Pharmacology Drug Classifications and Prototypes 3 — Questions and Answers
Question 1: Captopril is the prototype of which antihypertensive drug class?
- Angiotensin receptor blockers (ARBs)
- ACE inhibitors (Correct answer)
- Direct renin inhibitors
- Beta-blockers
Correct answer: ACE inhibitors
Captopril is the prototype ACE inhibitor, blocking conversion of angiotensin I to angiotensin II to lower blood pressure.
Question 2: Which benzodiazepine is considered the prototype of its drug class?
- Alprazolam
- Lorazepam
- Diazepam (Correct answer)
- Triazolam
Correct answer: Diazepam
Diazepam (Valium) is the prototype benzodiazepine, enhancing GABA-A receptor activity to produce anxiolytic, sedative, and anticonvulsant effects.
Question 3: Ibuprofen is categorized as a prototype non-selective NSAID. What is its primary mechanism?
- Selective COX-2 inhibition
- Non-selective COX-1 and COX-2 inhibition (Correct answer)
- Opioid receptor agonism
- Phospholipase A2 inhibition
Correct answer: Non-selective COX-1 and COX-2 inhibition
Ibuprofen non-selectively inhibits both COX-1 and COX-2 enzymes, reducing prostaglandin synthesis to produce anti-inflammatory and analgesic effects.
Question 4: Atropine is the prototype drug of which class?
- Cholinergic agonists
- Anticholinergic (muscarinic antagonist) agents (Correct answer)
- Alpha-1 adrenergic antagonists
- Ganglionic blockers
Correct answer: Anticholinergic (muscarinic antagonist) agents
Atropine is the prototype anticholinergic agent, competitively blocking muscarinic receptors to increase heart rate and decrease secretions.
Question 5: Which drug is the prototype tetracycline antibiotic?
- Doxycycline
- Minocycline
- Tetracycline (Correct answer)
- Tigecycline
Correct answer: Tetracycline
Tetracycline is the prototype of the tetracycline class, inhibiting bacterial protein synthesis by binding to the 30S ribosomal subunit.
Question 6: Lovastatin is the prototype of which lipid-lowering drug class?
- Fibrates
- Bile acid sequestrants
- HMG-CoA reductase inhibitors (statins) (Correct answer)
- Cholesterol absorption inhibitors
Correct answer: HMG-CoA reductase inhibitors (statins)
Lovastatin is the prototype statin (HMG-CoA reductase inhibitor), reducing hepatic cholesterol synthesis and lowering LDL levels.
Question 7: Neostigmine is the prototype of which drug class?
- Irreversible cholinesterase inhibitors
- Reversible cholinesterase inhibitors (Correct answer)
- Nicotinic receptor antagonists
- Muscarinic receptor agonists
Correct answer: Reversible cholinesterase inhibitors
Neostigmine is the prototype reversible cholinesterase inhibitor, preventing acetylcholine breakdown to enhance cholinergic neurotransmission.
Pharmacology Drug Classifications and Prototypes 3
Captopril is the prototype of which antihypertensive drug class?