Amitriptyline...as migraine treatment?

Has anyone ever used this med to treat their migraines? My Dr. just prescribed it to me (along with Zomig), but I am leery of med.s, especially when they are anti-depressants. Any advice? I'm scared that the Amitriptyline will make me all loony acting and if thats the case, I'd much rather just deal with my migraines...
Thoughts?