Pharmacology MCQs

Competitive antagonist is a reversible receptor blocker whose effect can be overcome by increasing agonist concentration.

Half-life is the time required for the plasma concentration of a drug to fall by one half.

Therapeutic index is a measure comparing toxic and effective doses and indicating a drug safety margin.

Loading dose is an initial larger dose used to achieve a target concentration rapidly.

ACE inhibitor is a drug class that reduces angiotensin II formation and may cause cough or hyperkalaemia.

Beta blocker is a drug class that antagonises beta-adrenergic receptors and can reduce heart rate.

Agonist is a ligand that binds to a receptor and activates it to produce a biological response.

Competitive antagonist is a reversible receptor blocker whose effect can be overcome by increasing agonist concentration.

First-pass metabolism is presystemic metabolism that reduces oral bioavailability before a drug reaches systemic circulation.

Half-life is the time required for the plasma concentration of a drug to fall by one half.

Therapeutic index is a measure comparing toxic and effective doses and indicating a drug safety margin.

Loading dose is an initial larger dose used to achieve a target concentration rapidly.