And here is the log, for some reason the knock-out poison remains even after the slept affect of blacjack wears off.

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized

Autosaving.
You are hungry.
You come to with a pounding headache.
You slowly float to the ground.

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized wake
g flying girdle
e
quaff flying
whe
You can't wake up!
Drugadath tells the group 'bah'

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized In your dreams, or what?

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized In your dreams, or what?

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized In your dreams, or what?

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized In your dreams, or what?

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized aff
You are affected by:
Skill: 'detect hidden' for 14 hours.
Skill: 'heightened awareness' for 14 hours.
Skill: 'mind control poison' for 11 hours.
Skill: 'endure' modifies armor class by -38 for 5 hours.
Skill: 'endure' modifies save vs spell by -19 for 5 hours.
Skill: 'knock-out poison' for 4 hours.
Skill: 'blackjack' for 1 hours.

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized gt wake me
You tell your group 'wake me'

<566/566hp 594/594m 511mv 9159tnl> 10 PM civilized gt I am knocked out
You tell your group 'I am knocked out'


Anyways, I don't believe it should be stackable, for obvious balance reasons.