LEXINGTON, Mass.--(BUSINESS WIRE)--Critical Therapeutics, Inc. (Nasdaq: CRTX) announced today that Dey, L.P. (DEY), an affiliate of Merck KGaA in Germany, began promoting ZYFLO® (zileuton tablets), Critical Therapeutics’ asthma drug, in the U.S. on April 30, 2007. The addition of the DEY sales force brings the total number of sales representatives promoting ZYFLO to approximately 220. The combined sales force is focusing primarily on respiratory specialists, such as allergists and pulmonologists, as well as certain targeted primary care physicians.