DERS Drugs Flashcards
AlOH
Antacid
AE: Constipation
MgOH
Antacid
AE: Osmotic diarrhea
Calcium Carbonate
Antacid
AE: Belching, metabolic alkalosis (milk alkali)
Cimetidine
H2 Receptor Antagonist
Prototype with many AEs
AE: Gynecomastia, galactorrhea, male impotence, confusion, dizziness, headaches, CYP450 inhibition.
Inc serum concentration of Warfarin, Diazepam, Phenytoin.
Famotidine
H2 Receptor Antagonist
AE: B12 deficiency and myelosuppression with long term use.
Nizatidine
H2 Receptor Antagonist
AE: B12 deficiency and myelosuppression with long term use.
Famotidine
H2 Receptor Antagonist
AE: B12 deficiency and myelosuppression with long-term use.
Omeprazole
Proton Pump Inhibitors
AE: Diarrhea, abdominal pain, headache, Vit B12 deficiency, hypomagnesemia, osteopenia, inc risk of C Diff colitis, CYP450 inhibitor, CYP2C19 Inhibitor.
Inc serum concentration of Warfarin, Diazepam, Phenytoin, decrease effectiveness of Clopidogrel.
Esomeprazole
Proton Pump Inhibitors
AE: Diarrhea, abdominal pain, headache, Vit B12 deficiency, hypomagnesemia, osteopenia, inc risk of C Diff colitis, CYP2C19 Inhibitor.
Decrease effectiveness of Clopidogrel.
Lansoprazole
Proton Pump Inhibitors
AE: Diarrhea, abdominal pain, headache, Vit B12 deficiency, hypomagnesemia, osteopenia, inc risk of C Diff colitis, CYP2C19 Inhibitor.
Decrease effectiveness of Clopidogrel.
Pantoprazole
Proton Pump Inhibitors
AE: Diarrhea, abdominal pain, headache, Vit B12 deficiency, hypomagnesemia, osteopenia, inc risk of C Diff colitis.
Minimal inhibition of CYP2C19. Preferred in pt taking Clopidogrel.
Rabeprazole
Proton Pump Inhibitors
AE: Diarrhea, abdominal pain, headache, Vit B12 deficiency, hypomagnesemia, osteopenia, inc risk of C Diff colitis.
Minimal inhibition of CYP2C19. Preferred in pt taking Clopidogrel.
Misoprostol
PGE1 Analog
PUD treatment.
Bings EP3 receptor, decreases acid secretion, increases mucus and bicarb secretion.
Treat NSAID-induced ulcers.
Pregnancy: Widely used to treat post-partum hemorrhage. Abortifacient in combination with mifepristone. Can be used for cervical ripening but not FDA approved for this.
AE: Diarrhea, abdominal pain, cramps.
CI in pregnancy.
Sucralfate
PUD treatment.
Sucrose salt + Sulfated AlOH
Paste that binds to ulcers. Initial management of GERD in pregnancy.
Bismuth Subsalicylate
Suppress H Pylori, neutralize gastric acid, treat dyspepsia & acute diarrhea. Decrease fluid secretion in enteric tract. Anti-diarrheal and anti-acid.
AE: Harmless blackening of stool. Salicylate poisoning in combination with other salicylate products.
CI: Renal failure.
Erythromycin
Prokinetic
Antibiotic, agonist at motilin receptor.
Indication: Diabetic gastroparesis.
Use limited to short term.
Cisapride
Prokinetic
5HT4 agonist, 5HT3 antagonist. Direct muscle stimulant.
Used for GERD, gastroparesis.
No longer available due to causing ventricular arrhythmia.
Metoclopramide
Prokinetic
5HT4 agonist. Vagal + central 5HT3 antagonist. D2 antagonist in upper digestive tract.
Indication: Gastroparesis, Anti-emetic, GERD.
AE: Extrapyramidal syndrome, galactorrhea.
Scopolamine
Antimuscarinic antiemetic
Treat postop N/V and motion sickness.
Diphenhydramine
H1 Antagonist antiemetic
Treat postop N/V and motion sickness.
Meclizine
H1 Antagonist antiemetic
Treat postop N/V and motion sickness.
Cyclizine
H1 Antagonist antiemetic
Treat postop N/V and motion sickness.
Promethazine
Weak D2 antagonist at chemotaxic zone. Antiemetic.
Treat CINV
Droperidol
Central D2 antagonist. Anti-emetic.
AE: Extrapyramidal syndrome, QT prolongation.
Ondansetron
5-HT3 Antagonist (prototype). Anti-emetic
DOC for prophylaxis of acute CINV. Effective against hyperemesis gravidarum. Well tolerated.
Granisetron
5-HTS Antagonist. Anti-emetic
DOC for prophylaxis of acute CINV. Effective against hyperemesis gravidarum. Well tolerated.
Dexamethasone
Anti-emetic: Effective adjuvants against nausea in metastatic cancer. Suppress peritumoral inflammation & prostaglandin production.
Acute adrenal insufficiency: Dexamethasone given to treat if AAI is suspected but not yet diagnosed. Allows for immediate treatment that doesn’t impede diagnostic cortisol assays.
Methylprednisolone
Anti-emetic: Effective adjuvants against nausea in metastatic cancer. Suppress peritumoral inflammation & prostaglandin production.
Aprepitant
NK1 antagonist ORAL. Anti-emetic
Prophylaxis against delayed CINV.
Extensive CYP3A4 metabolism- affect metabolism of warfarin and OCP
Fosaprepitant
NK1 antagonist PARENTERAL. Anti-emetic.
Prophylaxis against delayed CINV.
Extensive CYP3A4 metabolism- affect metabolism of warfarin and OCP
Benzodiazepines
Lorazepam, Alprazolam, Diazepam. Anti-emetics.
Anti-anxiety adjuncts. Facilitate GABA action.
AE: CNS depression, addiction.
Dronabinol
Delta-9-tetrahydrocannabinol. Anti-emetic.
Stimulates CB1 receptors.
Prophylaxis in patients with chemo when other drugs ineffective.
AE: Palpitations, Hypotension, Tachycardia, Vasodilation, Conjunctival injection.
Methylcellulose
Bulk-forming laxative
Non-digestible colloid, absorbs water, forms a bulky jelly that distends colon and promotes peristalsis.
CI: Immobile pt or on long-term opioids.
Psyllium
Bulk-forming laxative
Non-digestible colloid, absorbs water, forms a bulky jelly that distends colon and promotes peristalsis.
Use: Constipation predominant IBS.
CI: Immobile pt or on long-term opioids.
Bran
Bulk-forming laxative
Non-digestible colloid, absorbs water, forms a bulky jelly that distends colon and promotes peristalsis.
CI: Immobile pt or on long-term opioids.
Bisacodyl
Stimulant laxative
Directly stimulates enteric NS to increase motility.
Minimal systemic absorption, safe for acute & long-term use.
Senna
Stimulant laxative
Directly stimulates enteric NS to increase motility.
Melanosis coli with chronic use- harmless brown pigmentation of colonic mucosa.
Castor oil
Stimulant laxative. Broken down into ricinoleic acid in SI.
Directly stimulates enteric NS to increase motility.
Required on a long-term basis for neurologically impaired and bed-bound patients.
CI: Pregnancy (stimulates contraction)
Docusate
Stool softener. Laxative
Surfactant that allows water and lipids to penetrate and soften stool.
Use: Constipation predominant IBS
Glycerin
Stool softener. Laxative
Surfactant that allows water and lipids to penetrate and soften stool.
Mineral Oil
Lubricant Laxative
Coats fecal material, preventing water reabsorption.
CI: Docusate will negate action of mineral oil by absorbing it into the stool (can’t coat stool)
Lactulose
Osmotic Laxative
AE: Flatus with abdominal cramping
Magnesium Salts
Osmotic Laxative
MgOH and MgSO4
CI: Prolonged use in pt with renal insufficiency can cause hypermagnesemia
Polyethylene Glycol
Osmotic Laxative
No systemic absorption, high osmotic pressure. No flatus or cramping.
Use: Complete bowel prep before GI endoscopy. Management of chronic constipation. Constipation predominant IBS.
Lubiprostone
Laxative
Stimulates Cl channels in SI
Use: Chronic constipation, IBS with predominant constipation.
AE: Diarrhea
CI: Children
Alvimopan
Laxative
Selective mu-opioid receptor antagonist
Do not cross BBB
Methylnaltrexone
Laxative
Selective mu-opioid receptor antagonist
Do not cross BBB
Loperamide
Antidiarrheal Opioid Agonist.
Presynaptic mu-opioid receptors inhibit ACh release and decrease gut peristalsis.
Doesn’t cross BBB- no analgesic properties or addiction potential.
Use: Diarrhea predominant IBS
CI: Children, severe colitis.
Diphenoxylate
Antidiarrheal Opioid Agonist
Presynaptic mu-opioid receptors inhibit ACh release and decrease gut peristalsis.
Can cross BBB- high prolonged doses can cause opioid dependence.
CI: Children, severe colitis.
Octreotide
Somatostatin Analog
Synthetic Octapeptide with longer half-life.
Antidiarrheal: Treat diarrhea due to neuroendocrine tumors, vagotomy, short bowel syndrome, dumping syndrome, AIDS.
AE: Reduce pancreatic exocrine function –> steatorrhea, fat-soluble vitamin deficiency. Reduce gallbladder contractility –> gallstones.
Alosetron
Afferent 5-HT3 antagonist. Anti-diarrheal.
Reduce noxious visceral sensations such as bloating, nausea, pain
Use: Diarrhea predominant IBS.
Hyoscyamine
Anticholinergic antidiarrheal
Anti-spasmodic affects on GI tract. Limited to short term relief of acute diarrhea due to unpleasant side effects from cholinergic blockade.
Used in Diarrhea predominant IBS