I've used the tea (and not the SWF) and have had no problem with cleaning out the ol' system. You can get it at just about any health food store or on the web.

--------------------

Smooth MoveTea is formulated to act as a stimulant laxative based on the traditional use of senna leaf for relief of occasional constipation. Senna leaf, as a laxative herbal tea ingredient has at least a one thousand year history of human use in traditional Arabian, Asian and European herbal medicines. Today senna leaf preparations are approved for use as laxatives in the national pharmacopoeias and formularies of China, France, Germany, Great Britain, India, Japan, Switzerland and the United States. Senna’s laxative action is largely attributed to its anthranoid content. Anthranoids are compounds naturally occurring in many plant laxatives including aloe, buckthorn, cascara sagrada, rhubarb and senna.


Ingredients
Active Ingredient: 20mg. Sennosides A & B per cup from senna leaf. Other herbal ingredients: Licorice root, fennel seed, orange peel, cinnamon bark, coriander seed, ginger rhizome, natural orange flavor.