Exam 3 Drugs Flashcards
(214 cards)
Prototype for loop diuretics
Furosemide (Lasix)
Mechanism of action of Furosemide
Acts on ascending loop of Henle to block reabsorption
Pharmacokinetics of furosemide
Rapid onset
PO: 60 min
IV: 5 min
Therapeutic uses of furosemide
Pulmonary edema
Edematous states
Hypertension
Adverse effects of furosemide
Hyponatremia, hypochloremia, dehydration
Hypotension - volume loss, relaxation of venous smooth
muscle
Hypokalemia
Ototoxicity
Hyperglycemia
Hyperuricemia
Can furosemide be used during pregnancy?
No, because it’s too risky when trying to balance fluid/electrolytes of both mom and baby
What do we have to pay particular attention to when giving furosemide? Why?
Potassium levels
We have to expect pt to lose potassium when giving furosemide, bc it’s pulling fluid out of the body
But it must stay in it’s normal range b/c if it gets too low or high, pt will have cardiac rhythm issues.
Drug interactions for furosemide
Digoxin
Ototoxic drugs
Potassium-sparing diuretics
Lithium
Antihypertensive agents
Nonsteroidal anti-inflammatory drugs
Administration of furosemide
Oral or parenteral
How should furosemide be given IV?
Must be given slowly, over at least 2 min
Giving fast can cause hearing loss
3 other types of loop diuretics
Ethacrynic acid (Edecrin)
Bumetanide (Bumex)
Torsemide (Demadex)
Another name for Thiazides and Related Diuretics
Benzothiadiazides
Effects of Thiazides and related diuretics
Similar to those of loop diuretics:
- Increase renal excretion of sodium, chloride, potassium, and water
- Elevate levels of uric acid and glucose
Differences between thiazides and loop diuretics
Diuresis is considerably lower than that produced by loop diuretics
Not effective when urine flow is scant (unlike loop diuretics)
Prototype Thiazide
Hydrochlorothiazide (HydroDIURIL)
Pharmacokinetics of hydrochlorothiazide
Peaks in 4-6 hrs
Therapeutic uses of hydrochlorothiazide
HTN
Edema
Diabetes insipidus (helps with hormonal issues from diabetes)
Adverse effects of hydrochlorothiazide
Hyponatremia, hypochloremia, and dehydration
Hypokalemia
Hyperglycemia
Hyperuricemia
Impact on lipids, calcium, and magnesium
Effect of hydrochlorothiazide on breast feeding
Enters breast milk
Drug interactions for hydrochlorothiazide
Digoxin
Augments effects of hypertensive meds
Can reduce renal excretion of lithium (leading to accumulation)
NSAIDs may blunt diuretic effect
(Can be combined with ototoxic agents without increased risk of hearing loss)
Prototype for potassium-sparing diuretics
Spironolactone (Aldactone)
Mechanism of action for Spironolactone
Blocks aldosterone in the distal nephron
Retention of potassium
Increased excretion of sodium
Therapeutic uses of spironolactone
HTN
Edematous states
Heart failure (decreased mortality in severe failure)
Primary hyperaldosteronism
Can be used for hormonal issues:
Premenstrual syndrome
Polycystic ovary syndrome
Acne in young women
Adverse effects of spironolactone
Hyperkalemia
Benign and malignant tumors
Endocrine effects