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pharm-HTN
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drug classes for hypertension
- Diuretics
- Sympathoplegics
- Vasodilators
- Angiotensin antagonists
Diuretics (hypertension)
- Chlorothiazide
- Furosemide
- Spironolactone
- Mannitol
Chlorothiazide
- diuretic drug for hypertension
- @ DCT - inhibits Na/Cl symporter --> retains Na - H2O --> excretion
- toxicity
: hypokalemia
Furosemide
- Diuretic drug for HTN
- @ loop of henle (ascending limb)
- Na/K/Cl symporter, Ca excretion -> retains ions -> H2O -> excretion
- Toxicity : hypokalemia
Spironolactone
- Diuretic drug for HTN
- @ CT – aldosterone antagonist
- Retains Na&H2O à excretion
- Toxicity: HYPERkalemia
Mannitol
- Diuretic drug for HTN
- @ loop of Henle (descending limb) –
osmotic agent
- inhibits H2O reabsorption -> excretion
- Toxicity: hyponatremia, hyperkalemia
Sympathoplegics
- Clonidine(a2 agonist)
- Reserpine
- Nicotinic R blocker
- Prazosin (a1 blocker)
- Propanolol (b1 blocker)
Clonidine
-sympathoplegic drug for HTN
-a-2 agonist
Reserpine
- sympathoplegic drug for HTN
- inhibits MA packaging and release
Propanolol
- sympathoplegic drug for HTN
- b-blocker --> heart --> inhibits contraction
Prazosin
- sympathoplegic drug for HTN
- a1 blocker --> arterioles
Vasodilators (HTN) - 3 classes
- nitrovasodilators (hydralazine)
- k-channel agonists (hyperpolarizes cell --> inhibits contraction)
- L-type Ca Channel blockers (verapamil, diltiazem, nifedipine)
Hydralazine
- vasodilator (HTN)
- inhibits GC --> relaxes vasc SM --> dec peripheral R
Angiotensin antagonists (2)
- ACEi - captopril ("-pril")
- ARB - losartan ("-tan")
Author
ekdldksk
ID
109451
Card Set
pharm-HTN
Description
hypertension drugs
Updated
2011-10-17T00:22:42Z
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