Mechanism of action: prazosin ()( ) A: alpha-1 receptor blocker B: beta receptor blocker C: phosphodiesterase inhibitor D: calcium channel blocker

c) When administration of a proton-pump inhibitor or an H2-receptor blocker produces an immediate increase in gastric pH but ulcer healing that is delayed, because _______.

A drug combine with the receptors and show its effects, the drug is called A: partial agonist B: agonist C: noncompetitive antagonist D: competitive antagonist E: blocker

Which one of the sentence is INCORRECT for Prazosin? A: It is a selective α1 adrenoceptor blocker. B: It blocks presynaptic α2 adrenoceptors to increase release of noradrenaline. C: It has first dose of effect, showing postural hypotension. D: It dilates resistance and capacitance vessels. E: It can decrease the blood cholesterol concentrations.

Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.