Stephan: One other useful treatment for constipation used by the GI doctors is the colon preparation "colyte". Take 8 ounces before retiring in the evening or less if it works for you. Colyte is a mixture of polyethylene glycol and sodium & potassium salts. I believe the PEG causes an increase in osmotic pressure & thus an increase in water content in the stool. The sodium & potassium chlorides, bicarbonates, & sulfate maintain the proper electrolyte equilibrium. Don Conley