Potionology

Craftables

 * Note 1: Venom and Medicine refer to Briefcase full of snakes and the quantity it lists. While things like venom gland are an item.
 * Note 2: Potionology is a 2 step process. First you craft your basic level 1 potion. Then you are given a one time option to upgrade it with an extra dose of either medicine or venom. If you don't have enough in your briefcase full of snakes when you initially crafted the basic potion, then you will not get a second chance to upgrade it and must instead restart the brewing process from scratch with a fresh batch of ingredients.
 * Note 3: When crafting the basic potion, the game uses the shorthand "a liver" or "a spleen" or "a venom gland". Those actually refer to snake liver, snake spleen, and snake venom bladder. So make sure you have enough in stock.