Are Black Shun Pian and Gan Cao incompatible?
Heishunpian (Black Prepared Sichuan Pepper) and licorice are usually considered to be contraindicated in traditional Chinese medicine combinations. It is recommended to use these two herbs under the guidance of a qualified TCM practitioner. Detailed analysis is as follows:

Heishunpian has multiple functions including enhancing fire to assist yang, dispersing cold to relieve pain, and promoting circulation to remove obstruction in the meridians. It is used for treating symptoms such as kidney-yang deficiency (kidney-yang deficiency), abdominal pain, and rheumatic joint pain. Licorice, on the other hand, is a neutral herb with a sweet taste, offering various benefits such as strengthening the spleen and replenishing qi, moistening the lungs to relieve cough, and alleviating urgent pain. These two herbs may have conflicting properties, and their combined use might affect efficacy or increase the risk of adverse effects. Therefore, Heishunpian and licorice are considered incompatible.
It is recommended that when using TCM herbs, individuals should do so under the guidance of a qualified TCM practitioner, making comprehensive judgments based on individual constitution and specific medical conditions. Never arbitrarily combine herbs on your own to ensure safety and effectiveness. During the use of TCM herbs, pay attention to bodily reactions, and if any discomfort occurs, seek timely medical advice to adjust the treatment plan accordingly.
While taking TCM herbs, avoid consuming raw, cold, greasy, or spicy foods, such as sushi, fried foods, chili peppers, etc., to prevent interference with the herb's effectiveness.