution of liver failure and lack of liver fibrosis
Term
traditional treatment protocol in US
Definition
72 hour regimen of oral NAC
Term
Other aspects of treatment overdose
Definition
activated charcoal
anti emetic therapy
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