Adrenergic Agonists and Blockers

Question 1

Direct-action inotropic agent acting primarily on beta-1 adrenergic receptors in the heart, enhancing myocardial contractility and stroke volume. It leads to increased cardiac output without significantly raising heart rate or
peripheral vascular resistance

Answer 1

Dobutamine hydrochloride

Question 2

Short-term management of cardiac decompensation due to heart disease or surgery.

Answer 2

Dobutamine hydrochloride

Question 3

works by stimulating alpha-1 adrenergic receptors in the smooth muscle of the iris. This causes the muscle to contract, leading to the dilation of the pupil.

Answer 3

Phenylephrine

Question 4

is most commonly used to dilate the pupil before retinal examination, fundus photography,tonometr y (measuring intraocular pressure), and other ophthalmic procedures.

Answer 4

Phenylephrine

Question 5

is a non-depolarizing neuromuscular blocker that competes with acetylcholine at nicotinic receptors in the motor endplate, preventing depolarization of skeletal muscles and resulting in muscle paralysis.

Answer 5

Pancuronium

Question 6

Skeletal muscle relaxation during surgery

Answer 6

Pancuronium

Question 7

acts on alpha-adrenergic receptors to cause vasoconstriction, increasing blood pressure, and on beta-adrenergic receptors to enhance cardiac output, stabilizing circulation in hypotensive states.

Answer 7

Norepinephrine

Question 8

stimulates dopaminergic, alpha, and beta receptors of the sympathetic nervous system, resulting in positive inotropic effects and increased cardiac output. action is dose-related; large doses can cause mainly alpha stimulation.

Answer 8

Dopamine Hydrochloride

Question 9

to treat shock and correct hemodynamic imbalances; to improve perfusion to vital organs; to increase cardiac output; to treat hypotension

Answer 9

Dopamine Hydrochloride