Author Question: A patient has allergies and takes an antihistamine. The patient wants to know how the drug works. ... (Read 135 times)

maychende · **on:** Jul 23, 2018

A patient has allergies and takes an antihistamine. The patient wants to know how the drug works. The nurse understands that antihistamines work because they are what?

a. Activators
b. Agonists
c. Antagonists
d. Antidotes

Question 2

A patient receiving botulinum toxin injections to control muscle spasticity asks how the drug works. The nurse knows that this drug affects the transmitter acetylcholine by:

a. inhibiting its release.
b. interfering with its storage.
c. preventing its reuptake.
d. promoting its synthesis.

duke02 · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

ANS: C
Antihistamines bind to receptors to prevent activation by histamine; this makes antihistamines antagonist drugs. Antihistamines do not activate receptors. Agonist drugs activate receptors; they are not antidotes.

Answer to Question 2

ANS: A
Acetylcholine is a neurotransmitter that activates receptors that increase skeletal muscle contraction. Botulinum toxin inhibits the release of this transmitter. It does not interfere with storage, reuptake, or synthesis of acetylcholine.