USMLE Step 3 Drug MOA Practice Test

These questions are part of the practice quiz. Start practicing

• Which receptor does morphine primarily act upon to provide analgesia?
• How do antimalarial drugs like chloroquine function against malaria parasites?
• Haloperidol and fluphenazine belong to which category of medications?
• How does clopidogrel exert its effects?
• How does albuterol act as a bronchodilator?
• What is the mechanism of action of calcium channel blockers like amlodipine?
• What is the primary action of spironolactone?
• What is the mechanism of action of beta-blockers?
• Which class of drugs is represented by compounds that start with -lol from A to M?
• What does acetazolamide inhibit?
• How do statins affect cholesterol biosynthesis in the liver?
• What is the action of -dronate compounds?
• Which enzyme does trimethoprim inhibit?
• What is the action of benzathine penicillin in bacterial infections?
• Streptokinase and tPA share which mechanism of action?
• What is the action of metformin in the management of type 2 diabetes?
• What happens to the intracellular calcium levels when digoxin acts on its target?
• How do selective alpha-1 blockers like prazosin work?
• Which of the following statements about clopidogrel is accurate?
• What effect do cholecystokinin analogs have on digestive function?
• What type of receptor does phenylephrine primarily target?
• What type of receptors do abciximab target to exert its anti-platelet effects?
• What is the clinical effect of using glucocorticoids in inflammatory conditions?
• How does guanfacine function as an antihypertensive?
• What is the primary effect of verapamil on the cardiovascular system?
• What is the mechanism of action of lamotrigine in treating epilepsy?
• How do inhaled corticosteroids like fluticasone act in the management of asthma?
• What is the mechanism of action of ACE inhibitors in hypertension?
• What is the mechanism of action of selective serotonin reuptake inhibitors (SSRIs)?
• How do ACE inhibitors affect renal function in patients with renal artery stenosis?
• In what way does tamoxifen function in breast cancer treatment?
• What characteristic distinguishes calcium channel blockers from other classes of antihypertensives?
• Which of the following best describes potassium-sparing diuretics?
• What is the mechanism of action of warfarin?
• How do antipsychotics like olanzapine modulate neurotransmission?
• How does trastuzumab exert its effect on breast cancer cells?
• How does ketoconazole work as an antifungal agent?
• What is the main therapeutic action of phenylephrine?
• How do statins, such as atorvastatin, work to lower cholesterol levels?
• Which of the following is a primary use for digoxin immune Fab?
• What is the mechanism of action of the anticoagulant apixaban?
• What is one of the actions of valproic acid?
• What is the mechanism of action for the anticoagulant dabigatran?
• Describe how nitrates relieve angina.
• How do diuretics typically affect potassium levels?
• What is the primary mechanism of action of β blockers in the treatment of hypertension and angina?
• At what dose does dopamine exhibit β1 and β2 agonist activity?
• How does sertraline function therapeutically?
• What is the primary mechanism by which clopidogrel exerts its antiplatelet effect?
• What is the MOA of alteplase in treating thromboembolism?
• What is the action of isoniazid in tuberculosis treatment?
• What is the mechanism of action of benzodiazepines?
• What is the mechanism of action of heparin in anticoagulation therapy?
• Ampicillin and amoxicillin differ from penicillin primarily by their what?
• What is the action of carbamazepine in relation to neuronal excitability?
• What effect does atropine have on the heart?
• Which of the following is a characteristic of opioid use?
• What therapeutic use does colchicine primarily have?
• Infliximab and adalimumab inhibit which cytokine to treat autoimmune conditions?
• How do beta-blockers like metoprolol exert their therapeutic effects?
• How do monoclonal antibodies like trastuzumab function in cancer therapy?
• How do proton pump inhibitors like omeprazole reduce gastric acid secretion?
• What is the primary action of morphine on presynaptic nerve terminals?
• What do fluoroquinolones primarily inhibit in bacterial cells?
• What is the mechanism of action of metronidazole?
• Which of the following best describes the action of SGLT2 inhibitors?
• Ticarcillin and piperacillin are known for which of the following properties?
• What is the primary mechanism by which acyclovir works as an antiviral agent?
• What cellular effect does the inhibition of dihydrofolate reductase have on bacteria?
• Which drug is primarily used for its analgesic effects and is a reversible COX inhibitor?
• How does the mechanism of action of benzodiazepines contribute to their anxiolytic effects?
• What class of antibiotics are cephalosporins and how do they relate to penicillin?
• What is the primary action of lamotrigine as an antiepileptic drug?
• What is the key therapeutic action of GLP-1 agonists related to gastric function?
• What is the mechanism of action of digoxin in heart failure?
• What is the effect of ipratropium as a treatment for asthma?
• What effect does acetaminophen have on COX enzymes?
• How do monoclonal antibodies like trastuzumab work in cancer treatment?
• How do antacids relieve heartburn?
• What is the mechanism of action of colchicine in gout management?
• Vancomycin works by interfering with what aspect of bacterial cell wall synthesis?
• How do angiotensin receptor blockers (ARBs) exert their effects?
• What is the mechanism of action of clopidogrel as an antiplatelet drug?
• Which class of drugs do albuterol and salmeterol belong to?
• What is one of the key actions of beta-lactam antibiotics like penicillin?
• What is the action of the antiviral drug oseltamivir in influenza therapy?
• How does levodopa enhance dopaminergic activity in Parkinson's disease?
• What is the mechanism of action of tamoxifen in breast cancer treatment?
• Which of the following is a treatment for benign prostatic hyperplasia (BPH) by decreasing DHT?
• What is the mechanism of action of aspirin in cardiovascular therapy?
• What is the mechanism of action of the antihistamine loratadine?
• Linezolid is known to inhibit protein synthesis by acting on which ribosomal subunit?
• How do statins help in lowering cholesterol levels?
• What is a primary effect of statins on cardiovascular risk?
• How does fluorouracil work as a chemotherapy agent?
• What is the action of dabigatran as an anticoagulant?
• Aminoglycosides have a specific mechanism that affects which stage of translation?
• What effect does nitroglycerin have on preload?
• How does methotrexate exert its therapeutic effect?
• Which drug would be prescribed as a beta-lactamase inhibitor to protect beta-lactam antibiotics?
• What is the mechanism of action of corticosteroids in reducing inflammation?
• What is the mechanism of action of Diphenhydramine (Benadryl)?
• Which antibiotic is effective by binding to the D-ala-D-ala portion of bacterial cell wall precursors?
• How do proton pump inhibitors (PPIs) exert their effect?
• What is the primary action of warfarin in blood coagulation?
• What is the effect of antiarrhythmic drugs on cardiac action potentials?
• What is the mechanism of action of monoclonal antibodies in cancer therapy?
• What is the mechanism of nitroglycerin in managing angina?
• Which ribosomal subunit does clindamycin act on and how does it affect protein synthesis?
• The mechanism of action for 5HT-2 antagonists primarily involves what type of action?
• What is the mechanism of action for opioids?
• What does finasteride inhibit?
• What is the role of PD-1 inhibitors in cancer immunotherapy?
• What activity does spironolactone promote in the kidneys?
• How do leukotriene receptor antagonists work?
• How do anti-HIV integrase inhibitors like dolutegravir function?
• Which class of drugs is primarily used to decrease aqueous humor secretion in glaucoma?
• Chloramphenicol's mechanism of action involves inhibition of which enzymatic activity?
• How does digoxin primarily enhance contractility in heart failure?
• How do thiazide diuretics such as hydrochlorothiazide function?
• What is the primary mechanism of action of fibrates?
• What class of drugs includes clavulanic acid, sulbactam, and tazobactam?
• What is the mechanism of action of fibrates in lipid management?
• What does esomeprazole do in the management of GERD?
• What is the mechanism of action of ibuprofen?
• Which receptors do opioids primarily bind to for their analgesic effect?
• How do leukotriene receptor antagonists benefit asthma patients?
• What is the mechanism of action of theophylline?
• How does levothyroxine function in hypothyroidism treatment?
• Which of the following is NOT a characteristic of corticosteroids like prednisone?
• Which of the following is classified as a low-potency D2 antagonist?
• How do antifolate drugs like methotrexate work?
• What is the mechanism of action of rifampin?
• What does the mechanism of potassium-sparing diuretics prevent?
• How does aspirin function as an antiplatelet agent?
• How do β2 agonists like albuterol function in the treatment of asthma?
• What role does digoxin play in treating heart failure?
• Which drug mechanism involves the conversion to nitric oxide for therapeutic effect?
• What effect do calcium channel blockers like verapamil have on the heart?
• How do SGLT2 inhibitors lower blood glucose levels?
• What is the effect of ACE inhibitors on the renin-angiotensin system?
• Which of the following best describes the action of dobutamine?
• What is the primary effect of statins on cholesterol levels?
• What enzyme does allopurinol inhibit?
• How do corticosteroids affect the immune system?
• What role does ceruletide play in digestion?
• What is one of the effects of statins on atherosclerosis besides lowering LDL cholesterol?
• How is acyclovir activated in the body?
• Which of the following drugs is a HMG-CoA reductase inhibitor?
• What is the primary function of potassium-sparing diuretics?
• What is the effect of amiodarone on cardiac action potential?
• How do benzodiazepines like diazepam exert their anxiolytic effects?
• What key effect do statins have on LDL receptors?
• What role does IL-2 play in immune response?
• What role does interleukin-2 play in T-cell activation that is inhibited by cyclosporine?
• What type of antibiotic is primarily known for blocking initiation of translation?
• Identify the mechanism of action of insulin.
• What is the main therapeutic use of drugs that act on the IIb/IIIa receptors?
• What is the primary function of tamoxifen?
• In the treatment of HER-2 over-expressing breast cancer, which drug is used to target erb-B2?
• What is the primary result of aspirin's action on cyclooxygenase (COX)?
• What limits the efficacy of warfarin as an anticoagulant?
• What is the primary action of histamine H2 receptor antagonists?
• What is the mechanism of action of lidocaine and benzocaine?
• How do nucleoside reverse transcriptase inhibitors (NRTIs) function in HIV treatment?
• What additional effect can cholecystokinin have besides stimulating digestion?
• What is the action of the immunosuppressant cyclosporine?
• What is the primary class of the drugs clozapine, risperidone, olanzapine, and quetiapine?
• What is a primary mechanism of action of corticosteroids such as beclomethasone and prednisone?
• How does rifampin function in the treatment of tuberculosis?
• Which mechanism is utilized by valproic acid for managing seizures?
• How do antipsychotics like risperidone exert their effects?
• What is the mechanism of action of the antidepressant sertraline?
• What unique mechanism do calcium channel blockers utilize compared to other antihypertensive agents?
• What is the primary effect of statins in cardiovascular treatment?
• What is the mechanism of action of the beta-lactam antibiotic cephalexin?
• What is the mechanism of action of buspirone in anxiety treatment?
• What is the function of mRNA vaccines in the immune response?
• Which drug class decreases the synthesis of thymidylate and purine nucleotides?
• What pharmacological action does phenoxybenzamine provide in pheochromocytoma treatment?
• What is the main mechanism of action of digoxin?
• What is the mechanism of action of ACE inhibitors such as lisinopril?
• Which drug is known to act as a competitive antagonist at D2 dopamine receptors?
• What condition do statins primarily treat?
• What is the primary action of tetracycline in bacterial protein synthesis?
• How do GLP-1 agonists enhance glycemic control in diabetes management?
• What is the mechanism of action of nitrates such as nitroglycerin in angina treatment?
• What is the mechanism of action of ribavirin in combating viral infections?
• How do opioid analgesics such as morphine achieve pain relief?
• In addition to lowering blood glucose levels, what is another effect of metformin?
• What is the mechanism of action of erythromycin?
• How do fibroblast growth factor inhibitors like gefitinib function in cancer therapy?
• What is the action of NSAIDs on COX enzymes?
• Which of the following best describes the action of clomiphene in treating female infertility?
• Ondansetron acts as an antagonist primarily at which receptor to help control vomiting?
• What is the mechanism of action of loop diuretics such as furosemide?
• What is a key feature of the action of ARBs?
• What is the mechanism of action of sodium-glucose co-transporter 2 (SGLT2) inhibitors like empagliflozin?
• Describe the mechanism of action of amiodarone.
• What mechanism do thiazolidinediones use to manage diabetes?
• Which effect is NOT associated with β blockers?
• At high doses, what type of receptor agonist activity does dopamine exhibit?
• What is the mechanism of action for the anticonvulsant carbamazepine?
• What is the mechanism of action of aspirin as an antiplatelet agent?
• Which antibiotic class primarily targets the 30S ribosomal subunit to inhibit protein synthesis?
• What is the mechanism of action of fondaparinux as an anticoagulant?
• How does metformin contribute to lowering blood glucose levels?
• Which drug is used to manage osteoporosis by inhibiting bone resorption?
• How does warfarin exert its anticoagulant effect?
• What is a noted effect of dopamine at low doses?
• How does the anticoagulant rivaroxaban function in blood coagulation?
• What is the MOA of azathioprine in immunosuppression?
• What is the primary mechanism of action of metformin?
• What is the mechanism of action of the muscle relaxant baclofen?
• What is the mechanism of action of loop diuretics?
• What is a common feature of beta-lactam antibiotics?
• What type of antagonists are carvedilol and labetalol?
• What effect does spironolactone have on sodium in the kidneys?
• How do beta-blockers function in myocardial infarction management?
• How do antiarrhythmic drugs like amiodarone exert their effects?
• What is the mechanism of action of penicillin?
• What is the mechanism of action of ACE inhibitors?
• How does isoniazid exert its anti-mycobacterial effects?