Senokot Natural Vegetable Laxative Ingredient Tablets, 100-count. Senokot Tablets provide gentle, overnight relief for occasional constipation. If you have occasional constipation, try regular strength Senokot for gentle, overnight relief. Produced from the natural vegetable laxative ingredient senna, Senokot Tablets can be taken at bedtime and generally causes a bowel movement in 6-12 hours. When you - or someone in your family - are troubled by occasional constipation, you want relief that's effective but gentle. For over 55 years, physicians and pharmacists have recommended - and customers have relied on - the Senokot Family of Laxatives to provide gentle, effective overnight relief of occasional constipation