Some text from Minecraft Wiki used under Creative Commons Attribution-Share Alike License 3.0
|Type of Block||Solid block;Interactive|
|Data Values||Hex: 75 Dec: 117|
When right-clicked, the brewing stand interface displays. The Brewing Stand interface has 4 slots. The bottom 3 slots are for glass bottles. These bottles must be filled with Water or a potion. The upper slot is used to add an ingredient into the potions below. Brewing Stands will only yield itself if destroyed with a pickaxe . Brewing Stands also have a light level of 1. While distilling a reagent into the glass bottles filled with water or potion, one ingredient will distill into all three slots - e.g. one Nether Wart will create three Awkward Potions. Many items can be used in the brewing process, and they are usually spit into two categories: bases and secondary ingredients.
Secondary ingredients are the ingredients that determine the type of potion (in other words, the effect).
A detailed list of all brew-able potions and their recipes can be found here .