There’s a druid spell that cures the “ill” condition. I think fleeing stops the fight so you don’t get anything, but I’ve never used it myself. I had not included the spell levels in the cheat sheet for lack of space. I probably should, but note that in-game when you want to choose a spell to cast you can type “?” And it will let you select a spell from the ones you are capable of casting given you level and power points.