Clinical Therapeutics Flashcards
What is the Mechanism of Action of Aspirin
What is it used for
Side Effects
COX inhibitor, which impairs transformation of arachidonic acid which decreases prostaglandins, decreases thromboxane A2 and finally DECREASES PLATELET AGGREGATION (Irreversible!)
Used for Analgesia, Prophylaxis for AMI/TIA/CVA, Acute Coronary Syndrome
SE: Dyspepsia, GI Bleed, Reye’s Syndrome (kids with viral infection), Ringing of ears (SNHL), Bronchospasms in asthma
What is the Mechanism of Action of Clopidogrel
What is it used for
Side Effects
Irreversible Platelet Binding
Used for Cardiac Stents, TIA
SE: Brusing/Bleeding, TTP
What is the Mechanism of Action of Warfarin
What is it used for
What are things to be careful with use of Warfarin
Side Effects
Inhibits Vitamin K, which is needed for clotting cascade (Factors 2, 7, 9 and 10, Protein C and S)
Used to prevent and treat Thrombosis, Embolisms (DVT, A.Fib)
Need to measure INR (INR>10 leads to non-life threatening hemorrhage)
Reversible with administration of IV Vitamin K plus FFP
Careful with use with Antibiotics, as many interfere
SE: Bleeding/Hemorrhage, Purple Toe Syndrome, Skin Necrosis, Teratogenic
What is the Mechanism of Action of Unfractionated Heparin
What is it used for
What are things to be careful with use of UF
Side Effects
Indirect Thrombin Inhibitor
Need to monitor platelets, aPTT
Reversible by lowering dose or stopping Heparin
If need fast reversal give Protamine
Used for DVT prophylaxis, Systemic Anticoagulation
SE: Bleeding/Hemorrhage, Heparin-Induced Thrombocytopenia
What are examples of Low Molecular Weight Heparin
What is the Mechanism of Action of Low Molecular Weight Heparin
What is it used for
What are things to be careful with use of LMWH
Side Effects
Enoxaparin, Dalteparin
Inactivates Factor 10
No need to measure PT/PTT
If need fast reversible give Protamine
Used for DVT Prophylaxis and DVT/PE treatment, Acute Coronary Syndrome
SE: Pain at injection site, Hemorrhage (less so than with Heparin), Thrombocytopenia (less so than with Heparin)
Enoxaparin is Category B in pregnancy - so ok to use!
What are examples of HMG-COA Reductase Inhibitors
What is the MOA
What is it used for
What are side Effects
STATINS! Atorvastatin, Simvastatin
Inhibit HMG-COA Reducate which in turn leads to DECREASED SERUM LDL
Used for High LDL (usually >190), pts at risk like DM, AMI
SE: Myalgias that can lead to Myopathy, Hepatotoxicity, Increased blood glucose
CATEGORY X IN PREGNANCY
What are examples of Fibrates
What is the MOA
What is it used for
What are side Effects
Gemfibrozil, Fenofibrate
Used for high Triglycerides
SE: Hepatotoxicity, Myopathy
What are examples of Niacin
What is the MOA
What is it used for
What are side Effects
Nicotinic Acid, Nicotinamide
Used to lower LDL, increases HDL, lowers TRG
SE: Flushing, Hepatotoxic,
What are important interactions to watch for with Anti-Arrhythmics
Avoid other QT prolongators like Macrolides
Metabolized by CYP3A4 or 2D6
Careful with drugs that cause hyopkalemia/hypomagnesemia
What are important side effects with Anti-Arrhythmics
QT Prolongation
Careful use in patients with bradycardia and heart blocks
What are Class I Anti-Arrhythmics
What do they do
Modulate or Block Sodium Channels
Quinidine, Procainamide, Lidocaine, Propafenone
What are Class II Anti-Arrhythmics
What do they do
Inhibit Sympathetic Activity
Beta-Blockers
What are Class III Anti-Arrhythmics
What do they do
Side Effects
Block Potassium Channels
Amiodarone
Side Effects: Bradycardia, AV Nodal Block, Thyroid Toxicity, Photosensitivity
What are Class IV Anti-Arrhythmics
What do they do
Side Effects
Block Calcium Channels
Verapamil, Diltiazem
SE: Hypotension, Bradycardia, Negative Ionotrope, Peripheral Edema, Headache, Constipation
What is Amiodarone used for
Life-Threatening Arrhythmias
Atrial Fibrilliation
Careful with use with other QT prolongating drugs
What id Diltiazem and Verapamil used for
Non-Dihydropyridine CALCIUM CHANNEL BLOCKERS
Used for SVT, A.Fib, HTN (especially in AA)
What is Digoxin
Side Effects
Rate Control in A.Fib
Used for Heart Failure Sx
SE: Rhythm distrubances (PVC), Yellow/Green or blurred vision
How do Loop Diuretics Work What is an example What are they used for Caution with SE
Furosemide
Interferes with Na/K exchange in ASCENDING Loop of Henle by inhibiting Na/K-ATPase
Used for Heart Failure or Acute Hypercalcemia
Caution with Hypotension or other anti-HTN, Digoxin and Lithium Toxicity
SE: Hypokaelmia, Orthostatic Hypotension, Glucose Intolerance, Hyperuricemia
How do Thiazides work What is an example What are they used for Caution with SE
Hydrochlorothiazide
Interferes with Na/K exchange in DISTAL Convoluted Tube by inhibiting Na/K-ATPase
Used for Essential HTN
Caution with Hypotension or other anti-HTN, Digoxin and Lithium Toxicity
SE: Hypokaelmia, Orthostatic Hypotension, Glucose Intolerance, Hyperuricemia
How do Potassium Sparing Diuretics work What is an example What are they used for Caution with SE
Spironolactone, Eplerenone, Amiloride
Used for Mineralcorticoid Excess (Primary Aldosteronism), HF, Hepatic Cirrhosis, Nephrotic Syndrome
Careful with use with drugs that retain Potassium like ACE/ARB
SE: Hyperkalemia, Teratogenic, Painful Gynecomastia, Decreased Libido
How do ACE-Inhibitors work What is an example What are they used for Caution with SE
Lisinopril, Enalapril
Vasodilates efferent nodules, which decreases glomerular pressure
Used for HTN, Systolic HF, DM and Chronic Kidney Disease
Careful with other meds that retain Potassium
SE: Cough, Hyperkaelmia, Angioedema, Birth Defects
DONT USE IN PREGNANCY
How do Angiotensin-II Receptor Blockers work What is an example What are they used for Caution with SE
Losartan, Valsartan
Used for HTN, Systolic HF, DM, and Chronic Kidney Disease
Careful with other meds that retain Potassium
SE: NO COUGH, Hyperkalemia, Angioedema, Birth Defects
How do Alpha-Adrenergic Blockers Work What is an example What are they used for Caution with SE
Prazosin, Terazosin, Doxazosin
Selective Alpha1 Blockers which leads to decreased arterial pressure by vasodilation
Used in HTN, BPH
Careful with hypotension and other vasodilating agents (nitrates)
SE: Postural Hypotension (titrate the drug), Sedation/Fatigue, Nasal Congestion
How do Beta-Blockers Work What is an example What are they used for Caution with SE
Competitive Inhibitors of Catecholamines at Beta-Receptors
Non-Beta1 Selective: Propranolol (can cause bronchospasms so careful with use in asthma, COPD)
Beta1-Selective: Metoprolol, Atenolol
Beta and Alpha Blockers: Cavedilol
Used for HTN, Angina, AMI, HF, A.Fib
Careful with use with CCB (additive effect)
SE: Bradycardia, Bronchospasms, Erectile Dysfunction, Exercise Intolerance
How do Calcium Channel Blockers Work What is an example What are they used for Caution with SE
Nifedipine, Amlodipine
Inhibit L-Type Calcium Channel which leads to Vasodilation
Used in HTN, Angina, Raynaud’s Phenomenon
Careful with hypotension and other anti-hypertensives and vasodilators
SE: Headache, Dizziness, Peripheral Edema
GINGIVAL HYPERPALSIA WITH NIFEDIPINE
What are examples of Short Acting Beta2-Agonists, how do they work
What are they used for
Side Effects
Albuterol, Levalbuterol
Used for asthma and COPD, they bronchodilate
SE: Tachycardia, Palpitations, Tremor
What are examples of Long Acting Beta2-Agonists, how do they work
What are they used for
Side Effects
Salmeterol, Formoterol
Maintenance meds for Asthma and COPD, they bronchodilate
Contraindicated as solo therapy in asthma
SE: Tachycardia, Palpitations, Tremor
What are examples of Short Acting Inhaled Anticholinergics and how do they work
What are they used for
Side Effects
Ipratropium (-ium drugs)
Used for COPD
SE: Dry mouth, Pharyngeal Irritation, urinary retenion, Increased Intraocular Pressure
Caution use in patients with Glaucoma and BPH
What are examples of Long Acting Inhaled Anticholinergics
What are they used for
Side Effects
Tiotropium (Spiriva), Aclindinium
Used for Bronchospasms associated with COPD
SE: Dry mouth, Pharyngeal Irritation, urinary retenion, Increased Intraocular Pressure
Caution use in patients with Glaucoma and BPH
What are examples of Inhaled Corticosteroids, how do they work
What are they used for
Side Effects
Fluticasone, Budesonide
1st line for persistent asthma
SE: Dyphonia, Thrush, Growth deceleration in kids
What are examples of Leukotriene Modifiers, how do they work
What are they used for
Side Effects
Zilueton, Montelukast
Used as adjunct or alternative to ICS in persistent asthma
SE: Neuropsychiatric effects with Montelukast (insomnia, agitation, anxiety, depression)
What is an example of Methylxanithines
What are they used for
Side Effects
Theophylline
Used for asthma and COPD but less so because of SE
SE: Many CYP interactions, Need to monitor levels