A client on stable maintenance lamotrigine 200 mg/day for 1 … | MyMerci
Medical EmergenciesPA
Question
A client on stable maintenance lamotrigine 200 mg/day for 1 year reports missing all doses during a 7-day camping trip. She has no new symptoms today. Which is the nurse's best instruction?
1Resume the 200 mg maintenance dose tonight
2Take the missed doses all at once today
3Double the next dose to catch up
4Restart with a slow titration schedule under provider guidance — missing >5 days requires re-titration to avoid SJS✓ Correct answer
Explanation
Correct (2): If lamotrigine is missed for more than 5 days (some references >2 weeks), the slow titration schedule must be restarted; sudden resumption of maintenance dose carries the same SJS risk as initial rapid titration. (1) Direct resumption risks rash. (3) Double-dosing increases toxicity. (4) Catch-up dosing is unsafe.
In-depth explanation
Memory Tip Lamotrigine "5-day rule" — miss >5 days → restart titration. Patient Teaching Travel/vacation: never run out; carry extra supply.
Clinical scenario
Scenario 30-year-old female on lamotrigine 200 mg/day × 1 year for partial seizures. Missed 7 consecutive days on a camping trip; asymptomatic today.
Key concepts
Missed dose protocol — Lamotrigine-specific rule that missing >5 days requires re-titration to avoid SJS.
Maintenance dose — Stable target dose continued after titration; lamotrigine 100-400 mg/day depending on indication and co-meds.
Adherence counseling — Patient education emphasizing that lamotrigine cannot be safely restarted at full dose after long lapse.