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GI Drugs
Downstate > MS2 GI Block > Drugs
138
Medical
Graduate
12/03/2010

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Cards

Term
"-tidine"
Definition
H2 blockers
Term
AE of cimetidine
Definition
reversible gynecomastia, impotence, galactorrhea; pancytopenia (low WBC count, aplastic anemia); headache, dizziness, confusion
Term
AE of H2 blockers
Definition
pancytopenia (low WBC, aplastic anemia, agranulocytes, thrombocytopenia), headache/dizziness/confusion, nausea/diarrhea, myalgia, pruritus
Term
"-azole"
Definition
PPI
Term
substituted benzimidazoles
Definition
PPI
Term
MOA of lansoprazole
Definition
irreversibly inhibits proton pump
Term
nightime AE of PPI
Definition
nocturnal acid breakthrough
Term
hypergastrinemia, bacterial overgrowth are AE of what drug?
Definition
PPI
Term
AE of MgOH
Definition
rebound secretion, diarrhea
Term
MOA of MgOH
Definition
neutralizes HCl, increases PGE and mucus secretion
Term
PPI administered IV
Definition
pantoprazole
Term
pt presents with myalgia, pruritus, and low WBC count; what drug is he taking?
Definition
H2 blocker
Term
AE of AlOH
Definition
rebound secretion, constipation
Term
AE of CaCO3 in pts with renal impairment
Definition
hypercalcemia, milk-alkali syndrome
Term
rebound secretion is AE of what drug?
Definition
antacids: AlOH, MgOH, CaCO3
Term
misoprostol is what class of drug?
Definition
PGE
Term
MOA: increases mucus and bicarbonate, inhibits histamine-stimulated HCl release by decreasing cAMP levels
Definition
prostaglandin (PGE)
Term
MOA of PGE
Definition
decreases cAMP, inhibits histamine release, inhibits HCl release; increases mucus and bicarbonate production
Term
MOA of sucralfate
Definition
binds to Hb and pepsin in ulcer and acts as barrier to acid-induced damage; increases PGE and mucus
Term
Non-absorbable sucrose analogue
Definition
Sucralfate
Term
MOA of sulcralfate?
Definition

binds to Hb and pepsin in ulcer and inhibits acid-induced damage; increases PGE and mucus

Term
MOA of bismuth subsalicylate/subcitrate
Definition
protects ulcer from further acid damage, increases mucus and PGE production, inhibits H. pylori; adsorbs pathogens, toxins
Term
protects ulcer from further acid damage, increases mucus and PGE production, inhibits H. pylori
Definition
bismuth compounds
Term
quadruple therapy combination
Definition
tetracycline, metronidazole, bismuth, H2 agonist
Term
antibiotics used for ulcer tx
Definition
MCAT: metronidazole, clarithromycine, amoxicillin, tetracycline
Term
prokinetic drugs
Definition
metoclopramide, cisapride
Term
what class of drugs are metoclopramide and cisapride?
Definition
prokinetic drugs
Term
MOA of prokinetic drugs
Definition
increases ACh release to increase gastric motility
Term
indications for prokinetic drugs
Definition
gastric hypomotility, GERD
Term
AE of cisapride
Definition
cardiotoxic, prolongs QT interval, inhibits K+ channel
Term
indications for fiber
Definition
constipation, diarrhea
Term
magnesium salts, lactulose, colyte, and golytely are what class of drugs?
Definition
osmotic laxatives
Term
MOA of sorbitol
Definition
osmotic laxative: increases osmolarity to increase secretions
Term
castor oil, senna (Ex-lax), bisacodyl are what class of drugs?
Definition
stimulant laxatives
Term
MOA of stimulant laxatives
Definition
irritates bowel to cause peristalsis
Term
AE of castor oil
Definition

cathartic colon

 

castor oil is a stimulant laxative that causes cathartic colon with long term use

Term
mineral oil, glycerin, and docusatte are what class of drugs?
Definition
stool softeners
Term
MOA of glycerin
Definition
lubricates stool making passage easier
Term
what drugs can be administered as a suppository?
Definition
glycerin, stimulant laxatives
Term
AE of dietary fiber and psyllium
Definition
flatulence
Term
MOA kaopectate
Definition
absorbent, demulcent; binds toxins, bacteria, and fluid
Term
adsorbent and demulcent
Definition
kaopectate, used for acute diarrhea
Term
loperamide, diphenoxylate, and difenoxin are what class of drugs?
Definition
opioids
Term
MOA of Imodium
Definition

Imodium = loperamide = opioid

 

Inhibits Ach release; interferes with Ca++ signal transduction to decrease Cl- secretion

tx for diarrhea

Term
AE: dizziness, headache, depression, confusion, euphoria, morphine-like effects with OD
Definition
diphenoxylate
Term
MOA of octreotide
Definition
inhibits pancreatic, gastric, and intestinal secretions; decreases motility and splanchnic blood flow
Term
indication for loperamide
Definition
acute and chronic diarrhea
Term
name 2 dopamine antagonists
Definition
prochloperazine, metoclopramide
Term
AE of phenothiazine
Definition
parkinsonism
Term
site of action of phenothiazine
Definition
CTZ
Term
MOA metoclopramide
Definition

anti-emetic: inhibits dopamine receptors in CTZ and GI

 

prokinetic: increases ACh to increase GI motility

Term
AE of metoclopramide
Definition
dystonia, Parkinsonism (inhibits dopamine), diarrhea (prokinetic), galactorrhea (increases prolactin), somnolence
Term
name a benzamide
Definition
metoclopramide
Term
MOA of scopolamine and site of action
Definition
inhibits ACh receptor in CTZ and vestibular apparatus
Term

what class of drugs are cyclizine, meclizine, dimenhydrinate, promethazine?

 

Definition
H1 blockers
Term
site of action of dimenhydrinate
Definition
CTZ and vestibular apparatus
Term
tx for motion sickness?
Definition
H1-blockers and anticholinergics
Term
site of action of serotonin antagonists
Definition
CTZ and vagus n. terminals
Term
"-setrons"
Definition
serotonin antagonists
Term
what class of drug is aprepitant?
Definition
substance P antagonist
Term
site of action of substance P (neurokinin-1) antagonist
Definition
emesis center
Term
AE: black stool, dark tongue
Definition
bismuth compounds
Term
MOA of metamucil
Definition
absorb water and ions to increase mass and water content in GI
Term
1. tx for acute diarrhea? 2. tx for chronic diarrhea?
Definition
1. bulk agents, kaopectate, peptobismol, opioids
2. opioids, somatostatin, clonidine, enkephalin, lithium salts
Term
MOA and indication for clonidine
Definition
MOA: activates alpha2-adrenergic receptors to increase absorption
indications: chronic diarrhea
Term
MOA and indication for enkephalin
Definition
MOA: activate mu and delta receptors to inhibit GI motility and increase absorption, respectively
indication: chronic diarrhea
Term
tx for motion sickness and site of action
Definition
anticholinergics (scopolamine) and H1 blockers (diphenhydramine, cyclizine, etc.); both work in CTZ and vestibular apparatus
Term
who receives hepA vaccine?
Definition
children >1yo, travelers, medical personnel, military personnel
Term
for which hep viruses do we have vaccines for?
Definition
hepA, hepB
Term
MOA of action of lamivudine, telbivudine, adefovir, tenofovir, entecavir
Definition
inhibits DNA polymerase/RT, chain terminator
Term
active form is the triphosphate form
Definition
lamivudine, telbivudine
Term
active form is the diphosphate form
Definition
adefovir
Term
indicated for lamivudine-resistant strains of hepB
Definition
adefovir, tenofovir
Term
drugs for chronic hepB
Definition
lamivudine, telbivudine, adefovir, tenofovir, entecavir
Term
tx for chronic hepC
Definition
IFN alfa-2b + ribavirin
Term
AE of telbivudine
Definition
myopathies
Term
AE of tenofovir
Definition
renal impairment, reduced bone density
Term
AE of ribavirin
Definition
10-20% hemolytic anemia (+fatigue, rash, insomnia, depression)
Term
functions of PEGylation
Definition
increases half life, decreases clearance
Term
5-ASA azo compounds
Definition
sulfasalazine, balsalazide, olsalazide
Term
indications for sulfasalazine, balsalazide, olsalazide
Definition
mild to moderate IBD
Term
time release capsule best for distribution throughout small intestine
Definition
pentasa
Term
pH sensitive drug best for absorption in terminal ileum and colon
Definition
asacol
Term
indication and administration for hydrocortisone
Definition
UC; topical, foam suppository
Term
indication and administration for budesonide
Definition
Crohn's; oral
Term
delayed therapeutic response takes weeks to months
Definition
purine analogs: 6-mercaptopurine or azathioprine
Term
AE: dose-dependent bone marrow suppression; indicated for Crohn's
Definition
methotrexate
Term
AE: alopecia, megaloblastic anemia; indicated for Crohn's
Definition
methotrexate
Term
AE: risk of URI, TB reactivation
Definition
infliximab
Term
probiotics
Definition
lactobacillus, bifidobacterium
Term
antibiotics used for Crohn's Disease
Definition
metronidazole, ciprofloxacin, clarithromycin
Term
drugs specifically indicated for Crohn's
Definition
antibiotics, probiotics; all anti-TNF drugs (adalimumab, infliximab, certolizumab pegol), budesonide and methotrexate
Term
indicated for IBS-C
Definition
tegesarod, lubiprostone
Term
MOA of dicyclomine
Definition
antispasmodic; anticholinergic; inhibits muscarinic Ach receptors in enteric plexus on smooth m.
Term
5-HT4 receptor agonist
Definition
tegesarod
Term
5-HT3 blocker
Definition
alosetron
Term
indication for alosetron
Definition
IBS-D
Term
IBS drug with cardiotoxicity
Definition
tegesarod
Term
tx for gallstones
Definition
ursodial
Term
MOA of ursodial
Definition
decreases cholesterol content and dissolves gallstones
Term
MOA of tegesarod
Definition
5-HT4 receptor agonist; increases peristalsis and Cl- secretion
Term
resistance occurs in up to 50% of patients who have been on treatment for 3 years
Definition
lamivudine
Term
tx for fistulating CD
Definition
infliximab
Term
mesalamine drugs
Definition
pentasa, asacol
Term
indicated for chronic hepB and HIV pts who are on HAART
Definition
entecavir
Term
tx for amebiasis, asymptomatic GI only
Definition
iodoquinol, paromomycin, diloxanide furoate
Term
tx for Cryptosporidium
Definition
paromomycin, nitazoxanide
Term
diloxanide furoate/paromomycin is used with metronidazole to treat what?
Definition
severe amebiasis
Term
amebiasis, severe GI
Definition
metronidazole, tinidazole
Term
metronidazole/tinidazole is tx for what?
Definition
amebiasis, severe GI only; Giardia, Balantidium coli, Trichomonas, anaerobic bacteria
Term
tx for severe and extraintestinal amebiasis
Definition
dihydroemetine
Term
tx for amebiasis; liver abscesses
Definition
chloroquine
Term
tx for Balantidium
Definition
tetracycline, metronidazole
Term
tx for Giardia
Definition
metronidazole, nitazoxanide
Term
nitazoxanide indications
Definition
Giardia, Cryptosporidium; metronidazole-resistant strains
Term
tx for Cyclospora and Isospora
Definition
TMP-SMX
Term
tx for nematodes
Definition
mebendazole, albendazole, pyrantel pamoate
Term
tx for Trichinella
Definition
mebendazole+steroids
Term
tx for Strongyloides
Definition
ivermectin, thiobendazole
Term
alternative tx to mebendazole for Ascaris
Definition
piperazine
Term
tx for trematodes
Definition
praziquantal
Term
tx for cestodes only
Definition
niclosamide
Term
which luminal amebicide acts against cysts?
Definition
iodoquinol
Term
AE: neurotoxicity, ototoxicity
Definition
paromomycin
Term
AE: dose dependent neurotoxicity
Definition
iodoquinol
Term
AE: seizures, disulfiram-like reaction, metallic taste
Definition
metronidazole
Term
AE: cardiotoxicity, hypotension
Definition
dihydroemetine
Term
AE: disulfiram-like reaction, hypertension with NE
Definition
furazolidone
Term
MOA of nitazoxanide
Definition
inhibits pyrutvate:ferrodoxin oxidoreductase pathway
Term
MOA of mebendazole
Definition
synthetic benzimidazole; depolymerizes worm microtubules
Term
MOA of piperazine
Definition
inhibits Ach
Term
MOA of pyrantel pamoate and indication
Definition
inhibits acetylcholinesterase; used for nematode infections
Term
MOA of ivermectin
Definition
opens Cl- channels and potentiates GABA-mediated inhibition
Term
MOA thiobendazole
Definition
inhibits microtubule aggregation
Term
MOA of praziquantal
Definition
increases Ca++ permeability
Term
MOA of niclosamide
Definition
uncouples worm oxidative phosphorylation
Term
AE: cysticercosis
Definition
niclosamide
Term
contraindicated for pts with iodine intolerance
Definition
iodoquinol
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