Exam 1 Flashcards
ACE Inhibitor Suffix
-pril
ARB Suffix
-sartan
Calcium Channel Blockers (DHPs) Suffix
-dipine
Beta-Blocker Suffix
-olol
Statins Suffix
-statin
A chronic, dry, non-productive cough is most likely to be observed with what medication?
ACE Inhibitors
What is the mechanism of action for ACE Inhibitors?
Stops the production of angiotensin II
What compound does ACE breakdown and what does it cause?
Bradykinin, causing it to last in the body for longer
What drug classes are used in the treatment of hypertension?
• ACE Inhibitors
• ARBs
• Calcium Channel Blockers
• Beta Blockers
• Diuretics
What heart failure patients should get ACE Inhibitors?
ALL patients with an ejection fraction ≤ 40%
ACE Inhibitors are particularly useful for the treatment of hypertension in patients with what other conditions?
Diabetes, diabetic nephropathy, post-MI, or high risk of coronary artery disease
Side Effects of ACE Inhibitors
• Hypotension & Dizziness
• Cough - dry, constant
• Angioedema - vasodilation in lungs
• Renal Dysfunction (↓ kidney function)
• Hyperkalemia (↑Potassium)
How do ACE Inhibitors impact blood pressure & potassium levels?
• ↑ Potassium
• ↓ BP
ACE Inhibitor Warnings & Drug Interactions
• do not use during pregnancy (fetal HTN)
• do not use with bilateral renal artery stenosis
Drug Interactions
• K+ supplements - ACE retains too much K+
• NSAIDs - can lead to acute renal failure
• constrict afferent while ACE constrict efferent
• Cyclosporine - ↑ risk of heart failure
ACE Inhibitor Drugs
• Benazepril
• Enalapril
• Lisinopril
• Ramipril
What is the mechanism of action of ARBs?
allows for production of angiotensin II but does NOT allow binding of Angiotensin II to the receptor
BLOCKS THE ANGIOTENSIN II RECEPTOR
Side Effects of ARBs
• LESS cough & angioedema (than ACE inhibitors)
• Hypotension & dizziness
• Renal Dysfunction (↓ kidney function)
• Hyperkalemia (↑ K+)
Similarities & Differences in ACE Inhibitors & ARBs
• Similar morbidity & mortality
• Similar in efficacy in HF (ACE inhibitors are better)
• ARBs have less cough & angioedema
ARB Drug Names
• Irbesartan
• Losartan
• Olmesartan
• Valsartan
Calcium Channel Blockers: what do they do and what do they cause?
• Block Ca+ from entering the cardiac muscle
CAUSE:
• ↓ HR
• Vasodilation (relax smooth muscles of blood vessels)
What do Dihydropyridines (DHPs) work on?
• only affect vasculature (NOT the heart muscle)
• Strong vasodilation
Which calcium channel blockers are the strongest vasodilators?
dihydropyridines
Calcium Channel Blocker Drugs - Non-DHPs
• Dilitiazem
• Verapamil
What do Non-DHP Calcium Channel Blockers do?
• ↓ HR
• Work in the heart & vessels
• Makes the heart beat with less force
What drugs are Non-DHP Calcium Channel Blockers & what do they do?
• Dilitiazem & Verapamil
• ↓ HR
• Work on the heart & vessels
• Heart beats with less force
Dihydropyridine (DHP) Calcium Channel Blocker Drugs
• Amlodipine
• Nifedipine
Common Adverse Effects of DHPs & Non-DHP Calcium Channel Blockers
DHPs
• Headache
• Flushing
• Pedal Edema
• Hypotension
• Reflex Tachycardia (↑ HR due to ↓ BP)
Non-DHPs
• Constipation
• Hypotension
• Bradycardia
• AV Block
• CHF
Common Adverse Side Effects of Non-DHP Calcium Channel Blockers
• Hypotension
• Constipation
• Bradycardia
• AV Block
• CHF
Common Adverse Effects of DHP Calcium Channel Blockers
• Hypotension
• Headache
• Flushing
• Pedal Edema
• Reflex Tachycardia (↑ HR due to ↓ BP)
Drug Interactions of Non-DHP Calcium Channel Blockers
Verapamil & Diltiazem
• can CAUSE many drug interactions
• SLOW the breakdown of other drugs
•change metabolism and/or transport of drugs
Drug Interactions of DHP Calcium Channel Blockers
Amlodepine
• Subject of many drug interactions
• Sensitive to changes caused by other drugs
What happens when B1 is activated by norepinephrine?
• ↑ HR
• ↑ Contractility
• ↑ Renin Release
What happens when B2 is activated by norepinephrine?
• Relaxation of vascular, bronchial, & uterine smooth muscle
• ↑ insulin release
• ↑ tremor
• ↑ glycogenolysis
• glycogen to glucose-1-phosphate & glucose
What happens when B3 is activated by norepinephrine?
• ↑ lipolysis
• ↑ urinary bladder relaxation
What happens when a1 is activated by norepinephrine?
• Vasoconstriction
• mydriasis
• piloerection
• ↑ glycogenolysis
What happens when a2 is activated by norepinephrine?
• ↓ neuronal transmitter release
• ↑ platelet aggregation
• ↓ lypolysis
• ↓ insulin release
What is the job of beta-blockers?
block the activation of beta receptors
What do beta blockers do for patients with heart failure?
↓ heart rate & ↓ cardiac output, ultimately making patients feel worse at first
What happens when B1 & B2 receptors are antagonized (blocked)?
• ↓ heart rate
• ↓ contractility
• ↓ renin release (↓ angiotensin II)
What conditions are beta blockers used to treat?
• Hypertension
• Anxiety
• Tremors
• Arrhythmias
• Heart Failure
Mechanisms of Beta Blockers
• Restore HR (variability)
• Prevent arrhythmia
• Prevent / slow remodeling process
• special dose (“start low, go slow” & “target dose”)
Common Adverse Effects of Beta Blockers
• Bronchospasm
• blocking B2 causes smooth muscle contraction
• AVOID in patients with COPD, asthma, etc.
• Heart failure
• Bradycardia / bradyarrhythmias
• Vasospasm (B2)
• Metabolic Abnormalities
• ↓ HDL
• Hyperglycemia / ↓ insulin sensitivity
• Depression
• Withdrawal syndrome
Beta Blocker Drugs
• Metoprolol
• Atenolol
• Propranolol
• Carvedilol
• Labetolol
• Nebivolol
What are the 3 different Beta-Blocker Drug Types?
• Selective Agents (metoprolol & atenolol)
• Non-Selective Agents (Propranolol)
• Vasodilating Agents (Carvedilol, Labetolol, Nebivolol)
What Beta Blockers are Selective Agents?
• Metoprolol
• Atenolol
What Beta Blockers are Non-Selective Agents
• Propranolol
What Beta Blockers are Vasodilating Agents?
• Carvedilol
• Labetolol
• Nebivolol
What are the 3 classes of Diuretics?
• Loops - Furosemide
• Thiazide & Thiazide-like - Hydrochlorothiazide
• Potassium-Sparing - triamterene
What are Diuretics used to treat?
Hypertension (thiazides)
Heart Failure & Fluid overload (loops)
Thiazides are mainly used to treat what condition?
Hypertension
• morbidity & mortality benefits
Loop diuretics are mainly used to treat what condition?
Heart Failure & Fluid Overload
• symptomatic improvement only (no ↑ survival)
Common Adverse Effects of Diuretics
• Hypovolemia - low intravascular volume
• Hyperglycemia (↑ blood sugar)
• ↑ Cholesterol & Triglycerides
• ↑ Ca+ with Thiazides & ↓ Ca+ with Loops
• ↓ Potassium (K+)
• ↓ Magnesium
• Hyperuricemia (↑ uric acid)
What is the key difference in common adverse side effects associated with thiazides vs. loop diuretics?
Thiazides ↑ Calcium
Loops ↓ Calcium
Diuretics, ADEs, & Other Drug Problems
• Impotence
• Potential problems with diuretics
• diuretic resistance
• thiazide sensitivity to renal function
DRUG INTERACTIONS
• Digoxin
• Lithium
• NSAIDs
• ACE Inhibitors or K+ supplements
Drug Interactions associated with Diuretics (ADEs & Other Drugs)
• Digoxin
• Lithium
• NSAIDs
• ACE Inhibitors or K+ Supplements
Diuretic Drugs
• Chlorthalidone
• Hydrochlorothiazide
• Triamterene
• Spironolactone
• Furosemide
Which diuretic is required for advanced heart failure and why?
Spironolactone because it blocks aldosterone
Statin Drugs
• Atorvastatin
• Lovastatin
• Pravastatin
• Rosuvastatin
• Simvastatin
What are Statins (HMG CoA Reductase Inhibitors) used to treat?
lower cholesterol, specifically LDLs
Mechanism of Action for HMG CoA Reductase Inhibitors (Statins)
Blocks synthesis of HMG CoA forcing bile to be made by synthesizing cholesterol from LDL in the blood
Key Concepts about Statins
1.) GOLD STANDARD for reducing LDL
• not good for isolated high triglycerides
• may even be beneficial if “normal” LDL
2.) Relatively flat dose-response curve
• only 5-6% more LDL lowering for double dose
• start with dose close to expected need
3.) Doses should be given in the evening or at bedtime
• because statins have a short half-life
Adverse Side Effects of Statins (Major & Minor)
MAJOR
• Myalgia (muscle pain)
• Myopathy
• Rhabodomyolysis (muscle tissue breakdown)
MINOR
• Dyspepsia / heartburn
• Headache
• Taste disturbances
• Diabetes (?)
What are the Major Adverse Side Effects of Statins?
• Myalgias (muscle pain)
• Myopathy
• Rhabdomyolysis (muscle tissue breakdown)
What are the Minor Adverse Side Effects of Statins?
• Dyspepsia / Heartburn
• Headache
• Taste Disturbances
• Diabetes
Mechanism of Action for Fibrates
Primary focus is on LDLs due to risk of heart disease
EFFECTS ON LIPIDS
• ↓ Total Cholesterol
• ↓ LDLs
• ↑↑ HDLs
• ↓↓↓ Triglycerides
Common Adverse Effects of Fibrates
• Nausea
• Diarrhea
• Cholelithiasis (gallstones)
• Phototoxicity
Drug Interactions of Fibrates
• ↑ risk of hepatotoxicity and/or myalgias with concurrent statins and/or niacin
* DO NOT USE WITH STATINS *
• Protein binding displacement (Warfarin) = ↑ rhabdo risk
Fibrate Drugs
• Ezetimibe (Zetia) - blocks absorption fo LDL
• Gemfibrozil
• Fenofibrate
Mechanism of Action for Ezetimibe (Zetia) - Fibrate
• Blocks absorption of LDL (cholesterol absorption inhibitor)
• Modestly lowers LDL
• Increases HDL
Which Fibrate drug interacts and cannot be taken with Statins?
Gemfibrozil
What is unique about Ezetimibe (Zetia)?
It is a fibrate drug that is made to be used WITH statins
What are Omega-3 Fatty Acids used for and what are they made up of?
• ↑ HDL
• ↓ Triglycerides
• can slightly increase LDL
Ratio of EPA to DHA varies based on the drug
What are adverse side effects associated with the use of Omega-3 Fatty Acids?
• Prolonged bleeding / impaired platelet function
What are anti-arrhythmics used to treat?
arrhythmias / abnormal heartbeats (A-Fib, V-Fib)
What are the different classes of Anti-Arrhythmics and what do they each work on?
• Class I – Na+ channels (blockade)
• Class II – Beta Receptors (blockade)
• Class III – K+ Channels (prolonged repolarization)
• Class IV – Ca+ Channels (blockade)
What is Amiodarone and what is unique about it?
Anti-Arrhythmic
Technically Class III (K+ channels; ↑ repolarization), but it works across all classes
What are adverse side effects of Amiodarone?
MOST SEVERE
• Pulmonary Fibrosis (irreversible)
• Thyroid Toxicity (hyperthyroid & hypothyroid)
OTHER
• Pneumonitis
• Cardiotoxicity (bradycardia, hypotension)
• Liver toxicity
• Ophthalmic toxicities
• Dermatologic toxicity (blue/gray skin color)
• Drug interactions
What is the most common arrhythmia caused by Class I anti-arrhythmics (think of the Amiodarone drug study)?
Torsades de Pointes (TdP) - difficult to treat, can be fatal
Although Amiodarone has a long list of adverse side effects, what does it have a low risk of causing?
Torsades de Pointes (TdP)
Anti-Arrhythmic Drugs
• Amiodarone (Class III)
• Flecainide (Class IC - 1C)
What is the most common Anti-Arrhythmic used today?
Amiodarone
What do all anti-arrhythmics have a risk of causing?
Torsades de Pointes (TdP)
What is Flecainide used for?
treatment of A-Fib in patients WITHOUT structural heart issues
Common Adverse Effects of Flecainide
• Dizziness
• Visual disturbances
• Dyspnea
• Prolonged QT waves / TdP
Mechanism of Action in Antiepileptic Drugs (AEDs)
Impair activation of CNS Neurons
• suppress Na+ influx
• suppress Ca+ influx (↓ transmitter release)
• promote K+ efflux
• antagonize glutamate (block excitatory NT)
• enhance GABA (enhance inhibitory NT)
Side Effects of Antiepileptic Drugs
CNS Side Effects
• Impaired cognition (speech, concentration, etc.)
• Dizziness
• Drowsiness
• Diplopia
• Ataxia
• Incoordination
• Weakness
Suicide Risk
• AEDs increase risk 2x (↑ w/ topiramate, lamotrigine)
Pregnancy Risks
What are the CNS Side Effects of Antiepileptic Drugs?
• Ataxia
• Dizziness
• Diplopia
• Drowsiness
• Impaired Cognition (speech, concentration, etc.)
• Incoordination
• Weakness
What are the 2 classes of antiepileptic drugs?
Older (made prior to 1970s) & Newer (1990s & after)
What is unique about older antiepileptic drugs?
• Complicated pharmacokinetics (body gets used to drug, may have to increase dose)
• High drug interaction risk
• More adverse side effects
• most w/ CNS depressant effects
• possible negative effects on learning / cognition
• Greater experience…more effective?
• effective even when “new class” does NOT work
Older Antiepileptic Drugs
• Carbamazepine
• Valproic acid / Divalproex
Adverse Side Effects Associated with Carbamazepine
• May cause severe skin rash (Stevens-Johnsons Syndrome)
• Asians have it worse, need genetic testing
What is unique about Newer Antiepileptic Drugs?
• Straightforward pharmacokinetics
• Generally few drug interactions
• Fewer adverse effects
• less significant CNS depressant effects
• safer / lower risk in pregnancy
• Less experience (because they’re newer)
Which class of antiepileptic drugs are better to use in pregnancy due to them having a lower risk / being safer?
Newer Antiepileptic Drugs
Newer Antiepileptic Drugs
• Gabapentin
• Lamotrigine (Lamictal)
• Levetiracetam (Keppra)
• Oxcarbazepine (Trileptal)
• Pregabalin (Lyrica)
• Topiramate (Topamax)
Side Effects & Other Considerations of Newer Antiepileptic Drugs
Gabapentin
• drowsiness & nystagmus
Lamotrigine (Lamictal)
• rash is relatively common…serious in <1%
Levetiracetam (Keppra)
• IV & PO (route drug can be given)
• CNS effects (drowsiness, aggression, psychosis)
• ↑ BP
Oxcarbazepine (Trileptal)
• CNS effects (drowsiness, dizziness, ataxia)
• Nausea & Vomiting
Pregabalin
• Weight gain
• Angioedema
• Euphoria (considered a schedule V (5) drug)
Topiramate
• Metabolic acidosis
• Kidney stones
Side Effects of Oxcarbazepine & Carbamazepine
CNS Effects
• drowsiness
• dizziness
• ataxia
Side Effects of Gabapentin
• drowsiness
• nystagmus
- Not a good seizure med; mainly used for nerve pain*
Adverse Side Effects Lamotrigine (Lamictal)
Rash is relatively common
• serious in <1%
Adverse Side Effects of Levetiracetam (Keppra)
CNS Effects
• drowsiness
• aggression
• psychosis
↑ BP
Adverse Side Effects of Topiramate
• Metabolic Acidosis
• Kidney Stones
Other Issues with Antiepileptic Drugs
• Status epilepticus (acute ongoing seizure)
• Therapeutic Drug Monitoring
• Stopping therapy (avoid stopping cold turkey)
• Pregnancy
• some risk with all, but usually woman remain on med
Treatment Goals Diabetic Drugs
• Achieve & maintain HbA1C of < 7%
• Reduce microvascular & microvascular complications
• micro = neuropathy, retinopathy, amputation
• macro = heart attack, stroke, etc.
How does better control of A1C affect microvascular & microvascular events?
• ↓ microvascular events
• neuropathy, retinopathy, vision loss, amputate
• NO ↓ in macrovascular events (stroke, MI, etc.)
Clinical Actions of Insulin
• ↑ glucose, amino acid, fatty acids, & K+ uptake
• ↑ glycogen, protein, & triglyceride synthesis
Long-Acting Insulin Agents
• Detemir (Levemir) & Glargine (Lantus) are associated with LOWER risk of hypoglycemia than NPH
Long-Acting Insulin Drugs
• Detemir (Levemir)
• Glargine (Lantus)
• Degludec (Tresiba)
Shorter-Acting Insulin Agents
• Rapid-acting products preferred to regular insulin due to their faster onset of action & a lower risk of hypoglycemia
Short / Rapid Acting Insulin
• Lispro (humalog)
• Aspart (novolog)
What is the order of Insulin Agents used to lower the risk of hypoglycemia?
1.) Rapid / short-acting
2.) Regular / long-acting
3.) NPH