Fuzi Lizhong Wan (Chinese: 附子理中丸) is a brownish-black pill used in Traditional Chinese medicine to "warm and reinforce the spleen and the stomach". It is slightly aromatic, and it tastes pungent and slightly sweet. It is used where there is "deficiency-cold syndrome of the spleen and stomach marked by cold sensation and pain in the epigastrium, vomiting, diarrhea and cold extremities".
References
Fuzi Lizhong Wan Wikipedia(Text) CC BY-SA