Generally, the correct use of Hou Pu does not cause loose stools (thin, unformed feces). The main effects of Hau Pu are to lower qi and remove fullness (allowing qi to move downward to alleviate the discomfort of flatulence), and to dry dampness and eliminate phlegm. Combined with Atractylodes macrocephala and Pericarpium Citri Reticulatae, Huperzia can treat dampness obstructing the middle Jiao (dampness impeding the functioning of the spleen and stomach), as well as distension and fullness in the epigastrium (abdomen). Its combination with rhubarb, Citrus aurantium, and mangosteen is effective in treating constipation due to hot constipation. Since there is no authoritative data confirming that it causes loose stools, it can usually be assumed that it does not cause this symptom when used correctly. In clinical practice, Houpu can be combined with a number of herbs, such as ephedra to treat coughing due to phlegm (a pathological product of impaired water metabolism), and hemixia to treat prunus qi (plum nucleus qi). This drug is pungent and warm, and its long-term use in large quantities may deplete qi and injure the body fluid, so pregnant women and those with qi deficiency and fluid deficiency should be cautious in its use. The drug should be taken under the guidance of a doctor, not self-medication.