The drug Senokot contains natural purified senna as the active ingredient, according to Purdue Pharma. Senokot is a nonprescription drug that is used to treat constipation. Its generic name is sennosides.
Senokot is a laxative that works by irritating bowel tissues, which stimulates bowel movements. The senna is derived from the senna plants Cassia acutifolia and Cassia angustifolia. These plants have been used to treat constipation. The drug Senokot also contains the ingredient docusate sodium. This acts as a stool softener when hard, dry stools are present in the bowel.
Patients who use Senokot should expect a bowel movement within 6-12 hours of taking the drug, as stated by the Physician's Desk Reference. Side effects may include nausea, cramping, diarrhea and abdominal discomfort, according to WebMD.