Adv Pharm Test 3 Study Questions Flashcards
Which H2 receptor agonist is least potent?
Cimetidine
Which H2 RA causes confusion in elderly?
Ranitidine (Zantac)
Which H2 RA is most potent?
Famotidine (Pepcid)
Best H2 RA for elderly
Famotidine (Pepcid)
Adverse effects unique to cimetidine
gynecomastia, impotence, galactorrhea
Which H2 RA is a CYP450 inhibitor?
Cimetidine
How long can pts use PPIs?
3-6 months; longer requires careful monitoring
PPI adverse effects
vitamin b deficiency
Hip fractures
Risk for infection
gastric tumors
How long does it take for PPI to work?
3-4 days
PPI MoA
binds to H+/K+ ATPase pump and irreversibly inactivates enzyme
Are PPIs prodrugs?
yes
When to take PPI?
30-60 minutes before food
Bulk forming meds MoA
absorbs water and forms bulky compound that distends colon and stimulates peristalsis
Bulk meds AE
Abdominal pain, bloating, flatulence
Bulk meds drug interactions
absorb drugs take 2 hours before or after
Surfactant dosing
once to twice a day
Surfactant full onset
1-3 days
Sufactants combined w/?
stimulants
Stimulants used often used with which pts?
those on chronic opiod therapy
Stimulant dosing
once daily
Stimulant full onset
6-12 hours
Stimulant used in combo with?
docusate
Stimulant AE
Griping, cathartic colon (years of use)
Which drug classes are used for motion sickness?
Histamine 1 antagonists, antimuscarniic and promethazine
Ondasteron indication
postoperative and chemotherapy-induced N/V
Ondasteron MOA
Blocks 5-HT3 receptor in CNS, chemoreceptor trigger zone, and GI tract
Ondasteron AE
Headache, QTc prolongation
Which Histamine1 antagonists treats vertigo?
Meclizine (Dramamine)
Side effects of motion sickness drugs?
drowsiness, xerostomia
What population to avoid with phenergan?
children under 2 (resp dep)
Phenergan routes of admin
oral, IV, suppository
Phenergan indications
motion sickness and drug induced NV
Phenergan MoA
Anticholinergic properties within the chemoreceptor trigger zone
Scopalamine route
transdermal patch
Phenergan dosing
Short acting, dosed 3 to 4 times a day
Glucocorticoid steroid MoA
inhibiting production of inflammatory cytokines and chemokines
What IBD med is used for remission?
Methotrexate
Which glucocorticoid acts locally on GI tract and has less side effects?
Budesonide
Glucocorticoid indication
During active stage of disease
Which glucorticoid is most commonly used to induce remission?
Prednisone
Hydrocortisone routes
Tablet, injection, suppositories, foam, enema
Glucocorticoid AE
Immunodeficiency – Hyperglycemia – Adrenal insufficiency – Excitatory effects (insomnia) – Increased appetite / weight gain
Methotrexate MoA
Suppresses immune system
Can methotrexate be taken during pregnancy?
No
What supplement should you take with methotrexate?
Folate
How often is methotrexate administered?
Once a week
Carbonic Anhydrase Inhibitor indications
– Glaucoma – Urinary alkalinization – Metabolic alkalosis – Acute mountain sickness
Which class of diuretics is not useful for HTN or dieresis?
Carbonic Anhydrase inhibitors
What are loop diuretics most effective for?
Fluid elimination, not HTN
Loops routes
Oral and IV
Loops MoA
– Inhibits sodium reabsorption in the ascending limb of Loop of Henle – Promotes up to 25% sodium and water excretion – Increases urinary excretion of other end
What is the most notable AE of loops?
Hypokalemia
What AE is unique to loops
Hypocalcemia
Loops AE
– Hypotension – Hyponatremia – Hypochloremia – Hypokalemia – Hypomagnesemia – Hypocalcemia – Ototoxicity – Azotemia = renal injury
Which diuretics have ceiling effect?
Loops
How are loops excreted?
Renally
Should we give more or less loops to kidney patients?
More
Which loop has lowest oral bioavailbility?
Furosemide
Thiazides MoA
– Inhibits sodium reabsorption in the distal tubule – Promotes up to 5% sodium and water excretion – Increase urinary excretion of other electrolytes
When is the effectiveness of thiazides diminished?
When CrCl falls below 30 mL/min
1st line diuretic for HTN
Thiazides
How long for max effect on blood pressure with thiazides?
2-4 weeks
Thiazides AE
– Hypotension – Hyponatremia – Hypokalemia – Hypomagnesemia – Hypercalcemia – Increased uric acid – Increased plasma glucose levels – Azotemia
Are thiazides used extensively for edema?
No
how do loops and thiazides work together?
blocks Na+ reabsorption in distal nephron segments
Potassium-Sparing Diuretics MoA
– Acts at collecting duct to inhibit sodium reabsorption
– Promotes up to 2% sodium and water excretion
– Blocks effects of aldosterone in kidney
Potassium-Sparing Diuretics AE
– Hypotension
– Nausea and vomiting, constipation, diarrhea – Hypercalcemia
– Hyperkalemia
– Gynecomastia (spironolactone)
Beta blockers MoA
– Block β1 receptors in cardiac muscle
Decrease heart rate (negative chronotropic effects)
Decrease cardiac output (negative inotropic effects)
– Inhibit the release of renin from the kidneys
– Some agents inhibit activity of the sympathetic nervous system
– Some agents directly decrease peripheral vascular resistance
Beta Blockers AE
o Hypotension
o Bronchospasm – relates to β1 selectivity!!
o Bradycardia
o Fatigue, exercise intolerance
o Depression, confusion, agitation, psychosis
Beta blockers indication
Hypertension – Angina pectoris – Myocardial infarction – Heart failure – Ventricular arrhythmia – Migraine prophylaxis – Hyperthyroidism – Glaucoma
Which beta blockers have beta selectivity?
Atenolol, metprolol
Which beta blockers have alpha blockade?
carvedilol
What does alpha blockade acheive?
decreased sympahtetic stim causing vasodilation
Decreased beta selectivity can affect which organ?
lungs
ACEI MoA
Inhibit RAAS by preventing conversion of
angiotensin I to angiotensin II → decreased systemic vascular resistance → decreased blood pressure
– Inhibit degradation of bradykinin and increase synthesis of vasodilating prostaglandins
ACEI indications
HTN
– Heart failure
– Left ventricular dysfunction – Diabetic nephropathy
– Acute myocardial infarction – Chronic kidney disease
How are most common ACEIs eliminated?
renally
ACEI AE
– Hypotension
– Hyperkalemia
– Acute renal failure – Cough
– Angioedema
ACEI interactions
Potassium supplements or potassium sparing
diuretics
ACEI contraindications
– Pregnancy, aortic stenosis, renal artery stenosis
ARB MoA
Selectively block the vasoconstrictive effects of angiotensin II by blocking binding of angiotensin II to its receptor
– Used in patients that can’t tolerate ACEI due to cough – Should probably not be use if angioedema on ACEI
ARB AE
– Hypotension
– Hyperkalemia
– Acute renal failure
– Angioedema (very rare)
ARB drug interactions
Potassium supplements or potassium sparing
diuretics
ARB contraindications
Pregnancy, aortic stenosis, renal artery stenosis
Do ACE and ARB affect cardiac outpout and blood volume?
no
Calcium channel blocker MOA
– Blocking calcium entry into smooth muscle – Results in vasodilation
– Can also affect cardiac conduction