Clinically proven, Senokot Extra Strength tablets have double the strength of our regular tablets but are just as gentle. Senokot Extra Strength uses a natural vegetable laxative ingredient to provide dependable, overnight relief from occasional constipation when taken at bedtime. Senokot Extra Strength tablets generally produce a bowel movement in 6-12 hours and can be used in children ages 6+. For your comfort, the active ingredient in Senokot Extra Strength laxative tablets is purified senna, manufactured to high quality standards. Constipation can certainly interfere with your day and may be caused by travel, stress, dietary changes, or aging. Senokot brings nature and science together to give you five formulations that meet your specific needs. Satisfaction guaranteed. For over 65 years, physicians and pharmacists have trusted – and consumers have relied on – the Senokot brand to provide gentle, effective overnight relief of occasional constipation. Senokot Extra Strength is FSA or HSA eligible. Use as directed.