What is Elavil?

No, Elavil (amitryptiline) isn't a benzodiazepin. It is a tricyclic antidepressant

Yes it can be an addictive narcotic

Elavil is a mood-elevating drug. If it is taken for prolonged periods and then discontinued, there will usually be a backlash effect that causes depression for a period of time. Abrupt cessation can...

ive been taking the elavils to sleep for the last week along with my methadone, so take em and sleep :)

Yes. It is most often prescribed by neurologists as a migraine preventive (or for migraine prophylaxis, as it is termed, medically).