Nashville-based Cumberland Pharmaceuticals has entered a co-promotion agreement for Kristalose® within the United States with Poly Pharmaceuticals Inc., a privately held U.S. specialty pharmaceutical company. Poly's sales force will more than double the number of nationwide physicians called upon in support of the product.

Kristalose is a dry powder, crystalline formulation of lactulose that is designed to enhance patient compliance during treatment of acute and chronic constipation. It is the only prescription laxative available in pre-measured powder packets, making it convenient and easily portable.