Doxepin
"Doxepin was prescribed to me by my neurologist as an adjunct therapy with Topamax for migraine prevention.  I have only been on this for four months; two severe migraines! One trigger is lack of sleep. I have terrible insomnia. And if I do sleep, I sleep walk. Doxepin keeps me calm, migraine free, asleep and most of all I could have done with the weight gain."