Laxative made of natural Senna leaves; contains 60 tablets Works in just 8 to 12 hours Each tablet contains 15 mg of sennosides B For quick and effective relief adults and children 15 years of age and over take 1 to 3 tablets before bedtime; follow with a glass of water or juice. It gently and effectively relieves constipation during the night. Prunelax don´t lead to dependence. In order to treat occasional constipation Prunelax can be used for up to 7 consecutive days. Sennosides B is a natural laxative of plant origin used to treat mild constipation caused by poor eating habits lack of exercise and inadequate consumption of natural fiber.