Cardio Drugs Flashcards
Procainamide
CLASS 1A - Na CHANNEL BLOCKER
MOA:
Class IA: slows phase 0
Class III: prolongs AP
Indication: Most atrial and ventricular arrhythmia (short term because the duration of the action is short)
Adverse effects: Torsade’s de pointes (NAPA metabolite); Lupus syndrome
Quinidine
CLASS 1A - Na CHANNEL BLOCKER
MOA:
Class IA: slows phase 0
Class III: prolongs AP
Indication: Atrial, AV junctional and ventricular arrhythmia
Contraindication: Signs of cinchonism (tinnitus, decreased hearing, headache, nausea, vomiting, dysphoria, and visual disturbances)
Adverse effects: Torsade’s de Pointes
Disopyramide
CLASS 1A - Na CHANNEL BLOCKER
MOA:
Class IA: slows phase 0
Class III: prolongs AP
Indications: only ventricular arrhythmia
Contraindication: Heart failure
Adverse effects: anti-muscarinic (dry eyes, urinary retention, constipation)
Lidocaine
CLASS 1B - Na CHANNEL BLOCKER
MOA:
Class IB: Shortens phase 3 repolarization (decreased QT) B- best for post MI
Indications: Wide TI; ventricular arrhythmia (post-MI); prevention of ventricular fibrillation following cardioversion
Adverse effects: CNS toxicity (SLAP CNS) sleepy, lidocaine, agitation, paresthesia, convulsions, nystagmus, slurred speech
Mexiletine
CLASS 1B - Na CHANNEL BLOCKER
MOA:
Class IB: Shortens phase 3 repolarization (decreased QT) B- best for post MI
Indications: Narrow TI; Ventricular arrhythmia
Adverse effects: nausea, vomiting, dyspepsia, CNS
Flecainide
CLASS 1C - Na CHANNEL BLOCKER
MOA:
Class IC: Markedly slows phase 0 depolarization
Class III: prolongs AP
Indications: SV arrhythmia with normal hearts; recurrent afib
Contraindications: Pre-existing ventricular tachycardia, ventricular ectopy; Can’t give post MI
Adverse effects: limited use due to prolonged QRS, proarrhythmic effects; use with caution with potent inhibitors of CYP2D6
Propafenone
CLASS 1C - Na CHANNEL BLOCKER
MOA:
Class IC: Markedly slows phase 0 depolarization
(Weak) Class II: beta blocking activity
Indications: Atrial arrhythmia
Contraindications: Asthma
Adverse effects: Bronchospasm
Metoprolol
CLASS 2 - BETA BLOCKER
MOA: Selective B1 adrenergic antagonist
Indication: Atrial fib/flutter; PAC/PVC; VT; Post-MI
Contraindication: sinus bradycardia, heart block greater than first degree, cardiogenic shock and overt cardiac failure; Prinzmetal/vasospastic angina
Adverse effects: fatigue, dizziness, depression, bradycardia
Sudden discontinuation in patients with IHD - severe angina, MI, and VA are likely
Drug interactions: MAOI, digitalis glycoside, SSRI’s, antipsychotics, antiretroviral drugs, antimalarial and other antiarrhythmics, inhibitors of CYP2D6
Esmolol
CLASS 2 - BETA BLOCKER
MOA: Non-selective; Short and fast acting beta blocker; rapidly metabolized by esterases in RBC’s
Indications: Acute arrhythmia during surgery or emergency situations
Contraindication: sinus bradycardia, heart block greater than first degree, cardiogenic shock and overt cardiac failure; Prinzmetal/vasospastic angina
Adverse effects: symptomatic hypotension, dizziness, bronchospasm, nausea
Acebutolol
CLASS 2 - BETA BLOCKER
MOA: Non-selective beta blocker with mild intrinsic sympathomimetric activity (partial agonist)
Indications: Tachyarrhythmias, AVNRT, ventricular arrhythmia follow MI
Contraindication: sinus bradycardia, heart block greater than first degree, cardiogenic shock and overt cardiac failure; Prinzmetal/vasospastic angina
Adverse effects: symptomatic hypotension, dizziness, bronchospasm, nausea
Propranolol
CLASS 2 - BETA BLOCKER
MOA: Non-selective; completely blocks both beta 1 and beta 2 adrenergic receptors
Indications: HTN; prevention of sudden death/reinfarction post MI; adjunct therapy with alpha blockers for pheochromocytoma; cardiac arrhythmia
Contraindication: sinus bradycardia, heart block greater than first degree, cardiogenic shock and overt cardiac failure; Prinzmetal/vasospastic angina
Adverse effect: fatigue, brochoconstriction, sexual dysfunction, arrhythmia, bradycardia
Atenolol
CLASS 2 - BETA BLOCKER
MOA: selective beta 1 receptor blocker
Indications: hypertension; management of hemodynamically stable patients with definite or suspected acute myocardial infarction to reduce cardiovascular mortality
Contraindication: sinus bradycardia, heart block greater than first degree, cardiogenic shock, and overt cardiac failure
Adverse effects: fatigue, bronchoconstriction, sexual dysfunction, arrhythmia
Labetolol
CLASS 2 - BETA BLOCKER
MOA: selectively blocks alpha 1 and nonselective B1 and B2 receptors; dose-related falls in blood pressure without reflex tachycardia and without significant reduction in heart rate
Indications: hypertension; second choice for treating hypertension in pregnancy
Contraindication: heart block greater than first degree, cardiogenic shock and overt cardiac failure; Prinzmetal/vasospastic angina
Adverse effects: fatigue, bronchoconstriction, sexual dysfunction, arrhythmia, postural hypotension
Amiodarone
CLASS 3 - K CHANNEL BLOCKER
MOA:
Predominantly Class III
Significant Class Ia activity (inactivity state)
Weak class II
Weak class IV
T 1/2 life is 3-10 days (remainder 58 days)
Indications: serious VT - most effective; more often in older patients due to accumulation and toxicity is associated with how long you’re on the drug. Base line testing prior to starting (CXR, PFTs, LFTs, TFTs)
Contraindications: Greater than first degree heart block; Drug interactions with those that inhibit CYP3A4/CYP2C8
Adverse effects: Torsade’s de Pointes; photo dermatitis and gray-blue discoloration, asymptomatic corneal microdeposits, symptomatic bradycardia and heart block, hypothyroidism, abnormal liver function tests and hypersensitivity hepatitis, and fatal pulmonary fibrosis
Dronedarone
CLASS 3 - K CHANNEL BLOCKER
MOA:
Predominantly Class III
Significant Class Ia activity (inactivity state)
Weak class II
Weak class IV; (doesn’t contain iodine like Amiodarone)
Indications: atrial fibrillation
Contraindications: patients with acute decompensated or chronic heart failure
Adverse effects: lack pulmonary and thyroid toxicity associated with Amiodarone
Sotalol
CLASS 3 - K CHANNEL BLOCKER
MOA:
D-Solatol is class III
L-Sotalol is class II
Indications: Ventricular tachyarrhythmias and atrial fibrillation or flutter
Contraindications: Bronchial asthma; sinus bradycardia
Adverse effects: beta blocker effects; Torsades de Pointes especially with low serum K concentrations; reverse use dependent (less effective at higher HR)
Dofetilide
CLASS 3 - K CHANNEL BLOCKER
MOA:
Class III: Pure K+ channel blocker
Indications: Persistent atrial fibrillation
Adverse effects: Torsade de pointes
Ibutilide
CLASS 3 - K CHANNEL BLOCKER
MOA:
Class III: K+ channel blocker
Class Ia: Na+ channel blocker
Indication: Drug of choice for chemical conversion of atrial flutter
Contraindications: Oral due to heavy first pass metabolism; initiation in hospital setting due to high risk of arrhythmia
Adverse effects: Torsade de pointes
Verapamil
CLASS 4 - Ca CHANNEL BLOCKER (Non-dihydropyridine)
MOA:
Class IV: L-type calcium channel blocker, binds the channels at a different site than diltiazem or dihydropyridines
Indications: Control of ventricular rate in patients with chronic atrial fibrillation/flutter; PSVT, drug of choice for prophylaxis
Contradictions: severe hypotension, 2nd or 3rd degree AV block, cardiogenic shock, severe CHF, sick sinus syndrome (unless has artificial pacemaker), severe LV dysfunction
Adverse effects: constipation, bradycardia, AV conduction block, asystole
Diltiazem
CLASS 4 - Ca CHANNEL BLOCKER
MOA:
Class IV: blocks L-type calcium channel (cardiac and vascular)
Indications: control of ventricular rate in atrial fibrillation or flutter; vasospastic and class angina (prophylactic treatment); hypertension
Contraindications: Hypotension, AV block (2nd or 3rd degree) or sick sinus syndrome, acute MI, pulmonary congestion, lactation (excreted in human milk)
Adverse effects: Hypotension, AV conduction block, bradycardia, constipation
Nifedipine
CLASS 4 - Ca CHANNEL BLOCKER
MOA:
Class IV: Vascular selective L-type calcium channel blocker; directly dilates peripheral arterioles
Indication: HTN (elderly, African Americans, individuals with decreased renin level), angina of effort, vasospastic angina
Contraindication: Inhibition of P-glycoprotein (Verapamil); inhibition of CYP3A4
Cimetidine- 80% increased in Nifedipine plasma levels
Adverse effects: dizziness, flushing, headache, transient hypotension, peripheral edema, reflex tachycardia
Amlodipine
CLASS 4 - Ca CHANNEL BLOCKER
MOA:
Class IV: Vascular selective L-calcium channel blocker; directly dilates peripheral arterioles
Indications: HTN (elderly, African American, individuals with decreased renin levels), angina
Contraindication: Inhibition of P-glycoprotein (Verapamil); inhibition of CYP3A4
Adverse effects: dizziness, flushing, headache, transient hypotension, peripheral edema, reflex tachycardia
Clonidine
CNS ACTING A2 ADRENERGIC AGONIST
MOA: Alpha 2 adrenergic agonist; activates the vasomotor center of the brain stem to reduce sympathetic outflow and reduce blood pressure by decreasing TPR, decreasing renal vascular resistance, reducing HR and SV, and increasing parasympathetic tone as well
Indications: hypertension (not recommended for initial treatment)
Contraindications: fluid retention and edema (concurrent therapy with a diuretic is necessary); patients with heart failure with reduced EF;
Adverse effects: dry mouth, dizziness, constipation, orthostatic hypotension, impotence, nausea, GI upset; sudden discontinuation causes hypertension rebound; may potentiate the CNS depressive effects of alcohol, barbiturates or other sedating drugs
Methylodopa
CNS ACTING A2 ADRENERGIC AGONIST
MOA: Prodrug; metabolite of alpha-methylnorepinephrine and lowers arterial pressure by false neurotransmission by replacing vascular NE with alpha-methylnorepinephrine, activation of presynaptic alpha 2 receptors in the the brain stem reduces sympathetic outflow, lowering blood pressure, and reduction of plasma renin activity
Indication: hypertension during pregnancy as a replacement for ACE inhibitors or ARBs
Contraindication: Hepatic disease
Adverse effects: transient sedation, depression, hepatotoxicity, hemolytic anemia
Prazosin
ALPHA ADRENERGIC ANTAGONIST
MOA: Alpha 1 antagonist - block of alpha-1 mediated sympathetic tone in blood vessels. No reflex tachycardia.
Indications: hypertension; it can be used alone or in combination with other antihypertensive drugs
Adverse effects: dizziness, orthostatic hypotension, nasal congestion, headache, fluid retention
Doxazosin
ALPHA ADRENERGIC ANTAGONIST
MOA: Alpha 1 adrenergic receptor antagonist
Indications: BPH and optional drug for HTN but its more useful in those patients with both BPH and HTN
Adverse effect: dizziness, palpitation, headache, lassitude
Phenoxylbenzamine
ALPHA ADRENERGIC ANTAGONIST
MOA: A long acting, nonselective, noncompetitive, alpha receptor blocker; binds covalently to alpha receptors; also inhibits the presynaptic reuptake of released NE, and blocks H-1 histamine, ACh, and serotonin receptors
Indications: Pheochromocytoma (increased cortisol); to control episodes of hypertension and sweating, excessive tachycardia can be prevented by a concomitant use of a beta blocker
Adverse effects: dizziness, tachycardia, drowsiness, shock, syncope, and postural hypotension
Captopril
ACE INHIBITORS MOA: ACE inhibitor Prevents inhibition of bradykinin T1/2: 2 hours Sulfhydryl-containing
Indications: hypertension, heart failure, diabetic nephropathy
Contraindication: pregnancy, bilateral renovascular disease, hyperkalemia; NSAIDs
Adverse effect: acute renal failure, dry cough, hyperkalemia, skin rash, hypotension, alteration or loss of taste, angioedema
Enalapril
ACE INHIBITORS MOA: ACE inhibitor Prevents inhibition of bradykinin T1/2: 11 hours Dicarboxyl-containing
Indications: hypertension, heart failure, diabetic nephropathy
Contraindication: pregnancy, bilateral renovascular disease, hyperkalemia; NSAIDs
Adverse effect: acute renal failure, dry cough, hyperkalemia, skin rash, hypotension, alteration or loss of taste, angioedema
Fosinopril
ACE INHIBITORS MOA: ACE inhibitor Prevents inhibition of bradykinin T1/2: 11.5 hours Phosphorus containing
Indications: hypertension, heart failure, diabetic nephropathy
Contraindication: pregnancy, bilateral renovascular disease, hyperkalemia; NSAIDs
Adverse effect: acute renal failure, dry cough, hyperkalemia, skin rash, hypotension, alteration or loss of taste, angioedema
Lisinopril
ACE INHIBITORS MOA: ACE inhibitor Prevents inhibition of bradykinin T1/2: 12 hours Dicarboxyl-containing
Indications: hypertension, heart failure, diabetic nephropathy
Contraindication: pregnancy, bilateral renovascular disease, hyperkalemia; NSAIDs
Adverse effect: acute renal failure, dry cough, hyperkalemia, skin rash, hypotension, alteration or loss of taste, angioedema