Twice now, Liril has been awarded this substance called indulcet as a reward for completing a quest. The first time, she accidentally ate it while trying to click on it for info, and got the "you feel badly" message a few times before it stopped, and then suddenly she had a severe case of Witch's Pox even though she has immunity to disease.

Now she is carrying around another indulcet (and being very careful not to eat it), but no stores seem to want to buy it for any price. Checked pawn, general, and alchemy shops in particular. Should she just "donate" it (i.e. drop on ground) at the Temple, or could there be some other use for it that I'm not remembering?