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Diuretics
IUSM
17
Pharmacology
Professional
02/13/2015

Additional Pharmacology Flashcards

 


 

Cards

Term
acetazolomaide

(Class, Mechanism, Effects, Indication, Contraindication, Adverse Effects)
Definition
Class: diuretic, carbonic anhydrase inhibitor

Mechanism: carbonic anhydrase inhibitors, acts at lumenal membrane, sulfonamide derivative; increase solute delivery to macula densa --> trigger glomerularfeedback and increases afferent arteriole resistance --> decreased GFR or RBF


Effects: decrease NaHCO3 reabsorption, produces diuresis, increase urinary pH, development of metabolic acidosis, increase K+ excretion

Indication: [weak diuretic]; glaucoma, urinary alkalization, metabolic alkalosis, acute mountain sickness

Contraindication: liver cirrhosis

Adverse Effects: acidosis, renal stones, K+ wasting, "allergy"
Term
mannitol

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, osmotic diuretic

Mechanism: increase osm of plasma and tubular fluid, marked increase in urine flow

Effects: inc osmolality of plasma (initially) and tubular fluid (after filtered); causes water retention in tubular fluid through osmotic forces in prox tubule and via reduced medullary tonicity in loop

Indication: reduce brain volume, decrease intraocular pressure; emergency setting of head trauma/brain hemorrhage/symptomatic cerebral mass; prior to neurological or ophthalmic procedures

Adverse Effects: initial hyponatremia then hypernatremia; pulmonary edema, dehydration

Pharmacokinetics: parenteral admin, pharmacological inert, freely filtered by glomerulus and not reabsorbed
Term
furosemide

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, loop diuretic

Mechanism: NKCC2 inhibitor;

Effects: increase NaCl excretion; decrease lumen-positive potential from K+ recycling; increase Ca++ and Mg++ excretion; increase K+ excretion and H+ excretion

Indication: most efficacious diuretic type; acute pulmonary edema (CHF), nephrotic and liver edema, acute hypercalcemia, hypertension, hyperkalemia, anion overdose (bromide, fluoride, iodide)

Adverse Effects: post-diuretic Na+ retention; hypokalemic metabolic alkalosis, ototoxicity (reversible), hyperuricemia, hypomagnesemia, sulfa-drug allergic rxn, hyponatremia

Pharmacokinetics: short elimination half-life; extensive ppb, secreted in proximal tubule
Term
bumetanide

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, loop diuretic

Mechanism: NKCC2 inhibitor;

Effects: increase NaCl excretion; decrease lumen-positive potential from K+ recycling; increase Ca++ and Mg++ excretion; increase K+ excretion and H+ excretion

Indication: most efficacious diuretic type; acute pulmonary edema (CHF), nephrotic and liver edema, acute hypercalcemia, hypertension, hyperkalemia, anion overdose (bromide, fluoride, iodide)

Adverse Effects: post-diuretic Na+ retention; hypokalemic metabolic alkalosis, ototoxicity (reversible), hyperuricemia, hypomagnesemia, sulfa-drug allergic rxn, hyponatremia

Pharmacokinetics: short elimination half-life; extensive ppb, secreted in proximal tubule
Term
torsemide

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, loop diuretic

Mechanism: NKCC2 inhibitor;

Effects: increase NaCl excretion; decrease lumen-positive potential from K+ recycling; increase Ca++ and Mg++ excretion; increase K+ excretion and H+ excretion

Indication: most efficacious diuretic type; acute pulmonary edema (CHF), nephrotic and liver edema, acute hypercalcemia, hypertension, hyperkalemia, anion overdose (bromide, fluoride, iodide)

Adverse Effects: post-diuretic Na+ retention; hypokalemic metabolic alkalosis, ototoxicity (reversible), hyperuricemia, hypomagnesemia, sulfa-drug allergic rxn, hyponatremia

Pharmacokinetics: short elimination half-life; extensive ppb, secreted in proximal tubule
Term
ethacrynic acid

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, loop diuretic

Mechanism: NKCC2 inhibitor;

Effects: increase NaCl excretion; decrease lumen-positive potential from K+ recycling; increase Ca++ and Mg++ excretion; increase K+ excretion and H+ excretion

Indication: most efficacious diuretic type; acute pulmonary edema (CHF), nephrotic and liver edema, acute hypercalcemia, hypertension, hyperkalemia, anion overdose (bromide, fluoride, iodide)

Adverse Effects: post-diuretic Na+ retention; hypokalemic metabolic alkalosis, ototoxicity (reversible), hyperuricemia, hypomagnesemia, hyponatremia

Pharmacokinetics: short elimination half-life; extensive ppb, secreted in proximal tubule
Term
hydrochlorothiazide

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, distal tube diuretic (thiazide)

Mechanism: NCC inhibitors, moderately effective, act at lumenal membrane,

Effect: increase NaCl excretion, enhance Ca++ reabsorption, increase K+ and H+ excretion

Indications: hypertension (1st line), edema (assoc. w/ heart, liver and renal diseases), nephrogenic diabetes insipidus, nephrolithiasis, ?osteoporosis?

Adverse Effects: hypokalemic metabolic alkalosis, hyperuricemia, hypomagnesemia, hypercalcemia, sulfa-drug allergic rxn, hyponatremia, hyperglycemia, hyperlipidemia

Pharmacokinetics: variable ppb, proximal tubule secretion via organic acid secretory, range of half-lives
Term
chlorthalidone

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, distal tube diuretic (thiazide)

Mechanism: NCC inhibitors, moderately effective, act at lumenal membrane,

Effect: increase NaCl excretion, enhance Ca++ reabsorption, increase K+ and H+ excretion

Indications: hypertension (1st line), edema (assoc. w/ heart, liver and renal diseases), nephrogenic diabetes insipidus, nephrolithiasis, ?osteoporosis?

Adverse Effects: hypokalemic metabolic alkalosis, hyperuricemia, hypomagnesemia, hypercalcemia, sulfa-drug allergic rxn, hyponatremia, hyperglycemia, hyperlipidemia

Pharmacokinetics: variable ppb, proximal tubule secretion via organic acid secretory, range of half-lives
Term
metolazone

(Class, Mechanism, Effects, Indication, Adverse Effects, Pharmacokinetics)
Definition
Class: diuretic, distal tube diuretic (thiazide)

Mechanism: NCC inhibitors, moderately effective, act at lumenal membrane,

Effect: increase NaCl excretion, enhance Ca++ reabsorption, increase K+ and H+ excretion

Indications: hypertension (1st line), edema (assoc. w/ heart, liver and renal diseases), nephrogenic diabetes insipidus, nephrolithiasis, ?osteoporosis?

Adverse Effects: hypokalemic metabolic alkalosis, hyperuricemia, hypomagnesemia, hypercalcemia, sulfa-drug allergic rxn, hyponatremia, hyperglycemia, hyperlipidemia

Pharmacokinetics: variable ppb, proximal tubule secretion via organic acid secretory, range of half-lives
Term
amiloride

(Class, Mechanism, Effects, Indication, Adverse Effects)
Definition
Class: diuretic, K+ sparing, Na+ ch. inhibitor

Mechanism: ENaC inhibitor in collecting tubule

Effects: decrease Na+ influx, decrease transepithelial potential difference, decrease K+ and H+ excretion

Indication: [seldom as sole agent, combo w/ loop and distal tubule diuretics]; HTN

Adverse Effects: hyperkalemia (esp. in renal failure, ACE-I, K+ supplements), metabolic acidosis
Term
triamterine

(Class, Mechanism, Effects, Indication, Adverse Effects)
Definition
Class: diuretic, K+ sparing, Na+ ch. inhibitor

Mechanism: ENaC inhibitor in collecting tubule

Effects: decrease Na+ influx, decrease transepithelial potential difference, decrease K+ and H+ excretion

Indication: [seldom as sole agent, combo w/ loop and distal tubule diuretics]; HTN

Adverse Effects: hyperkalemia (esp. in renal failure, ACE-I, K+ supplements), metabolic acidosis, ACUTE RENAL FAILE, KIDNEY STONES
Term
spironolactone (diuretic)

(Class, Mechanism, Effects, Indication, Adverse Effects)
Definition
Class: diuretic, K+ sparing, ALD antagonist

Mechanism: antagonize ALD at receptors in collecting duct

Effect: decrease Na+ influx, decrease transepithelial potential difference, decrease K+ and H+ excretion

Indication: [seldom as sole agent, combo w/ loop or distal tubule diuretic]; hyperaldosteronism, mineralcorticoid excess, HEPATIC CIRRHOSIS, HEART FAILURE

Adverse Effects: hyperkalemia (esp. in renal failure, ACE-I, K+ supplements), metabolic acidosis, gynecosmastia, impotence, menstrual irregularities; (activity at prostaglandin and androgen receptors)
Term
eplerenone

(Class, Mechanism, Effects, Indication, Adverse Effects)
Definition
Class: diuretic, K+ sparing, ALD antagonist

Mechanism: antagonize ALD at receptors in collecting duct

Effect: decrease Na+ influx, decrease transepithelial potential difference, decrease K+ and H+ excretion

Indication: [seldom as sole agent, combo w/ loop or distal tubule diuretic]; hyperaldosteronism, mineralcorticoid excess, HEPATIC CIRRHOSIS, HEART FAILURE

Adverse Effects: hyperkalemia (esp. in renal failure, ACE-I, K+ supplements), metabolic acidosis; (no activity at androgen/prostaglandin receptors); SUPER EXPENSIVE
Term
desmopressin

(Class, Mechanism, Effect, Indication, Adverse Effects, Drug Interactions, Pharmacokinetics)
Definition
Class: vasopressin agonist

Mechanism: V2 (ADH receptor) selective agonist

Effect: increase insertion of aquaporins collectin tubule membrane, increase retention of water

Indication: central diabetes insipidus, coagulopathy in hemophilia A and von Willebrand's disease

Adverse Effects: hyponatremia, vasoconstriction

Drug interactions: decrease diuresis with lithium and demeclocycline

Pharmacokinetics: longer-half life than endogenous ligand, oral and nasal preps have limited bioavail,
Term
conivaptan

(Class, Mechanism, Effects, Indication, Adverse Effect, Drug Interactions)
Definition
Class: vasopressin antagonist

Mechanism: V1 and V2 (ADH receptor) antagonist, IV only

Effects: decrease aquaporin presence in collecting tubules, decrease water retention

Indication: ADH excess - CHF or SIADH

Adverse Effects: hypernatremia, nephrogenic diabetes insipidus, renal failure w/ demeclocyline

Drug interactions: lithium and domeclocycline reduce cAMP production by ADH and interfere with actions of cAMP
Term
tolvaptan

(Class, Mechanism, Effects, Indication, Adverse Effect, Drug Interactions)
Definition
Class: vasopressin antagonist

Mechanism: V2 (ADH receptor) antagonist, ORAL

Effects: decrease aquaporin presence in collecting tubules, decrease water retention

Indication:[USE ONLY WHEN CAN MONITOR SERUM SODIUM]; ADH excess - CHF or SIADH

Adverse Effects: POTENTIAL IRREVERSIBLE LIVER FAILURE; hypernatremia, nephrogenic diabetes insipidus, renal failure w/ demeclocyline

Drug interactions: lithium and domeclocycline reduce cAMP production by ADH and interfere with actions of cAMP
Term
demeclocycline

(Class, Mechanism, Effects, Indication, Adverse Effect, Drug Interactions)
Definition
Class: vasopressin antagonist

Mechanism: (ADH receptor) antagonist,

Effects: decrease aquaporin presence in collecting tubules, decrease water retention

Indication: ADH excess - CHF or SIADH

Adverse Effects: lots; hypernatremia, nephrogenic diabetes insipidus, renal failure w/ demeclocyline

Drug interactions: lithium and domeclocycline reduce cAMP production by ADH and interfere with actions of cAMP
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