You've always taken the entire amount in the a.m.? I think the starter pack I received when I first started Lamictal had you start with one tablet (25 mg?)in the a.m., then one tablet a.m. and one p.m., then two in a.m. and one in p.m., etc. So at this point, I take 75 mg in a.m. and 75 mg in p.m. for a total of 150 mg. I don't know that I've ever experienced sleep problems due to Lamictal. Not to say I don't have sleep problems, though. But I've had those my whole life, and another med I take also interferes with sleep. I didn't notice any change with Lamictal. Ten mg ambien usually takes care of any sleep initiation problems for me.

I think I'd try splitting your dose if you can. I don't know what to say about the old ambien, sorry. When is your pdoc bacK?

Good luck,

gg