Senokot® Natural Vegetable Laxative Ingredient Tablets Regular Strength. Gentle, dependable overnight relief. Standardized senna concentrate. Purified comfort promise senna. 20 tablets. The Senokot® laxative comfort Promise®. For your comfort, the active ingredient in Senokot laxatives is always purified senna, manufactured to high quality standards. Uses: Relieves occasional constipation (irregularity). Generally produces a bowel movement in 6-12 hours. If you have comments or questions about Senokot® tablets, please call toll-free 1-888-726-7535 (8am-5pm EST, Mon.-Fri.). Visit our website: www.senokot.com. ©2016, Purdue Products L.P.