Update to poison/potion crafting today. Now “Empty Vials” (found just to the left of the alchemy station) are required to create either one. Poison has been changed to work on hit rather than on touch, and healing potions spawn next to the crafting station rather then at the ingredient.
Poison works a bit buggy with the bat summon, I’m still trying to figure that out.
Give it a try and tell me what you think!