This document details a lawsuit filed against several pharmaceutical manufacturers (Defendants) alleging they engaged in illegal kickback schemes with Omnicare, the largest pharmacy provider to nursing homes. Specifically, the Defendants are accused of paying kickbacks to Omnicare in exchange for switching patients from their prescribed medications to the Defendant's preferred, more expensive drugs. This large-scale switching of medications without proper oversight allegedly put patients' health at risk and led to false claims being submitted to government health programs for reimbursement. The document provides extensive details of the alleged schemes between each Defendant and Omnicare involving specific drugs over many years, in violation of federal and state false claims acts and anti-kickback statutes.