|
Related Questions |
View Answer |
|
Which of the following sympathomimetics is used in the therapy of bronchial asthma?
Formoterol Norepinephrine Methoxamine Dobutamine
|
View Answer
|
|
Indicate the agent of choice in the emergency therapy of anaphylactic shock:
Methoxamine Terbutaline Norepinephrine Epinephrine
|
View Answer
|
|
Which of the following sympathomimetics is an effective mydriatic?
Salmeterol Phenylephrine Dobutamine Norepinephrine
|
View Answer
|
|
The adverse effects of sympathomimetics include all of the following EXCEPT:
Drug-induced parkinsonism Cerebral hemorrhage or pulmonary edema Myocardial infarction Ventricular arrhythmias
|
View Answer
|
|
Indicate the irreversible alfa receptor antagonist:
Tolazoline Labetalol Prazosin Phenoxybenzamine
|
View Answer
|
|
Which of the following drugs is an nonselective beta receptor antagonist?
Metoprolol Atenolol Propranolol Acebutolol
|
View Answer
|
|
Indicate the beta1-selective antagonist:
Propranolol Metoprolol Carvedilol Sotalol
|
View Answer
|
|
Which of the following agents is a beta2–selective antagonist?
Tolazolin Pindolol Ergotamin Butoxamine
|
View Answer
|
|
Indicate the beta adrenoreceptor antagonist, which has partial beta–agonist activity:
Propranolol Metoprolol Pindolol Betaxolol
|
View Answer
|
|
Which of the following drugs is a reversible nonselective alfa, beta antagonist?
Labetalol Phentolamine Metoprolol Propranolol
|
View Answer
|
|
Indicate the indirect-acting adrenoreceptor blocking drug:
Tolazoline Reserpine Carvedilol Prazosin
|
View Answer
|
|
The principal mechanism of action of adrenoreceptor antagonists is:
Reversible or irreversible interaction with adrenoreceptors Depletion of the storage of catecholamines Blockade of the amine reuptake pumps Nonselective MAO inhibition
|
View Answer
|
|
Characteristics of alfa-receptor antagonists include all of the following EXCEPT:
They cause a fall in peripheral resistance and blood pressure They cause epinephrine reversal (convert a pressor response to a depressor response) Bronchospasm They may cause postural hypotension and reflex tachycardia
|
View Answer
|
|
Which of the following drugs is an imidazoline derivative and a potent competitive antagonist at both alfa1 and alfa2 receptors?
Prazosin Labetalol Phenoxybenzamine Phentolamine
|
View Answer
|
|
Characteristics of phentolamine include all of the following EXCEPT:
Reduction in peripheral resistance Stimulation of responses to serotonin Tachycardia Stimulation of muscarinic, H1 and H2 histamine receptors
|
View Answer
|
|
The principal mechanism of phentolamine-induced tachycardia is:
Antagonism of presynaptic alfa2 receptors enhances norepinephrine release, which causes cardiac stimulation via unblocked beta receptors Baroreflex mechanism Direct effect on the heart by stimulation of beta1 receptors Inhibition of transmitter reuptake at noradrenergic synapses
|
View Answer
|
|
Nonselective alfa-receptor antagonists are most useful in the treatment of:
Asthma Cardiac arrhythmias Pheochromocytoma Chronic hypertension
|
View Answer
|
|
The main reason for using alfa-receptor antagonists in the management of pheochromocytoma is:
Inhibition of the release of epinephrine from the adrenal medulla Blockade of alfa2 receptors on vascular smooth muscle results in epinephrine stimulation of unblocked alfa2 receptors Direct interaction with and inhibition of beta2 adrenoreceptors Antagonism to the release of rennin
|
View Answer
|
|
Which of the following drugs is useful in the treatment of pheochromocytoma?
Phenylephrine Propranolol Phentolamine Epinephrine
|
View Answer
|
|
Indicate adrenoreceptor antagonist agents, which are used for the management of pheochromocytoma:
Selective beta2-receptor antagonists Nonselective beta-receptor antagonists Indirect-acting adrenoreceptor antagonist drugs ?lfa-receptor antagonists
|
View Answer
|