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53 Cards in this Set

  • Front
  • Back
2 major pathways that arachidonic acid enters?
lipoxygenase
cyclo-oxygenase
lipoxygenase produces?
leukotrienes (LTB4, LTC4/B4/E4)
cyclo-oxygenase produces?
prostaglandins
thromboxane
prostacyclin
COX1?
housekeeping enzyme, present in most cells
COX2?
only in setting of inflammation
NSAIDs major differences from narcotic analgesics?
1.lower maximal effect
2.no addiction
3.free of CNS effects
mechanism of NSAIDs?
inhibition of PG biosynthesis by COX1 and COX2
therapeutic uses of NSAIDs?
analgesic
antipyretic
anti-inflammatory
primary dysmenorrhea
patent ductus arteriosus
colon cancer
side effects of NSAIDs?
GI ulceration and intolerance;
blockade of platelet aggregation;
inhibition of uterine motility;
inhibition of PG-mediated renal effects;
hypersensitivity reaction
characteristics of hypersensivity reactions to NSAIDs?
asthmatic attacks;
urticaria;
angioedema;
cross reactivity to all aspirin-like drugs
warning on package insert of NSAIDs?
GI toxicity such as bleeding, ulcer, and perforation
misoprostol?
synthetic PGE1 analog given with NSAIDs to protect GI mucosa;
side effect is diarrhea
given with NSAIDs to protect GI mucosa?
misoprostol
advantage in terms of side effects of selective COX2 inhibitors?
no gastric ulceration and intolerance; no inhibition of platelet function
aspirin mechanism of action and importance?
irreversible acetylation of cyclooxygenase;
platelet effects persist for lifetime of platelet (8-10 days) - surgical considerations
early, reversible warning of aspirin toxicity?
tinnitus or deafness
aspirin intoxication?
disturbance of acid-base balance (resp alkalosis followed by metabolic acidosis);
salicylism: headache, dizziness, tinnitus, mental confusion, drowsiness, sweating
contraindications for aspirin?
ulcer
asthma
gout
influenza (Reye's syndrome)
diflunisal?
antiinflammatory potency >aspirin;
not given for analgesic or antipyretic;
less auditory side effects
mesalamine?
salicylate;
used for local effect in IBD
acetaminophen?
analgesic and antipyretic, weak anti-inflammatory
adverse effect of acetaminophen?
fatal hepatic necrosis
antidote to acetaminophen toxicity?
mucomyst (N-acetylcysteine)
mucomyst (N-acetylcysteine)?
antidote to acetaminophen toxicity
justification for giving N-acetylcysteine for acetaminophen toxicity?
gives body more cysteine to make more glutathione to process toxic intermediates to a safer metabolite that can be excreted
what condition increases risk of acetaminophen toxicity and why?
chronic alcoholism;
induction of p450 enzyme that processes acetaminophen to a toxic intermediate
therapeutic uses of indomethacin?
acute gout and ankylosing spondylitis;
patent ductus arteriosus in premature infants
adverse effects of indomethacin?
GI: nausea, vomiting, anorexia, abdominal pain;
CNS: severe frontal headache (15-25%), may be associated with dizziness, confusion, depression
sulindac?
prodrug NSAID;
less ulcerogenic potential, GI irritation, and blood loss are less severe than aspirin
therapeutic uses of tolmetin?
JRA
not gout
diclofenac mechanism?
reduce synthesis of both PG and leukotrienes
toxic effects of diclofenac?
GI
hepatotoxicity
1st injectable NSAID?
ketorolac
ketorolac indications?
short-term (<5 days) managment of moderately severe acute pain that requires analgesia at the opioid level, usually in a postoperative setting
naproxen advantage over aspirin?
less GI irritation but 20x more potent than aspirin
ketoprofen mechanism of action?
inhibits both cyclooxygenases and lipoxygenase
oxaprozin?
long half life (40-60 hrs) resulting in increased patient compliance
piroxicam mechanism?
potent reversible inhibitor of cyclooxygenase
piroxican half life and consequence?
extended half-life (50-60 hrs) with steady state concentration reached at 7-12 days
meloxicam mechanism?
preferentially inhibit COX2 over COX1
only nonacid NSAID?
nabumetone
nabumetone?
nonacid NSAID;
ketone prodrug;
preferentially inhibits COX2 (at low dose)
only COX2 selective inhibitor still on market?
celecoxib
celecoxib?
COX2 selective inhibitor resulting in fewer ulcers and no effect on platelet aggregation or prothrombin time
why was rofecoxib (vioxx) removed from the market?
cardiovascular event
indications for disease modifying antirheumatic drugs?
patients who are refractory to therapeutic regimens of NSAIDs
associated with fatal infusion reactions?
rituximab
abatacept mechanism and administration method?
inhibit T cell activation;
IV injection
rituximab mechanism and administration method?
chimeric monoclonal antibody specific to the antigen CD20 B lymphocytes
etanercept mechanism and administration method?
bind to TNF and block interaction with cell surface TNF receptors;
SC
adalimumab mechanism, administration method, and half life?
bind to TNF-α and block interaction with p55 and p75 cell surface TNF receptors;
SC;
half life = 10-20 days
infliximab mechanism and administration method?
binds to soluble and membrane-bound TNF-α and inhibits binding of TNF-α with its receptors;
IV
Other disease modifying antirheumatic drugs?
methotrexate and other immunosuppressive drugs;
antimalarial drugs (chloroquine, hydroxychloroquine);
sulfaxalazine;
penicillamine;
gold