Management of Lamotrigine-Associated Rash
Assessment and Immediate Management
- The National Comprehensive Cancer Network recommends assessing for signs of serious cutaneous reactions, including mucosal involvement, facial swelling, fever, or systemic symptoms that would indicate Stevens-Johnson syndrome or DRESS syndrome 1
- The presence of systemic symptoms, such as fever or lymphadenopathy, is a critical factor in determining the severity of the rash 1
Alternative Treatment Options
- The American College of Physicians suggests considering evidence-based anxiety treatments, such as SSRIs, SNRIs, or buspirone, as pharmacologic options for patients with a history of lamotrigine-associated rash 2
- Gabapentin may be considered as an alternative treatment option if a neuropathic pain component exists 2
Rechallenge Considerations
- The National Comprehensive Cancer Network recommends that rechallenge should only be attempted if the rash was definitively mild, non-serious, and lamotrigine was uniquely effective for a severe psychiatric condition with no alternatives, and notes that any mucosal involvement is an absolute contraindication to rechallenge 3
- The guideline society suggests that patient must have been on lamotrigine >6 months previously for any rapid reinitiation consideration, and that a history of previous rash is an absolute contraindication to rapid loading protocols 3
- The guideline recommends never restarting at previous therapeutic dose, and that the patient must re-titrate from the beginning 4