Diuretics

Question 2

What are diuretics?

Answer 2

Drugs that increase urine output

Diuretics are used to manage conditions like hypertension and edema.

Question 3

Name the types of diuretics.

Answer 3

• Carbonic Anhydrase Inhibitors
• Osmotic Diuretics
• Loop Diuretics
• Thiazide Diuretics
• K+ Sparing Diuretics

Each type has different mechanisms and clinical uses.

Question 4

What hormone systems regulate sodium levels?

Answer 4

• Renin-angiotensin-aldosterone
• Antidiuretic hormone (ADH)

These systems help maintain sodium balance and fluid retention.

Question 5

True or false: Any drug that increases Na excretion leads to volume loss.

Answer 5

TRUE

Increased sodium excretion typically results in increased urine output.

Question 6

What is the effect of most diuretics on potassium levels?

Answer 6

Lead to hypokalemia

Most diuretics increase potassium excretion, which can lead to low potassium levels.

Question 7

What is the main clinical use of Acetazolamide?

Answer 7

• Severe metabolic alkalosis
• Glaucoma
• Pseudotumor cerebri
• Prevention of high altitude sickness

Acetazolamide works by inhibiting carbonic anhydrase.

Question 8

What are the side effects of Carbonic Anhydrase Inhibitors?

Answer 8

• Metabolic acidosis
• Paresthesias
• Kidney stones

These side effects are due to altered bicarbonate handling.

Question 9

What is Mannitol used for?

Answer 9

• Cerebral edema
• Glaucoma

Mannitol creates a hyperosmolar state to draw fluid out of tissues.

Question 10

What are the loop diuretics mentioned?

Answer 10

• Furosemide
• Bumetanide
• Torsemide
• Ethacrynic acid

Loop diuretics inhibit the Na-K-2Cl pump in the kidney.

Question 11

What are the potential side effects of loop diuretics?

Answer 11

• Hypokalemia
• Hypocalcemia
• Ototoxicity
• Acute interstitial nephritis

These effects can result from the strong diuretic action.

Question 12

What is the mechanism of thiazide diuretics?

Answer 12

Inhibit Na reabsorption in the distal convoluted tubule

Thiazides are often used for hypertension and calcium kidney stones.

Question 13

What are the clinical uses of thiazide diuretics?

Answer 13

• Hypertension
• Recurrent calcium kidney stones
• Osteoporosis
• Diabetes insipidus

Thiazides help manage fluid balance and calcium levels.

Question 14

What is the effect of K-sparing diuretics on potassium levels?

Answer 14

Spare potassium

Unlike other diuretics, K-sparing diuretics do not increase potassium excretion.

Question 15

What are the side effects of Spironolactone?

Answer 15

• Gynecomastia
• Hyperkalemia

Spironolactone blocks testosterone effects and can lead to elevated potassium levels.

Question 16

What is the RAA system?

Answer 16

Renin-Angiotensin-Aldosterone system

This system is activated in response to volume loss and regulates sodium and water reabsorption.

Question 17

What is contraction alkalosis?

Answer 17

Metabolic alkalosis due to volume contraction

Seen with loop diuretics and thiazides.

Question 18

What is the effect of thiazides on calcium levels?

Answer 18

Hypercalcemia

Thiazides can increase calcium reabsorption in the kidneys.

Question 19

What is the effect of loop diuretics on calcium levels?

Answer 19

Hypocalcemia

Loop diuretics promote calcium excretion.