Certified Paraoptometric (CPO) Practice Exam 2025 - Free Paraoptometric Practice Questions and Study Guide

Question: 1 / 420

What is the onset time for Phenylephrine?

10-20 minutes

20-30 minutes

30-60 minutes

Phenylephrine is a sympathomimetic drug commonly used as a decongestant or to dilate pupils during eye examinations. The onset time of a medication refers to how quickly it begins to take effect after administration. In the case of phenylephrine, particularly when used for pupil dilation in ophthalmic applications, the onset of action typically occurs within 30 to 60 minutes. This time frame allows for the medication to take effect and produce the desired physiological result, such as mydriasis (pupil dilation).

The 30-60 minutes onset period is significant because it helps practitioners plan for diagnostic procedures or treatments, ensuring that adequate time is allowed for the medication to work before assessing its effects. Understanding the pharmacokinetics of phenylephrine and its onset time is essential for ensuring effective patient care in optometric practices.

Get further explanation with Examzify DeepDiveBeta

60-90 minutes

Next Question

Report this question

Download Certified Paraoptometric (CPO) Practice Exam 2025 PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy