oh another possibility:
"his vital signs are stable"
"i see..."
"he is beginning to wake up!"
"is that supposed to happen"
"good lord no!"
"the extra adrenaline is interfering with the drugs to keep him asleep!"
"oh my god...."
*4 simultaneous snapping noises*
"he has broken free!"
*crack! rip! gash! stab!*
but yeah...the extra adrenaline would probably make test subjects hypo-violent