How long does it take to neutralize on Lamictal. I am currently titrating up 50 to 100 mg every two weeks. The goal is to get me to 400mg/day and then slowly discontinue the Trileptal. I am currently at 150 mg/day Lamictal and 1950 mg/day of Trileptal. I feel like crap. Does it go away? I am worried that the lethargy, tiredness, mental slowness won't go away, which is why I am switching to Lamictal in the first place. Or will it stabilize once I am off the Trileptal. Help!!!