Pharmacology Flashcards
Hypertensive drugs that are safe in pregnancy
Hydralazine, labetalol, methyldopa, nifedipine
Hypertensive drugs that at protective against diabetic nephropathy
ACE inhibitors and ARBs
Hypertensive drugs used with diabetes mellitus
ACE inhibitors/ARBs, CCBs, thiazide diuretics, B-blockers
Hypertensive drugs used in HF
Diuretics (spironolactone)
ACE inhibitors/ARBs
B-blockers (compensated HF)
Aldosterone antagonist
Hypertensive drug contraindicated in decompensated HF and cardiogenic shock
B-blockers
Primary hypertensive drugs
Thiazide diuretics
ACE inhibitors/ARBs
Dihydropyridine CCBs
Hypertensive drug that should be avoided in renal artery stenosis
Thiazide diuretics
CCBs that act on the heart
Non-dihydropyridines: dilitiazem and verapamil
CCBs that act on vascular smooth muscle
CANNN: Clevidipine Amlodipine Nifedipine Nimodipine Nicardipine
Dihydropyridine CCB not indicated for HTN
Nimodipine
Indicated for HTN, angina, and Raynaud phenomenon
Dihydropyridine CCBs (except nimodipine)
CCBs best for vascular smooth muscle
Amlodipine = nifedipine > dilitiazem > verapamil
CCBs best for heart
Verapamil > dilitiazem > amlodipine = nifedipine
CCBs MOA
Block voltage gated L-type Ca channels of cardiac and smooth muscle cells decreasing muscle contractility
CCB indicated for subarachnoid hemorrhage
Nimodipine - prevents cerebral vasospasms
CCB indicated for hypertensive urgency or emergency
Nicardipine and clevidipine
CCB indicated for HTN, angina, and atrial fibrillation/flutter
Non-dihydropyridines verapamil and diltiazem
CCBs that cause cardiac depression, AV block, hyperprolactinemia, constipation
Non-dihydropyridines
CCBs that cause peripheral edema, flushing, dizziness, gingival hyperplasia
Dihydropyridines
Hypertensive used for severe HTN, HF with organic nitrate and safe to used during pregnancy
Hydralazine
Frequently co-administered with hydralazine to prevent reflex tachycardia
B-blocker
When is hydralazine contraindicated
Angina and CAD
Hypertensive that causes compensatory tachycardia, fluid retention, headache, angina, Lupus-like syndrome
Hydralazine
D1 receptor agonist used for hypertensive emergency
Fenoldopam
B-blocker used for hypertensive emergency
Labetolol
CCB blocker used for hypertensive emergency
Clevidipine and Nicardipine
Nitrite used for hypertensive emergency
Nitroprusside
D1 receptor agonist used in hypertensive emergency that causes coronary, peripheral, renal, and splanchnic vasodilation
Fenoldopam
Antihypertensive used postoperatively that can cause hypotension and tachycardia as side effects
Fenoldopam
Short-acting antihypertensive that increases cGMP via direct release of NO
Nitroprusside
Can cause cyanide toxicity
Nitroprusside
Cause vasodilation by increasing NO in vascular smooth muscle leading to increased cGMP and smooth muscle relaxation
Nitrates
Effect of nitrates on vessels at low doses
Veins»_space; arteries leads to decreased preload
Effect of nitrates on vessels at higher doses
Arteries > veins leads to decreased afterload
Indications for nitrates
Angina, ACS, pulmonary edema
When are nitrates contraindicated
Right ventricular infarction
Biochemical precursor of nitric oxide
Arginine
Nitrate side effects
Reflex tachycardia, HoTN, flushing, headache and “Monday disease” in industrial exposure
Hydralazine MOA
Increase cGMP causing smooth muscle relaxation
Effect of hydralazine on vessels
Vasodilates arterioles > veins decreasing afterload
Exposure to nitrates at work causes tolerance to vasodilatory effects during work week and loss of tolerance over the weekend leading to tachycardia, dizziness, and headache upon re-exposure
Monday disease
Goal of antianginal therapy
Reduce myocardial O2 consumption by decreasing >1 of HR, BP, EDV and contractility
Drug given with nitrates to prevent reflex tachycardia
B-blockers
Effect of nitrates on cardiac function
EDV - decreased BP - decreased Contractility - no effect HR - increased (reflex tachycardia) Ejection time - decreased MVO2 - decreased
Effect of B-blockers on cardiac function
EDV - no effect or increased BP - decreased Contractility - decreased HR - decreased Ejection time - increased MVO2 - decreased
Effect of nitrates + B-blockers on cardiac function
EDV - no effect or decreased BP - decreased Contractility - little to no effect HR - no effect or decreased Ejection time - little to no effect MVO2 - greatly decreased
B-blockers that should be used with caution in angina
Pinodolol and acebutolol (partial B-agonists)
CCB that is similar to B-blockers in effect
Verapamil
Partial B-blockers
Pinodolol and acebutolol
What are the nitrates
Nitroglycerin, isosorbide dinitrate, isosorbide mononitrate
Antianginal that inhibits the late phase of sodium current causing reduction in diastolic wall tension and O2 consumption without affecting contractility
Ranolazine
Indications for ranolazine
Refractory angina
Antianginal that causes constipation, dizziness, headache, nausea, and QT prolongation
Ranolazine
Selective PDE-3 inhibitor indicated for short-term use in acute decompensated HF
Milrinone
Milrinone side effects
Arrhythmias and hypotension
Milrinone MOA on cardiomyocytes
Increases cAMP causing Ca influx leading to increased inotropy and chronotropy
Milrinone MOA on vascular smooth muscle
Increases cAMP inhibiting MLCK and causing general vasodilation
Lipid lowering agents that causes myopathy when used with fibrates or niacin
Statins
Mechanism of statins
HMG-CoA reductase inhibitors
Cholesterol precursor that is inhibited by use of statins
Mevalonate
Effect of statins on CAD patients
Decreases mortality
Lipid lowering agent that causes hepatotoxicity
Statins
Lipid lowering agents that inhibit HMG-CoA reductase
Statins
Lipid lowering agent that causes decreased absorption of other drugs and fat soluble vitamins
Bile acid resins
Bile acid resin drugs
Cholestyramine
Colestipol
Colesevelam
Lipid lowering agent that prevents intestinal reabsorption of bile acids causing liver to use cholesterol to make more
Bile acid resins
Lipid lowering agent that slightly increases HDL and triglyceride levels with moderate decrease in LDL levels
Bile acid resins
Side effect of Bile acid resins
GI upset
Decrease absorption of drugs and fat soluble vitamins
Lipid lowering agent that causes rare increases in LFTs and diarrhea
Ezetimibe
Lipid lowering agent that prevents absorption at intestinal brush border
Ezetimibe