Pain mgmt non opioid focused pharm lecture Flashcards
(88 cards)
acetaminophen MOA
not well understood
- blocks prostaglandin release
- raises pain threshold
- not anti-inflammatory
- analgesic, antipyretic
regular strength APAP dose
325-650 mg
q4-6 hours prn pain
extra strength APAP dose
1000 mg
q6 hr prn pain
Max daily dose APAP
4g otherwise OD! (adults)
kids 5 doses of 50-75 mg/kg max
3 main things to education pts about with tylenol
- liver warning
- alcoholic bev not recommended (esp. 3+ drinks)
- watch out combo products
alcoholics and APAP
dose lower assume already have some liver damage
APAP is metabolixed to
NAPQI (n-acetyle etc..)
how does viral illness impact APAP metablosims
increased risk toxicity if dehydrated
early sx APAP OD
N/V
AMS
metabolic acidosis
increased PT/INR (liver damage)
stage 1 APAP toxicity
asymptomatic
LFT normal
N/V, diaphoretic, pallor, malaise etc
stage 2 APAP tox
AST over 1000
RUQ pain
increased PT, bilirubin, sCr, BUN
proteinuria, hematuria, casts
stage 3 APAP tox
-max liver injury 72-96 hr post ingestion
-coma
-high ammonia level
-fatal 3-5 days post APAP OD
multiorgan failure
stage 4 APAP OD
recovery hepatic regeneration days to wks
APAP OD suspect first step?
- rumack matthew nomogram
- for acute OD in pt over 12
- estimate level of toxicity
- use w/in 4-24 hrs
- above line need NAC
NAC must be given w/in ___hrs of APAP OD
8
NAC adminstered
IV or oral
less ADR with oral
NSAIDS block __ enzymes
COX enzymes
COX enzymes do what
create prostaglandins
what do prostaglandins do
- released creating pain, inflammation, and pyretic properties
- induce uterine contractions with labor
- maintain renal blood flow (chronic NSAID use RF for renal ischemia AKI)
why no NSAID third trimester of pregnancy?
- can cause premature closure PDA
- impact placenta detachment
what is best pain reliever for post marathon pain?
APAP
- NSAID will block inflammatory response of muscle repair process, and will compromise blood flow to kidneys risk of renal ischemia
t/f enteric coated NSIADS should not be taken with milk or antacids
true
T/F nsaids take with food
yes decrease GI ADR
those that are on chronic NSAID what think about?
- GI Risk ulcers, dyspepsia, bleeds
- rx: PPIs to reduce risk