Tranquilized (7)
I believe the answer is:
sedated
'tranquilized' is the definition.
('sedate' can be a synonym of 'tranquilize')
This is the entire clue.
(Other definitions for sedated that I've seen before include "out for the count!" , "Under the influence of drugs" , "Tranquillized" , "Calmed with drugs" , "Drugged" .)