USMLE First Aid 2013 Pharm w/antibios Flashcards
Nitrates (mechanism, use, toxicity)
Cause NO release -> vasodilation (veins >>> arteries); used in angina; fast tolerance, hypotension, flushing, headache Pharmacology Cardio
Adverse effects of statins
Hepatoxicity and muscle breakdown Pharmacology Cardio
Niacin (mechanism, use, toxicity)
Inhibits lipolysis and reduces VLDL secretion, lowering LDL and raising HDL; hyperlipidemia; flushing and hyperuricemia Pharmacology Cardio
Cholestyramine, colestipol, colesevelam (mechanism, use, toxicity)
Inhibits reabsorption of bile acids -> lower LDL with slight increase in HDL; unpigmented gallbladder stones and malabsorption Pharmacology Cardio
Ezetimibe
Prevents cholesterol reabsorption -> lower LDL Pharmacology Cardio
Fibrates (gemfibrozil + -fibrates) (mechanism, use, toxicity)
Upregulates LPL -> lower triglycerides, slightly inc. HDL and slightly dec. LDL; myositis and hepatoxicity Pharmacology Cardio
Digoxin and digitoxin (mechanism, use, toxicity)
Inhibits Na/K ATPase -> indirectly inhibits Na/Ca exchanger -> inc. calcium levels -> inc. contractility; stimulates the vagus; causes cholinergic symptoms and hyperkalemia Pharmacology Cardio
Class 1A antiarrhythmics
Quinidine, procainamide, and disopyramide; inc. AP duration and QT interval; can cause torsades de pointes, cinchonism (qunidine), procainamide (drug-induced lupus) Pharmacology Cardio
Class 1B antiarrhythmics
Lidocaine, mexiletine, and tocainide; dec. AP duration especially in depolarized/ischemia tissue; best following MI Pharmacology Cardio
Class 1C antiarrhythmics
Flecainide, propafenone; no effect on AP, used in ventricular tachycardias; do not use post-MI due to risk for arrhythmias Pharmacology Cardio
Class 1 antiarrhythmics (general mechanism and toxicity)
Blocks Na channels, decreasing the slope of phase 0 depolarization; toxicity exacerbated by hyperkalemia Pharmacology Cardio
Class 2 antiarrhythmics
Beta-blockers; reduces cAMP, slowing SA and AV node activity, increases PR interval; adverse effects include impotence, asthma exacerbation, sedation Pharmacology Cardio
Class 3 antiarrhythmics
Amiodarone, ibutilide, dofetilide, sotalol; K channel blockers; inc. AP duration and QT interval Pharmacology Cardio
Toxicity of amiodarone
Pulmonary fibrosis, hepatotoxicity, thyroid dysfunction Pharmacology Cardio
Class 4 antiarrhythmics
Ca channel blockers; verapamil and diltiazem; dec. conduction velocity and inc. PR interval; cause constipation, flushing, and edema Pharmacology Cardio
Adeosine (mechanism, use, toxicity)
Inc. K efflux, hyperpolarizing the cell; used in supraventricular tachycardias; can cause flushing, hypotension, and chest pain Pharmacology Cardio
Magnseium (mechanism, use, toxicity)
Used in torsades de pointes and digoxin toxicity Pharmacology Cardio
Treatment for prolactinoma
Bromocriptine or cabergoline (dopamine agonists) Pharmacology Endocrine
Treatment of secondary hyperaldosteronism
Spironolactone (or other AT2 antagonist) Pharmacology Endocrine
Treatment of carcinoid syndrome
Octreotide (somatostatin analogues) Pharmacology Endocrine
Rapid-acting insulins (3)
Lispro, aspart, and glulisine Pharmacology Endocrine
Short-acting insulin (1)
Regular Pharmacology Endocrine
Intermediate-acting insulin (1)
NPH Pharmacology Endocrine
Long-acting insulins (2)
Glargine and detemir Pharmacology Endocrine