gi meds Flashcards
promethazine, prochlorperazine MOA
phenothiazines
phenothiazines AEs
sedation, hTN, EPS, QT prolongation
promethazine - extravasation (admin slow!)
ondansetron, granisetron, palnosetron MOA
serotonin-3 receptor antagonist
serotonin-3 receptor antagonist AEs
QT prolongation
fosaprepitant MOA
substance P/neurokinin 1 antagonist
hydroxyzine, meclizine, dimenhydrinate MOA
h-1 receptor antagonist
histamine-1 receptor antagonist AEs
anticholinergic
scopolamine MOA
muscarinic receptor antagonist
scopolamine AEs
anticholinergic
scopolamine AEs
anticholinergic
loperamide, diphenoxylate/atropine, opium tincture MOA
antipropulsives
antipropulsives AEs
loperamide - consitpation, toxic megacolon
diphenosylate/atropine - anticholinergic AE, abuse potential
tincture - constipation, confusion, sedation, urinary retention, dependence, miosis
who is tegasterod approved for?
women <65 due to risk of serious CV events
for IBS-c
what are tegaserod and prucalopride used for?
IBS-C
lubprostone MOA
chloride channel activator
lubiprostone AE
diarrhea
linaclotide, plecanatide MOA
guanlyate cyclase receptor agonist
used for IBS-C
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alosetron MOA
serotonin-3 receptor antagonist
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dicyclomine, hyoscyamine, glycopyrrolate MOA
muscarinic receptor antagonist
metoclopramide MOA
dopamine-2 receptor antagonist
what is metoclopramide used for?
gastroparesis
alvimopan, naloxegol, methylnaltrexone, naldemedine MOA
mu receptor antagonist
mu receptor antagonist AE
abd pain, diarrhea, opioid withdrawal
alvimopan - MI - hospital admin only
polycarbophil, psyllium MOA
bulk-forming laxative
senna, bisacodyl MOA
stimulant laxative
laxatives AE
abd pain, bloating/cramping, GI obstruction, electrolyte disturbance, diarrhrea
lactulose, polyethylene glucol, mag hydroxide, mag citrate MOA
osmotic laxatives
antacid components AE
calcium - constipation, hyperCa
mag - diarrhea, hypermag
carbonate - eructation
alumninum - constipation, hyperaluminemia, hypophosphatemia
sodium - fluid retention
famotidine, cimetidine, nizatadine MOA
H2 receptor antagonist
H2 receptor antagonist AE
sedation, thrombocytopenia, confusion
cimetidine - gynecomastia, decreased libido, impotence
esomeprazole, dexlansoprazole, pantoprazole,, omeprazole, lansoprazole, rebeprazole MOA
PPI
PPI AEs
c. diff, pneumonia, hypomag, B12 deficiency, iron deficiency, fractures
take w food (except dexlansoprazole)
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GERD step up therapy
mild & intermittent
H2 antagonist PRN
H2 angagonist BID
Low dose PPI QD
PPI QD
GERD step down therapy
severe or frequent GERD
PPI QD
low dose PPI QD
BID H2 antagonist
PRN H2 antagonist
GERD tx considerations
not for long term tx except:
Barrett’s esophagus
severe erosive esophagitis
symptomatic GERD following PPI withdrawal
common causes of PUD
h. pylori infection
NSAIDS (COX-1 inhibition)
critical illness
PUD therapy principles
discontinue NSAID
evaluate need for aspirin
treat H. pylori
give PPI!!!
uncomplicated - QD
complicated/H. pylori - BID
H. pylori treatment
PPI BID & abx
amoxicillin & clarithromycin (resistance) x14d + PPI
bismuth subsalicylate, tetracycline, metronidazole + PPI
post op N/V prevention
high risk - prophylaxis w 3 antiemetics from different classes
moderate risk - 2 antiemetics from different classes
low risk - depends on anesthesia (inhalation/total IV - dexamethasone + ondansetron)
CINV acute emesis occurs
within 1-2 h of chemo
CINV delayed emesis occurs
occurs >24h after chemo
3 categories with highest therapeutic index for mgmt of CINV
5-hydroxytryptamine receptor antagonist
neurokinin-1 receptor antagonists
glucocorticoids (dexamethasone)
tx of highly emetogenic regimens
4 days tx
day 1 - NK1RA + 5HT2 + dexameth + olanzapine
day 2-4: dexameth + olanzapine
tx of moderately emetogenic regimen
day 1 - NK1RA + 5-HT3RA + dexameth
day 2-3: 5-HT3 RA + dexameth
low emetogenic regimen
day 1 - 5-HT3RA or dexameth
chronic constipation tx
dietary fiber/ bulk forming laxatives
polyethylene glycol, senna, biscodyl
opioid induced consitpation tx
stimulant or osmotic laxative
bulk-forming laxative
lubiprostone or peripheral mu receptor antagonist
IBS-C tx
bulk forming laxative (psyllium)/soluble fiber
polyethylene glycol
libiprostone, linaclotide, plecanatide
IBS-D tx
loperamide
bile acid sequesterants
aldosetrol
IBS-D PRN meds
for abd pain/bloating
dicyclomine, glycopyrollate, hyoscyamine
IBD med classes
5-aminosalicylate derivative glucocorticoids immunosuppressants TNFA inhibitors a-4 integrin antagonist interleukin antagonists
most commonly used agent for IBD
mesalamine
sulfasalazine AE
rash, folic acid deficiency, bone marrow suprression, SJS
what is lubiprostone used for?
IBS-C and opioid induced constipation
what are linaclotide and plecanatide used for?
IBS-C
diphenoxylate MOA
structurally similar to meperidine, inhibits GI motility and slows GI propulsion
muscarinic receptor antagonist least likely to cross the BBB
glycoyrrolate
what med should not be give IV?
hydroxyzine, AEs through other routes
serotonin-3 receptor antagonist with the longest half life and highest receptor selectivity
palonosetron
misoprostol MOA
PGE1 analog - stimulates mucin and bicarb secretion
used for GERD/PUD