Smoked Plum Classic Formulas … Natural Herb Library

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Astringes the Lung and stops chronic cough, especially when prolonged leakage and irritation need containment rather than stronger dispersing herbs.
Astringes the intestines and relieves chronic diarrhea or dysenteric disorders marked by persistent loss.
Generates fluids and alleviates thirst when dryness, chronic illness, or summer heat has injured body fluids.
Calms roundworms and relieves parasite-related abdominal pain in the classic `Wu Mei Wan` treatment logic.

Wu Mei Wan ... the defining classical formula for roundworm disorder and mixed cold-heat intestinal presentations.
Sour plum drink and fluid-generating traditions ... the familiar thirst-relieving lane of the herb.
Astringent chronic-cough or chronic-diarrhea pairings with other leakage-stopping herbs ... the usual containment strategy.

Traditional herbology describes Wu Mei as sour, astringent, and neutral, entering the Liver, Spleen, Lung, and Large Intestine.
Its four classical hallmark actions are stopping cough, stopping diarrhea, generating fluids, and calming roundworms.
Because it is strongly restraining, older texts caution against using it too early in external or excess conditions.