Cascara Sagrada bark and rhubarb are laxatives that contain
anthroquinones. Humaworm also has anthroquinone herbs though. Many feel it is not a good idea to use anthroquinone containing herbs. Some believe that the laxatives will help with a parasite cleanse, and especialy help get larger parasites out.

That formula might work well, although I prefer to avoid the laxative herbs though. The black walnut and wormwood are themselves also mild laxatives.