A nurse is caring for a client prescribed Warfarin. Which nursing action is most appropriate regarding monitoring INR levels and maintaining consistent dietary vitamin K intake?
1Instruct her to STOP lamotrigine immediately and go to the ED — any rash on lamotrigine requires urgent evaluation for Stevens-Johnson syndrome
2Advise her to apply hydrocortisone cream to the rash and continue the medication — topical steroids are effective for mild cutaneous reactions✓ Correct answer
3Reassure her that mild rash is common with lamotrigine and advise her to keep taking the medication — most rashes are benign and resolve spontaneously
4Instruct her to take diphenhydramine and monitor the rash for 48 hours — mild rashes are common in early treatment and often self-resolve
Explanation
When administering Warfarin, key nursing considerations include monitoring patient status, checking critical laboratory values, and providing appropriate safety education. Unsafe practices such as stopping medications abruptly or doubling missed doses are incorrect.
Memory Tip Lamotrigine = "Lamo-Slow" titration mandatory. Rash + Lamotrigine = STOP + ED. CPG Slow titration (25 mg → 25 mg → 50 mg over weeks) reduces but does NOT eliminate SJS risk.
Scenario 35-year-old female on lamotrigine per standard slow-titration schedule × 18 days for bipolar I disorder. Now reports new diffuse rash on chest/arms with mouth soreness.
Lamotrigine titration — Mandatory slow dose escalation schedule (weeks) to reduce SJS risk; rapid titration is contraindicated.
Stevens-Johnson syndrome — Severe mucocutaneous reaction with epidermal detachment; can progress to TEN with high mortality.
Drug-induced rash — Any rash on lamotrigine warrants immediate discontinuation and emergency evaluation.