Im playing the game second time on HoF.. Im in second level of dragons eye and I made the wyvern poisons from the wyvern stingers... now i know that it has to be used on the water sinks but in its description i now noticed it says that the poison can also be used on a sword or a dagger or to make an antidote or delay posion potion... Any idea how to make those?

I think you need a lab.maybe the one in Underdark, where you killed the Viscisamera? Dunno. Been pondering the same thing, never bothered to check.

You cant go back to the underdark lab from dragons eye