Lowering Blood Pressure

Decrease Renin

inhibit renin action

Aliskiren (Tekturna)

r

renin inhibitor

decrease renin release

Beta Blockers

eg, Propranolol

CNS Adrenolytics

eg. Clonidine, Methyldopa

Mineralocorticoids

Agonists

r

in combo with glucocorticoids, are used as replacement in adrenal insufficiency

Fludrocortisone

r

DoC, oral

Deoxycorticosterone acetate (DOCA)

r

IV or IM in oil

K-sparing diuretics

Competitive Antagonists

Spironolactone

binds to mineralocorticoids, androgen, AND progestin receptors

Eplerenone

much more specific mineralocorticoid antag

Physiologic Antagonists

Triamterene

Amiloride

also std of care for diabetic nehpropathy

decrease AT II production

PDP/ACE Inhibitors

r

Use for:HTN (decr vasoconstriction) - esp diabetic nephropathy <--ACE or ARBCHF (incr vasodilation)<-- ACE are DoCPost MI <-- ACE are DoCanginal pain, ischemic eventsall are renal sparing, so they do not increase transglomerular pressure

Captopril

r

MOA: blocks conversion of AT I -> AT II and increases activity of bradykinin (which breaks down vasodilators to inactive peptides)(1) decreases production of vasoconstrictors (AT II)(2) decreases destruction of vasodilators (bradykinin)oralhas sulfhydrl grouprenal-sparing (doesn't increase transglomerular pressure)will effectively decrease both AT 1 & AT 2 receptor activityfood reduces bioavailabilty by 25%

AE:

hyperkalemia

r

b/c it reduces aldosterone secretion, so you're not spilling as much K+

hypogustia (loss of taste)

non-productive cough

r

b/c increased bradykinin stimulates the cough reflex

proteinuria

neutropenia

rash (hypersensitivity)

hypoglycemia

increased renin and AT I production

drug interactions

w/ triamterene or amiloride

hyperkalemia

renal sparing

does not increase transglomerular pressure

r

which would lead to glomerular damage

Enalapril

r

MOA: same as captopril

AE

no hypogustia

advantages:

No sulfhydryl group so fewer AEs

r

has carboxyl group instead

IV admin

qd dosing

bioavailability not affected by food

renal sparing

does not increase transglomerular pressure

r

which would lead to glomerular damage

Lisinopril

advantages

qd dosing

bioavailability not affected by food

renal sparing

does not increase transglomerular pressure

r

which would lead to glomerular damage

reduce AT II action

ARB's (AT Receptor Blockers)

Losartan Potassium

r

MOA: blocks binding of AT II to AT-1 receptors*more efficacious in reducing the action of AT IIactions:inhib contraction of vascular smooth muscledecr catecholamine releasedecr aldosterone biosynthesisdecr thirstdecr ADHdecr AT II mediated changes in renal fxn (ie decr Na retention)decr cellular hypertrophy and hyperplasia

AE:

dizziness

hyperkalemia

NO COUGH!

available in combo with HCTZ

Hyzaar

Valsartan

r

MOA: blocks binding of AT II to AT-1 receptors (same as losartan K)

available in combo with HCTZ

Diovan HCT

food markedly decreases absorbtion