People with depression often cycle through several drugs before they find one that helps. Now, at least three companies say they can improve the odds that patients get the right therapy quickly. CNS Response Inc. (CNSO), AssureRx Health Inc. and Brain Resource Ltd. (BRRZY) are offering new tests designed to find physical and mental patterns that will predict the best treatment for individual patients. In doing so, they are also creating a new testing market that CNS Chief Executive Officer George Carpenter said may reach $2.7 billion a year in the U.S.
