Castor Oil is an ingredient used in potion-making.
"Castor Oil can be used as an ingredient in some potions."
Castor Oil is used to brew the following potions:
- Apothecary: 14 bottles for 4 Galleons
- Can be found in Book 2, Chapter 16, Moment 1 in the cabinet in the back of the Hospital Wing.
- Open the door, second zoom on the shelf, Book 4, Chapter 36, Moment 1.