Drugs Flashcards
1
Q
Colesevelam
A
- Bile Acid Binding Sequestrant (gel)
- Lower LDL ~20%
- Very safe, non-systemic, but cannot be used if triglycerides >250
2
Q
Ticlopidine
A
- Platelet aggregation inhibitor
- ADP receptor blocking agent
- Trade name: Ticlid, use is associated with increased incidence of Thrombotic Thrombocytopenic Purpura (TTP) in 1:2000-4000 patients
3
Q
Nitroglycerin
A
- IV Vasodilator
- Primarily a venodilator
4
Q
Mexiletine
A
- Ib
- Binds INa+ channel in active and inactive states, but not in the resting state. So it has little effect in normal tissue, but does exert effects in sick (ischemic) tissue.
- Chronic suppression of ventricular arrhythmias (not first line, but sometimes)
- Nausea, vomiting
5
Q
Methyldopa
A
- Centrally acting agent
- Replaces norepinephrine in secretory vesicles in adrenergic neurons. Acts centrally on the brain to inhibit central adrenergic outflow.
- Useful for hypertension in pregnancy, but many side effects
- Sedation, dry mouth, fatigue, depression, liver toxicity
6
Q
Aspirin
A
- Platelet aggregation inhibitor
- Acetylates cyclooxygenase, irreversibly inhibiting it. Prevents production of ThromboxaneA2 (platelet activator)
- Function returns to normal after 7-10 days when new platelets appear in circulation.
7
Q
Milrinone
A
- Inotrope
- Phsophodiesterase inhibitor
8
Q
Digoxin
A
- Inotrope
- Complicated mechanism: direct membrane effects (mediated by blocking Na+/K+ ATPase), and indirect effects (vagomimetic). Slows conduction, mainly in the SA node, atria, and AV node.
- Control of ventricular response in atrial fibrillation/flutter (usually with a β-blocker or Ca2+ channel blocker)
- Yellow vision, anorexia, nausea, vomiting, disorientation, hallucination. Toxicity treated with anti-digoxin antibody fragments
9
Q
Amiodarone
A
- III
- Blocks potassium channels, increases action potential duration and effective refractory period. Also blocks Na+ channels, β receptors, and Ca2+ channels (class I, II, and IV-like effects). Most effective, but has significant side effects.
- Suppression of ventricular tachycardia (defibrillators more effective). Maintenance of sinus rhythm in atrial fibrillation/flutter. Acute conversion from atrial fibrillation to sinus rhythm.
- Hyperthyroidism and hypothyroidism. Pulmonary fibrosis, liver toxicity, photodermatitis (grayish-blue skin discoloration). Dronedarone, a congener, has fewer side effects.
10
Q
Propanolol
A
- Beta blocker
- Blocks the B1 and B2 receptors
- Basically decrease CO. Decreasing HR, decreased contractility, and decreased renin release. Also causes vasoconstriction and a slight increase in PVR. Used in patients with CAD, and for hypertension (but not as the sole agent)
- Bradycardia, hyperkalemia, fatigue, cold extremeties, bronchospasm.
11
Q
Ibutilide
A
- III
- K+ channel blocker
- Acute termination of atrial fibrillation and atrial flutter
- Few extracardiac effects other than GI complaints
12
Q
Torsemide
A
- Loop Diuretic
- Inhibit the Na-K-2Cl symporter in the thick ascending loop of Henle
- Rapid diuresis, HTN in CKD
- Hypokalemia, hypocalcemia, hypomagnesemia, increased LDL and triglycerides, hyperglycemia
13
Q
Nifedipine
A
- Calcium channel blocker (Dihydropyridine)
- Block the L-type calcium channel (primarily in smooth muscle), relaxing smooth muscle
- Hypertension, decreases cardiac output and PVR. Good in patients with diabetes, renal insufficiency, lipid problems, and asthma.
- Peripheral edema, headaches, flushing, dizziness, GERD, constipation
14
Q
Angiotensin receptor blocker (-artan)
A
- Oral Vasodilator
- Block the angiotensin II receptor (AT1), decreasing sympathetic activation, relaxing smooth muscles, and causing diuresis
- Hyperkalemia, renal failure, teratogenic!
15
Q
Apixiban
A
- Direct Factor Xa Inhibitor
- Small molecule inhibitor of factor Xa (free and bound)
- Anticoagulant
- Trade name: Eliquis, monitoring not required
16
Q
Verapamil
A
- Calcium channel blocker (phenylalkylamine)
- Block the L-type calcium channel (mostly cardiac), relaxing smooth muscle
- Hypertension, greatly reduces PVR. Good in patients with diabetes, renal insufficiency, lipid problems, and asthma.Constipation, dizziness, nausea, bradycardia
17
Q
Atorvastatin
A
- Statin
- Inhibits HMG CoA Reductase, decreasing cholesterol synthesis. Leads to increased LDL receptors
- High intensity (40/80 mg/day), moderate intensity (10 mg/day)CYP3A4
18
Q
Lidocaine
A
- Ib
- Binds INa+ channel in active and inactive states, but not in the resting state. So it has little effect in normal tissue, but does exert effects in sick (ischemic) tissue.
- Ventricular arrhythmias, particular post-MI
- CNS toxicity: confusion, delirium, paresthesias, grand mal seizures
19
Q
Spironolactone
A
- Potassium Sparing Diuretic
- Antagonizes the mineralcorticoid (aldosterone) receptor on epithelial cells in the late distal tubule and cortical collecting duct
- Diuretic, generally an add-on therapy with another diuretic class
- Hyperkalemia, gynecomastia
20
Q
Aliskiren
A
Inhibit renin
21
Q
Ezetimibe
A
- Cholesterol absorption inhibitor
- Absorbed, glucuronidated, and then localizes to the intestinal villi, preventing absorption of cholesterol
- Lower LDL ~20%
- Useful in combination with a moderate intensity statin
22
Q
Lovastatin
A
- Statin
- Inhibits HMG CoA Reductase, decreasing cholesterol synthesis. Leads to increased LDL receptors
- Moderate intensity
23
Q
Niacin
A
- Vitamin B3
- Potent inhibitor of adipose tissue lipolysis by activating GPR109A (a GPCR). This decreases flux of free fatty acids to the liver for VLDL production
- Lowers LDL and VLDL, raises HDL
- No measurable benefit when added to a statin. Take aspirin before niacin to avoid cutaneous vasodilation and flushing.
24
Q
PCSK9 Inhibitors
A
- Disinhibit LDLR
- Dec LDL
- Myalgias, Delerium, Dementia
25
Q
Dobutamine
A
- Inotrope
- Beta I and B2 agonist
26
Q
Ethycrinic Acid
A
- Loop Diuretic
- Inhibit the Na-K-2Cl symporter in the thick ascending loop of Henle
- Rapid diuresis, HTN in CKD
- Ototoxicity, hypokalemia, hypocalcemia, hypomagnesemia, increased LDL and triglycerides, hyperglycemia
27
Q
Digoxin
A
- Unclassified
- Complicated mechanism: direct membrane effects (mediated by blocking Na+/K+ ATPase), and indirect effects (vagomimetic). Slows conduction, mainly in the SA node, atria, and AV node.
- Control of ventricular response in atrial fibrillation/flutter (usually with a β-blocker or Ca2+ channel blocker)
- Yellow vision, anorexia, nausea, vomiting, disorientation, hallucination. Toxicity treated with anti-digoxin antibody fragments
28
Q
Tenecteplase (TNK-tPa)
A
- Act plasminogen
- Higher fibrin specificity
- Direct plasminogen activation
29
Q
Propafenone
A
- Ic
- Sodium channel blocker, some β-blocking activity, negative inotropic effects
- Acute conversion of atrial fibrillation to sinus rhythm. Maintenance of sinus rhythm in atrial fibrillation. Suppression of premature ventricular contractions (rarely used for this, raises mortality).
- Can exacerbate bronchospasm (β-blocker…)
30
Q
Minoxidil
A
- Peripheral vasodilator
- Activates a potassium channel in vascular smooth muscle, causing K efflux. This hyperpolarizes the cell and relaxes it.
- Lower blood pressure in difficult patients
- Water and sodium retention, tachycardia/angina/heart failure, hypertrichosis, effusions
31
Q
Hirudin
A
- Direct Thrombin Inhibitor
- Binds both the active pocket site and fibrinogen binding exosite on thrombin.
- Anticoagulant
- Originally derived from leeches, now made with recombinant DNA technology
32
Q
Nitroprusside
A
- IV Vasodilator
- Metabolized by blood vessels to nitric oxide, causing vasodilation.
- Lower blood pressure in difficult patients or emergencies. Mixed venous and arterial vasodilator
- Hypotension, cyanide and thiocyanate toxicity. IV only
33
Q
Heparin
A
- Heparin
- Lower molecular weight inhibits Xa, higher molecular weight inhibits thrombin and binds platelets. All enhance antithrombin activity.
- Anticoagulant
- Can cause heparin induced thrombocytopenia, and osteoporosis (when used chronically), can be self administered.
34
Q
Chlorthiazide, metolazone
A
- Thiazide Diuretic
- Inhibit the Na-Cl symporter in the distal convoluted tubule
- First line hypertension
- Hypokalemia, hyponatremia, hypercalcemia, impotence, impaired glucose tolerance, increased cholesterol
35
Q
Disopyramide
A
- Ia
- Blocks INa and blocks IKr, slowing the action potential upstroke and prolonging the action potential duration. Also binds the M2 muscarinic receptor for vagolytic effects (stronger than quinidine)
- Hypertrophic obstructive cardiomyopathy (but not commonly used)
- Antimuscarinic side effects (urinary retention, constipation, blurred vision, dry mouth, closed-angle glaucoma)
36
Q
Cholestryamine
A
- Bile Acid Binding Sequestrant (resin)
- Binds bile acids in the gut, causing depletion of hepatic cholesterol pools and increased production of LDL receptors. Lower LDL ~20%
- Very safe, non-systemic, but cannot be used if triglycerides >250