Tongjing Wan
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Tongjing Wan (simplified Chinese: 痛经丸; traditional Chinese: 痛經丸) is a brownish-black pill used in Traditional Chinese medicine to "promote blood flow, 'dispel cold', regulate menstruation and relieve pain".[1] It tastes slightly sweet and bitter. It is used where there is "abdominal pain during menstruation due to 'stagnation of blood by cold' ".[2] Tongjing Wan is to be taken before menstruation.