Final answer:
The effectiveness of naloxone (Narcan) can be determined by assessing certain client data such as respiratory rate, pupil size, level of consciousness, and blood pressure.
Step-by-step explanation:
Effective use of naloxone (Narcan) can be determined by the assessment of certain client data. One key indicator is an increased respiratory rate. Naloxone works by reversing the respiratory depression caused by opioid overdose, so an improvement in the client's breathing would indicate that the naloxone has been effective.
Other assessment data that would indicate the effectiveness of naloxone include pupils returning to normal (dilated) size, a decreased level of consciousness (although this could also be due to other factors), and a decrease in blood pressure.