Antimigraine agents act by: 1. blocking parasympathetic nerve ...

[saraeharris]

Antimigraine agents act by:
 
  1. blocking parasympathetic nerve impulses.
  2. increasing cerebral blood flow.
  3. constricting dilated cerebral arteries.
  4. exerting a sympathomimetic effect.

Question 2

Phenobarbital is a classic example of:
 
  A. an inducing agent.
  B. an inhibitor.
  C. an active secretant.
  D. a competing agent.

[JaynaD87]

Answer to Question 1

3
Adrenergic-blocking agents dilate the veins in smooth-muscle tissue in the peripheral vascular system and the uterus. This reduces cerebral blood flow and arterial pulsing, which reduces the headache pain.

Answer to Question 2

A

[saraeharris]

Thanks for the timely response, appreciate it

[debra928]

Excellent