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Pharmacology
Diuretics
12
Medical
Graduate
03/02/2010

Additional Medical Flashcards

 


 

Cards

Term
Loop diuretics
Definition

-semide ending

high ceiling diuretic

Inhibition of Na/2Cl/K cotransporter at thick ascending loop of Henle

causes smooth muscle relaxation

GFR and RPF unchanged

Term
Side effects of loop diuretics
Definition
  • low K, Cl, Mg (give Mg)
  • cardiac arrhythmias
  • low Ca (used as treatment for hypercalcemia
  • high uric acid (competitive inhibition of PSOASS, which removes uric acid)
  • high glucose, high TGs, low HDL, high pH (alkalosis --> hypokalemia)
  • ototoxicity (cochlear>vestibular), increased with aminoglycosides and cisplatin
Term
Colchicine
Definition

treatment of gout

microtubule inhibition

Term
IV Use of Loop Diuretics
Definition

acute renal failure

pulmonary edema

increased intracranial pressure

increased intraocular pressure/glaucoma

Term
Oral Use of Loop Diuretics
Definition

increased bp (if thiazides don't work)

cardiac insufficiency

renal insufficiency

Term
Thiazides
Definition

low ceiling diuretic

-thiazide ending

Inhibition of Na/Cl cotransport in early distal tubule, secreted actively (like loops)

increases urine volume modestly, but decreased in DI

Term
Side effects of thiazides
Definition

increased uric acid

decreased carbonic anhydrase

decreased GFR and RPF

do not use in ARF, no IV

low K, Mg, Cl

high plasma Ca, low urine Ca

increase glucose, TG, low HDL

Term
Oral uses of thiazides
Definition

increased bp

cardiac insufficiency and edema

diabetes insipidus

urinary Ca stones

 

combine with potassium sparing drug: aldosterone antagonists, cycloamidine derivatives

Term
Potassium Sparing Drugs
Definition

aldosterone antagonists (eg spironolactone)

and

cycloamidine derivatives (eg triamterene, which depletes folic acid)

 

not diuretic use on their own

Term
Do Not Combine
Definition

spironolactone + cycloamidine

ACE + any K sparing

K supplements + ACE or any K sparing

 

due to danger of hyperkalemia

Term
Carboanhydrase inhibitors
Definition

acetazolamide

secreted into tubule(?), inhibits CA in early proximal tubule

 

rare use as diuretic, mainly used to maintain pH, induces acidosis in blood (and alkalosis in urine)

 

used for prevention of mountain sickness, glaucoma, sequential nephron blockade

Term
Xanthine derivatives
Definition

caffeine, theophylline, theobromine

 

at low [], adenosine-1 receptor blocker, which causes vasoconstriction of the efferent kidney arteriole

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