LAS VEGAS--(BUSINESS WIRE)--Sagebrush Health Services, a nonprofit organization serving over 10,000 Nevada patients, has filed a lawsuit against Amgen Inc. (NASDAQ: AMGN), alleging that Amgen acted unlawfully by unilaterally terminating the sale of discounted drugs to Sagebrush's clinics and improperly retracting millions of dollars in past discounts. These actions, Sagebrush maintains, temporarily prevented it from supplying its clinics with necessary medications from Amgen and other manufacturers. Guru Ch ...