Pericarpium aurantii belongs to the Rutaceae family (rue plants).

It is a regulator of qi, and is particularly effective in the stomach, spleen and lung feedback circuits. It is used to treat relevant stagnations affecting the phases of change in the middle, such as meteorism, distention, nausea, eructation, vomiting and feelings of fullness or tension, as well as disorders that are accompanied by coughing and large quantities of clear mucus.
It is contained in many remedies, including the Six-Gentlemen Formula (Liu Jun Zi Tang).