Certified Paraoptometric (CPO) Practice Exam 2025

How long does it take for Atropine to begin its effect?

1. 30-45 minutes

2. 45-120 minutes

3. 2-3 hours

4. 3-5 hours

The correct answer is: 45-120 minutes

Atropine typically begins to take effect within a timeframe of 30 to 45 minutes after administration, particularly when used in the context of eye care to dilate pupils. This onset is critical in various ophthalmic procedures, allowing practitioners to prepare for examinations or treatments. The duration and timing of drug effects vary based on administration method (topical, systemic) and patient factors. For atropine, once it is in the system, observable effects like pupil dilation and changes in accommodation manifest relatively quickly. Therefore, an understanding of this rapid onset is essential for effective clinical practice, especially in instances that necessitate immediate visual assessment.