How do Senna Tablets work? Senna Tablets, a treatment for constipation, offer much-needed comfort by utilising natural herbal ingredients. Ideal for people who would want to employ a herbal cure and are experiencing constipation. There are 60 x 7.5mg Senna Tablets in this product. How is constipation treated with senna tablets? Senna pods, the active component in Senna Tablets, are a herbal treatment for constipation. Senna pods operate by causing your bowel muscles to work more frequently and forcefully, which helps in moving bowel