Ans9

Question 1

Phenoxybenzamine

Answer 1

α-Adrenergic blocking agents

nonselective, noncompetitive blocker
prevents vasoconstriction

unsuccessful in maintaining lowered
blood pressure in hypertension

Question 2

Phenoxybenzamine treat

Answer 2

treatment of sweating and hypertension associated with pheochromocytoma
Raynaud disease
frostbite

Question 3

Phenoxybenzamine Adverse effects

Answer 3

postural hypotension, nasal stuffiness, nausea, and
vomiting

inhibit ejaculation

cardiac arrhythmias and anginal pain

reflex tachycardia

Question 4

Yohimbine

Answer 4

selective competitive α2-blocker

increase sympathetic
treatment of erectile
dysfunction not recommended

Question 5

Prazosin, terazosin, and doxazosin

Answer 5

selective competitive blockers of
the α1b receptor

treatment of hypertension

Question 6

Tamsulosin and alfuzosin and silodosin

Answer 6

treatment of benign prostatic hyperplasia
(BPH).

decreases tone in the smooth muscle of
the bladder neck and prostate and improves urine flow.

more selective for α1A receptors in the prostate and
bladder

Question 7

Adverse effects α1-Blockers

Answer 7

dizziness lack of energy, nasal congestion, headache,
drowsiness, and orthostatic hypotension

floppy iris syndrome

Question 8

Phentolamine

Answer 8

competitive block of α1 and α2

4 hours after a single injection

diagnosis and short-term management of
pheochromocytoma

prevent dermal necrosis