Senna belongs to the laxative medicine, with diarrhea heat stagnation, laxative, diuretic and other effects, in general, 3 to 6 hours after taking senna can take effect, but the specific time varies from person to person. Senna is sweet, bitter, cold in nature, and belongs to the large intestine meridian. It is mainly used to treat dry stools caused by dryness and heat, abdominal fullness and distension, food accumulation in the stomach and indigestion. Senna leaves with Chen Pi, for dietary disorders, food stagnation; with Citrus aurantium, for constipation due to intestinal and gastrointestinal heat, abdominal distension; with Petunia seeds, abdominal skin, for edema and abdominal distension, dysuria (urinary incontinence). Please consult a medical practitioner for the relevant combinations. This drug is contraindicated in pregnant women, during menstruation, lactation and for those who are physically weak. If the dosage is too large, it may lead to abdominal pain, nausea, vomiting and other symptoms. Please consult a medical practitioner before use to prevent misuse.