# A client recently started lamotrigine while taking valproate and now has a spreading rash, fever, and painful mouth ulcers. Which action is best?

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=522096&lang=en  
> language: en  
> subject: Adverse Effects/Contraindications/Interactions  
> category: PPT

## Question

A client recently started lamotrigine while taking valproate and now has a spreading rash, fever, and painful mouth ulcers. Which action is best?

## Option

1. Apply moisturizer and take the next dose because early rashes are always benign.
2. Hold lamotrigine and obtain urgent evaluation for a serious cutaneous reaction. **✔ Correct answer**
3. Double lamotrigine to prevent withdrawal seizures before reporting the rash.
4. Wait until the next routine visit unless the rash becomes itchy.

**Correct answer: 2**

## Explanation

A new rash with fever and mucosal involvement can represent a life-threatening lamotrigine reaction, with additional risk from valproate coadministration.

## In-depth explanation

Quick answer
Treat rash plus systemic findings as a serious lamotrigine emergency.

Why this is correct
The boxed warning directs discontinuation at the first sign of rash unless clearly unrelated because benign and life-threatening rashes cannot be predicted reliably.

Easy analogy or mental picture
Treat medication safety like airway triage: identify the threat, interrupt exposure, support physiology, and verify a durable response.

Memory hook
Cue, risk, action, response, recurrence check.

NCLEX decision rule
Choose the action that prevents the most immediate medication-related harm while preserving reassessment and escalation.

Why the other choices are wrong
Options that normalize deterioration, add interacting medication, or delay rescue leave the safety loop open.References
1DailyMed: LAMICTAL (lamotrigine)Boxed warning for serious skin rash, risk with valproate and rapid escalation, and immediate discontinuation unless clearly unrelated

## Clinical scenario

Medication safety review
Verify the indication, current assessment, respiratory and neurologic status, interactions, authorized rescue action, and measurable follow-up.

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