lamotrigine rash
Potentially serious skin reaction associated with lamotrigine therapy that can progress to life-threatening conditions like Stevens-Johnson syndrome.
Full Definition
Lamotrigine rash refers to skin reactions that occur in approximately 10% of patients taking lamotrigine, ranging from mild, benign eruptions to potentially fatal severe cutaneous adverse reactions. The most concerning presentations include Stevens-Johnson syndrome and toxic epidermal necrolysis, which typically develop within the first 2-8 weeks of treatment. Risk factors include rapid dose titration, concomitant valproate therapy (which increases lamotrigine levels), younger age, and female gender. Early signs include fever, lymphadenopathy, and facial swelling accompanying the rash. The reaction is more common when lamotrigine is started at high doses or escalated too rapidly, emphasizing the importance of slow titration protocols. Any rash developing during lamotrigine therapy requires immediate evaluation and typically necessitates permanent discontinuation, as rechallenge carries high risk of recurrence with potentially greater severity.
Usage
Usage note: Always document timing, characteristics, and associated symptoms of any rash during lamotrigine therapy; use specific terminology rather than generic 'skin reaction.'
In Context
- "The psychiatrist immediately discontinued lamotrigine after the patient developed a suspicious rash on day 10 of treatment." — Safety incident report
- "Proper lamotrigine titration protocols significantly reduce the risk of serious rash development." — Prescribing guideline