Capsaicin has side effects. Keflex is a stimulant laxative, and short-term, small amounts have insignificant side effects. Long-term use in large quantities has more side effects. Young children and pregnant women must be used under the guidance of a doctor. Side effects are mainly manifested as follows: 1, drug dependence, long-term use of Keselu patients once stopped using Keselu, it is difficult to discharge stools. 2, the formation of drug resistance, reduced efficacy, even if the increase in the amount of medication, but also will not produce a therapeutic effect. 3, the repeated use of Keselu, the intestinal stimulation of the sensitivity of the reduced, even if there is fecal matter, but also difficult to produce a sense of constipation. 4, habitual constipation. The main ingredient of Kesemol is glycerin, which can absorb the water of the intestinal wall, and can cause the intestinal wall to be dry and form habitual constipation.