Author Question: A nursing instructor is educating a class on the pharmacodynamics of psychiatric medications. The ... (Read 31 times)

lracut11 · **on:** Jul 19, 2018

A nursing instructor is educating a class on the pharmacodynamics of psychiatric medications. The instructor determines that additional education is needed when the students identify which of the following as a site of action?

A) Receptor
B) Ion channels
C) Neurotransmitters
D) Enzymes

Question 2

A nurse is working as part of a team involved with the testing of a new psychiatric medication. The drug is currently being used in multiple clinical trials at various different sites. The nurse is engaged in which phase of testing?

A) Phase I
B) Phase II
C) Phase III
D) Phase IV

katieost · **Reply #1 on:** Jul 19, 2018

Answer to Question 1

Ans: C
Psychiatric medications primarily target the central nervous system at the cellular synaptic level at four sites: receptors, ion channels, enzymes, and carrier proteins. Receptors respond to neurotransmitters, but neurotransmitters are not a site of action of medications.

Answer to Question 2

Ans: C
Phase III of new drug testing involves extensive clinical trials conducted at multiple sites throughout the country with large numbers of clients. This phase concludes with a new drug application being submitted to the U.S. Food and Drug Administration (FDA). Phase I testing defines the range of dosages tolerated in healthy individuals. Phase II testing studies the effects of the drug in a limited number of persons with the disorder, and defines a range of clinically effective dosages. Phase IV involves drug studies that continue after FDA approval to detect new or rare adverse reactions and potentially new indications.