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Details

GI drugs
Antibiotics, PPI, H2, cytoprotectants, PGE agonist
25
Medical
Post-Graduate
02/16/2013

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Cards

Term
#1 Triple therapy H-pylori
Definition
Clarithromycin, amoxicillin, omeprazole

SKIN RASH NOT ALWAYS ALLERGY to amoxicillin

peripheral neuropathy, disulfiram reaction to alcohol

Clarithro may cause GI upset
Term
H-pylori therapy allergic penicillin
Definition
Clarithromycin, metroniadazol, ompeprazol
Term
quadruple therapy H-pylori
Definition
Metronidazol, tetracylin, omeprazole, bismuth subsalicate

Tetracylin may be hepatoxic and effect bone structure
Term
Omeprazole
Definition
Proton pump inhibitor

absorbed in the small intestine, secreted into acid caniliculus, converted to OM-sulfonemide, blocks H/K-ATPase

COVALENT AND IRREVERSIBLE!!!!!

remember proton pumps move into lumen in response to meal therefore TAKE 30-60 MINS PRIOR EATING

METABOLIZED AND INHIBITS CYP2C19!! GENETIC DEFICIENCY MAY BE PRESENT

INCREASES RESPIRATORY INFECTION AND DECREASES B12 + potential rebound hypersecretion

may inhibit ketoconazol and digoxin absorbtion

CLOPIDOGREL ALSO CYP2c19 THEREFORE MAY CAUSE BUILDUP
Term
Ranitidine
Definition
Zantac - H2 receptor antagonist
OK 1 large dose/day

Confusion, depression, hallucinations in elderly
Hepatic and renal excretion
Term
Cimetidine
Definition
H2 receptor antagonist
ok 1 large dose/day

hepatic and renal secretion
Confusion, depression, hallucinations in elderly

Inhibits some CYp450's

ANTI-ANDROGENETIC
Term
Antacids
Definition
simple buffer
Mg++ causes diarrhea then CNS
Al+++ causes constipation and hypophosphotemia
Na+ = sodium retention
CO3 --> CO2 plus gas
HCO3 --> systemic alkylosis
Ca2+ --> calcium supplement
Term
BISMUTH SUBSALICYLATE
Definition
cytoprotective agent
may stimulate pge

causes black tongue or black feces
salicylate allergy
Term
sucralfate
Definition
In acidic pH, forms viscous, paste-like layer protecting
mucosal cells. STIMULATED PGE PRODUCTION

PPI reduce efficacy

SAFE IN PREGNANCY
CONTAINS ALUMINUM
Term
misprostol
Definition
Synthetic PGE which stimulated bicarb and mucous secretion

ABORTIFACTIVE

least effective except for NSAID USE
Term
Sulfasalazine
Definition
is a prodrug – converted to mesalamine
(5ASA) & sulfapyridine by bacteria

does NOT act like aspirin via COX acetylation
Inhibits the synthesis of inflammatory mediators such as IL-1, TNF-a, NF-κB as well as inhibition of
lipoxygenase pathway and scavenging of free radicals.

works as colonic enema

Adverse Effects: Primarily from sulfapyridine breakdown product (Stevens Johnson syndrome)

SAFE PREGNANCY
Term
Balsalazide
Definition
does NOT act like aspirin via COX acetylation
Inhibits the synthesis of inflammatory mediators such as IL-1, TNF-a, NF-κB as well as inhibition of
lipoxygenase pathway and scavenging of free radicals.

SAFE PREGNANCY
Term
olsalazine
Definition
does NOT act like aspirin via COX acetylation
Inhibits the synthesis of inflammatory mediators such as IL-1, TNF-a, NF-κB as well as inhibition of
lipoxygenase pathway and scavenging of free radicals.

works in colon

SAFE PREGNANCY
Term
mesalamine
Definition
does NOT act like aspirin via COX acetylation
Inhibits the synthesis of inflammatory mediators such as IL-1, TNF-a, NF-κB as well as inhibition of
lipoxygenase pathway and scavenging of free radicals.

best with slow release pharmacokinetics

SAFE PREGNANCY
Term
Aprepitant
Definition
NK1 Antagonists –
blocks the neurokinin receptor for substance P

ANTIEMETIC
Term
scopolamine
Definition
anti-muscarinic for motion sickness
Term
Metoclopramide
Definition
mixed antagonist/agonist
D2/5-HT3 Antagonist, M agonist

antiemetic AND prokinetic

Parkinson-like,
acute dystonic reactions, extrapyramidal reactions
Term
dronabinol
Definition
THC GI appetite drug
Term
Poly ethylene glycol
Definition
osmotic laxitive (purgative)
Term
lactulose
Definition
osmotic laxitive
Term
psyllium
Definition
softening of feces, act in 1-3 days (low dose osmotic)
Term
Loperamide
Definition
opioid anti-diarrheal (doesnt cross BBB)

BEST IBS + DIARHHEA
Term
Senna
Definition
purgative laxitive plant
Term
Dicyclomine
Definition
antimuscarinic anti-diarrheal
Term
probiotics
Definition
lactobaccilus
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