Misc. Flashcards
drugs contraindicated in renal dysfunction
CrCl <60: nitrofurantoin
CrCl <50: Stribild, voriconazole
CrCl <30: bisphosphonats, dabigatran, duloxetine, genvoya, fondaparinux, NSAIDs, K-sparing diuretics, rivaroxaban, tadalafil, tramadol ER
GFR <30: genvoya, SGLT2 inhibitors (canagliflozin, etc), metformin
Hepatitis A
acute, self-limiting
fecal-oral transmission via contaminated food/water
Hepatitis B
acute/chronic causes infection, cirrhosis, liver failure, death
spread via blood, body fluids
Hepatitis C
spread via blood, body fluids
tx: direct acting antiretrovirals
Direct Acting Antiretrovirals
Harvoni (sofosbuvir + ledipasvir) - avoid PPIs, H2RAs
Epclusa (sofosbuvir + velpatasvir) - avoid PPIs, H2RAs
Vosevi (sofos + velpat + voxilaprevir) - take w/ food, avoid PPIs, H2RAs
Mavyret (glecaprevir + pibrentasvir) - 8 week course, all others x12 weeks
all DAAs c/i w/ 3A4 inducers, most inc conc. of statins, myopathy
GERD initial and maintenance therapy
initial: PPI once daily x8 weeks
maintenance: PPI, H2RA
lifestyle mods: weight loss, raise head of bed, avoid eating before bed, avoid triggers
Antacids for GERD
neutralize gastric acid, raise pH not absorbed relief in minutes, lasts 30-60 minutes calcium carbonate (Tums) magnesium (Phillips, milk of magnesia) Mg + (Al or Ca) combo (Mylanta) Mg + Al + simethicone (Maalox)
H2RAs for GERD
reversibly inhibit H2 receptors, decrease gastric acid secretion
famotidine (Pepcid)
ranitidine (Zantac)
s/e: confusion, cognitive impairment in elderly
PPIs for GERD
bind gastric H/K-ATPase pump, blocks gastric acid secretion
use lowest effective dose for maintenance
esomeprazole (Nexium), omeprazole (Prilosec), lansoprazole (Prevacid), pantoprazole (Protonix), dexlansoprazole (Dexilant)
s/e: osteoporosis, fractures, C. diff, diarrhea, hypomagnesemia
decrease efficacy of clopiogrel, absorption of other drugs
GERD other treatments
metoclopramide (Reglan)
s/e: tardive dyskinesia, EPS, restlessness, fatigue, drowsiness
avoid in Parkinson’s
Peptic Ulcer Disease
causes: H. pylori, NSAID-induced, stress-induced
s/sx: dyspepsia, gastric pain in mid/upper stomach
eating lessens pain if H. pylori ulcer
eating worsens pain if NSIAD ulcer
treatment of H. pylori ulcers
first line - quadruple therapy x10-14d (PPI BID or esomeprazole daily + Pepto + metronidazole + tetracycline
triple therapy if no prior exposure to macrolides: PPI/esomeprazole + amoxicillin + clarithromycin
treatment of NSAID ulcers
celecoxib or other COX2 selectives - meloxicam, nabumetone, diclofenac, etodolac
cytoprotective drugs protect ulcer from further damage - misoprostol (Cytotec), sucralafate (Carafate)
constipation treatment special cases
use fiber in pregnancy
stimulant laxative for opioid-induced constipation (senna, bisacodyl)
bulk forming laxatives
psyllium (metamucil)
calcium polycarbophil (FiberCon)
methylcelluose (Citrucel)
take 2 hrs before/after other drugs
osmotic laxatives
magnesium hydroxide (Milk of Magnesia) PEG (Miralax) glycerin (pedia-lax, suppositories) sorbitol, lactulose s/e: electrolyte imbalance
stimulant laxatives
senna (Ex-lax, Senokot)
bisacodyl (Dulcolax)
other laxatives
emollient - docusate (Colace) lubiprostone (Amitiza) linaclotide (Linzess) plecanatide (Trulance) alvimopan (Entereg)
diarrhea
mainly viral, E. coli bacteria
replace fluids, electrolytes
non-infectious = Pepto or loperamide
IBS-D = loperamide, rifaximin (Xifaxin), alosetron (Lotronex - women only)
antidiarrheals
bismuth subsalicylate (Pepto)
loperamide (Imodium)
diphenoxylate-atropine (Lomotil)
antispasmodics for diarrhea
dicyclomine (Bentyl)
anticholinergic - dry mouth, nausea, blurred vision
Mu-opioid receptor agonists for diarrhea
eluxadoline (Viberzi)
antidiarrheal counseling
do not give Pepto to kids/teens w/ viral infection - risk of Reye’s syndrome
do not self treat w/ imodium for >48 hrs
treatment of IBD
short courses of oral/IV steroids for acute exacerbations, aminosalicylates for maintenance, budesonide if confined to ileum or proximal colon
induction of remission for Chron’s, Colitis
Chron’s: steroids +/- thiopurine or methotrexate; anti-TNF +/- thiopurine; interleukin receptor antagonist
Colitis: steroids +/- 5-ASA or thiopurine; anti-TNF +/- thiopurine; cyclosporine
maintenance of remission of Chron’s
mild: budesonide
mod/severe: Anti-TNF (Humira, Remicade, Cimzia), thiopurine (azathioprine, mercaptopurine), methotrexate, IL antagonist (uztekinumab - Stelara)
maintenance of remission of Colitis
mild: mesalamine (5-ASA)
mod/severe: anti-TNF (Humira, Remicade), golimumab (Symponi), thiopurine (azathioprine, mercaptopurine), cyclosporine
steroids for IBD
prednisone (Deltasone)
budesonide (Entocort, Uceris)
aminosalicylates for IBS
indicated for treatment of Colitis mesalamine sulfasalazine basalazide osalazine
thiopurines for IBS
azathioprine
mercaptopurine