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Unit 5 Diuretics
Diuretics
| Question | Answer |
|---|---|
| Adverse Effects of all diuretics. | Renal failure, dehydration, hypotension, dizziness, GI distress (nausea, vomiting, diarrhea). |
| Contraindication for all diuretics. | Complete renal failure (Caution with renal injury). |
| Teaching points for all diuretics. | Take in morning. Monitor serum potassium levels. Careful with potassium supplements and potassium rich foods. Diabetics should monitor blood sugar more closely. Change positions slowly. Monitor weight daily. |
| 3 functions of diuretic agents. | Increase urine production. Increase sodium excretion. Block re-absorption of sodium. |
| Indications for diuretic use. | Heart failure, pulmonary edema, edema, liver disease, renal disease, hypertension, hyperkalemia. |
| Symptoms of heart failure | Tiredness/fatigue, shortness of breath/coughing, pulmonary edema, weakend pumping action of the heart, pleural effusion, swelling in the abdomen, swelling in the ankles and legs. |
| Thiazide and Thiazide-Like diuretics PROTOTYPE: | Hydrochlorothiazide (Hydro Diuril) |
| Thiazide's MOA | Hydrochlorothiazide retains sodium in the distal tubule. |
| Thiazide's Indications | Hydrochlorothiazide is indicated for hypertension and mild to moderate heart failure. |
| Thiazide's adverse effects | Hypokalemia, hyperglycemia (diabetics), hyponatremia. |
| Thiazide Contraindications/Cautions | Diabetes, Gout, hypokalemia, dehydration and kidney failure. |
| Thiazide (Hydrochlorothiazide) interactions | Digoxin. |
| Loop Diuretics PROTOTYPE: | furosemide (Lasix) |
| Loop Diuretics MOA. | furosemide (Lasix) retain sodium and chloride in the ascending loop of henle. |
| Loop Diuretics indication | furosemide (Lasix) are indicated for hypertension, heart failure and edema that is not responding to thiazides. |
| Loop diuretics adverse effects. | hypokalemia |
| Loop diuretics (furosemide, Lasix) contraindications/cautions | Hypokalemia, Gout, Dehydration, Kidney Failure |
| Loop Diuretics (furosemide, Lasix) interactions | NSAIDs (prostaglandin blocking decreases renal blood flow) Aminoglycosides Digoxin Lithium |
| Potassium-sparing diuretics PROTOTYPE: | spironolactone (Aldactone) |
| Potassium-sparing diuretics MOA | spironolactone (Aldactone) Antagonizes aldosterone causing a loss of sodium but retention of potassium in the collecting duct. |
| Potassium-sparing diuretics indication. | spironolactone (Aldactone) is indicated for patients at risk for hypokalemia. |
| Potassium-sparing diuretics adverse effects | Hyperkalemia |
| Potassium-sparing diuretics contraindications/cautions | Hyperkalemia, dehydration, kidney failure. |
| Potassium-sparing diuretics drug interactions. | ACE inhibitors, potassium supplements, NSAIDs |
| Osmotic Diuretics PROTOTYPE: | mannitol (Osmitrol) |
| Osmotic Diuretics Indications | mannitol (Osmitrol) is indicated only for intercranial pressure and sever fluid over load. It is administered only IV typically in emergent/ICU settings. |
| Osmotic Diuretics MOA | Pulls water into the proximal tubule without sodium loss, increases osmotic pressure in the tubule. |
| Osmotic Diuretics Adverse Effects | hypotension, dizziness, confusion, headache, nausea, vomiting |
| Osmotic Diuretics Contraindications/Cautions | Intracranial bleeding, Dehydration/kidney failure |