Timing of blood draw for a serum lamotrigine level

Question from a Member: The article on the Simple and Practical website about “when to order” (timing of blood draw) identifies timing for lithium, divalproex, and carbamazepine but I didn’t see lamotrigine there. I assume that it is a 12-hour trough level. My patient normally takes the lamotrigine in the morning. In another article on this…