Anesthesia Pharmacology: Antihypertensive Drugs Practice
Questions
Click on the correct answer.
Promotes hyperosmolar diuresis; acts in the distal tubule to decrease sodium absorption; promotes calcium reabsorption
mannitol (Osmitrol)
furosemide (Lasix)
chlorothiazide (Diuril)
triamterene (Dyrenium)
acetazolamide (Diamox)
Adverse effect(s) associated with thiazide diuretic use:
gout
potassium depletion
both
neither
Example(s) of "high-ceiling" diuretic(s):
triamterene (Dyrenium)
spironolactone (Aldactone)
bumetanide (Bumex)
amiloride (Midamor)
chlorothiazide (Diuril)
Adverse effect(s) associated with loop diuretics:
potassium depletion
ototoxicity
gout
A & C
A, B & C
Clinical use(s) of clonidine:
analgesic
antihypertensive
both
neither
Neuraxial use of clonidine: -- mechanism of analgesia
interaction with the opioid u receptor
activation of postsynaptic alpha2 receptors in the spinal cord substantia gelatinosa
both
neither
Side effects associated with clonidine use as an epidural/subarachnoid space analgesic:
nausea
vomiting
delayed gastric emptying
pruritus
none of the above
Use of preanesthetic clonidine (Catapres):
reduces intraoperative blood-pressure and heart rate lability
increases anesthetic requirements for inhaled and injected agents
increases likelihood of reflex tachycardia caused by direct laryngoscopy for tracheal intubation
increases circulating plasma epinephrine levels
none of the above
Antihypertensive drug effect inhibited by imipramine (Tofranil) or cocaine:
metoprolol (Lopressor)
propranolol (Inderal)
guanethidine (Ismelin)
verapamil (Isoptin, Calan)
triamterene (Dyrenium)
Adrenergic antagonist but with intrinsic sympathomimetic effect at beta2 adrenergic receptors:
metoprolol (Lopressor)
esmolol (Brevibloc)
timolol (Blocadren)
labetalol (Trandate, Normodyne)
physostigmine (Antilirium)
Adverse effects associated with labetalol:
orthostatic hypotension
urinary retention
bronchospasm
paresthesias
all of the above
Cardiovascular effects of chronic prazosin administration:
causes reflex mediated tachycardia
causes an increase in plasma renin
higher affinity for venular alpha receptors compared to arteriolar alpha receptors
impairs renal blood flow
no effect on plasma lipids
Adverse effects associated with prazosin:
initial-dose marked orthostatic hypotension
dry mouth
sexual dysfunction
A & C
A, B & C
Combination of prazosin (Minipress) and beta-blocker
administration may result in a potentially nearly refractory hypotension during regional anesthesia: