Poison (item)

From NWNWiki

Various vials of poison were introduced in the Hordes of the Underdark expansion. Player characters may use these items on slashing or piercing weapons in an attempt to coat the weapon with the poison. This attempt requires a dexterity check to succeed:

10 + d10 + dexterity modifier  vs.  poison's apply DC

A failed roll is supposed to poison the applier, but this has not been implemented. (Probably a bug.) Assassins and blackguards are trained in the use of poison and may coat their weapons with poison without risk of poisoning themselves. (No die roll is necessary; the poison is automatically applied.) The default poisons will remain on the coated weapon for three rounds.