Renal/GU/F&E Drugs Flashcards
Oxybutynin class
antispasmodics/anticholinergics
Oxybutynin MoA
relax smooth muscle bladder; inhibits effects of acetylcholine (blocks PNS)
Oxybutynin indications
bladder spasm, overactive bladder
Oxybutynin route/dose
oral
Oxybutynin contraindications
GI obstruction, obstructive urinary tract problems (BPH), myasthenia gravis
Oxybutynin drug/drug
MANY; check drug reference before admin
Oxybutynin AE
related to blocking PNS; drowsiness, dizziness, blurred vision, tachycardia, dry mouth, nausea, urinary hesitancy, constipation, decreased sweating
Oxybutynin nursing considerations
assess urinary patterns, AE
renal functions
maintenance of volume and composition of body fluids (sodium regulation), blood pressure control (RAAS), regulation of red blood cell production (erythropoietin), regulation acid-base, electrolyte stability
diuretics general overview
MoA: act on kidneys to increase urine output
Indications: HTN, fluid overload/edema (HF, pulmonary edema, kidney/liver failure), glaucoma (decrease intra-occular pressure) hyper-kalemia (remove excess K)
diuretics general AE
GI effects: n/v/d
hypotension
dehydration (fluid volume deficit)
fluid and electrolyte disturbances- sodium and potassium
fluid rebound
fluid rebound
occurs with patients on diuretics do not take in adequate water (decrease fluid intake to decrease trips to the bathroom)
results in concentrated plasma of smaller volume
decreases volume is sensed by nephrons, which activates RAAs cycle
concentrated blood is sensed by osmotic center in brain, ADH is released to hold water and dilute the blood
results in rebound edema as fluid is retained
diuretics general contraindications
pregnancy/lactation, severe renal failure, hypotension, dehydration, drug-drug: Digoxin (increased potassium loss), Anticoags, anti-diabetic drugs (reduced effectiveness) and lithium (increased risk of toxicity)
Hydrochlorothiazide (HCTZ) class
thiazide diuretics
Hydrochlorothiazide (HCTZ) MoA
inhibits reabsorption of NaCl in distal tubule kidneys; remains in tubule for excretion (water follows Na)
Hydrochlorothiazide (HCTZ) indications
first line treatment for HTN
Hydrochlorothiazide (HCTZ) route/dose
oral
Hydrochlorothiazide (HCTZ) contraindications
allergy to sulfa drugs
Hydrochlorothiazide (HCTZ) AE
see general and photosensitivity
Hydrochlorothiazide (HCTZ) Nursing considerations
see general; use sunscreen
Furosemide (Lasix) class
loop diuretics
Furosemide (Lasix) MoA
inhibits reabsorption of NaCl in loop of Henle which causes a greater degree of diuresis than other diuretics (water follows Na)
Furosemide (Lasix) indications
conditions of fluid overload; hyperkalemia
Furosemide (Lasix) route/dose
oral, IVP (slow 20mg/min); may be given IM or as IV gtts
Furosemide (Lasix) contraindications
see general; ototoxic drugs; sulfa allergy
Furosemide (Lasix) AE
see general; hypokalemia; CNS effects: paresthesia, ototoxicity (IVP slowly)
Furosemide (Lasix) Nursing considerations
see general; potassium supplements; IV fall risk
Spironolactone class
Potassium sparing diuretic
Spironolactone MoA
aldosterone antagonist; blocks action of aldosterone in the distal tubule; loss of Na and retention of K
Spironolactone Indications
conditions of fluid overload (CHF and liver disease)
Spironolactone route/dose
oral
Spironolactone contraindications
see general
Spironolactone AE
hyperkalemia (weakness, cardiac arrhythmias, n/v/d); photosensitivity; androgen effects; impotence, hirsutism, irregular menses, gynecomastia
Spironolactone nursing considerations
see general: exceptions: monitor for high K, teach to avoid high K foods, use sunscreen
Mannitol class
osmotic diuretics
Mannitol MoA
increases osmolarity of glomerular filtrate (sugar molecule); inhibits reabsorption of water and electrolytes and increases urinary output; profound and rapid diuresis