# A client prescribed more than 200 units of insulin daily is due for Humulin R U-500 150 units subcutaneously using the dedicated KwikPen. The nurse performs the final check shown. Click the component that must be corrected before administration.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=581185&lang=en  
> language: en  
> subject: Pharmacological and Parenteral Therapies  
> category: PPT

## Question

A client prescribed more than 200 units of insulin daily is due for Humulin R U-500 150 units subcutaneously using the dedicated KwikPen. The nurse performs the final check shown. Click the component that must be corrected before administration.

![](https://mymerci.kr/data/nclex/hotspot/regen_20260908_2350/HSR522.svg)

## Explanation

C must read 150 units. The dedicated pen window displays actual insulin units and requires no dose conversion.

## In-depth explanation

Quick answer
C. C must read 150 units. The dedicated pen window displays actual insulin units and requires no dose conversion.
Why this is the best choice
The U-500 concentration does not mean dividing the ordered unit dose by five on this pen. A displayed 30 would deliver 30 units, an underdose relative to the 150-unit prescription. Use the prescribed unit setting and follow the device instructions; do not withdraw insulin from the pen into a syringe.
Clinical picture
The observations are fictional teaching data. Apply the stated context; the selected feature does not by itself replace a complete bedside assessment.
Memory hook
A dedicated U-500 pen displays the actual number of units to inject.
Decision rule
A dedicated U-500 pen displays the actual number of units to inject.
Why the other regions do not fit
A is the prescribed U-500 product. B records appropriate appearance, expiry and single-patient assignment. D is a newly attached pen needle. None of these resolves the incorrectly dialed dose.
**Sources**
- The KwikPen dose window shows actual U-500 units; no dose conversion is required.

## Key concepts

- **U-500 pen units versus a concentration-conversion error** — A dedicated U-500 pen displays the actual number of units to inject.
- **Comparison with context** — The concentration label may tempt a fivefold conversion, but the device already meters actual units.

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