nar·co·sis 
(när-kōsĭs)
(när-kōsĭs)n. pl. nar·co·ses (-sēz)
A condition of deep stupor or unconsciousness produced by a drug or other chemical substance.
[New Latin narcōsis, from Greek narkōsis, a numbing, from narkoun, to benumb, from narkē, numbness.]