I have yet to feel any benefit from lamictal, though it works great for others. I started at 25 then up to 50 a week later. I think a month or two later I went up to 100mgs. I just upped the dosage up to 150 on Friday after about three to four weeks.
I had started off taking it at night, but once I went up to 100mgs I started taking it in the morning because I couldn't sleep at night, so I would say it's activating.