Read more: An Urgent Call to Revive the U.S. Pharmaceuticals Supply Chain "McKesson's gambit — threatening to immediately stop the supply of hundreds of thousands of prescriptions per day if Rite Aid will not accede to McKesson's demands — is opportunism and corporate greed in its basest form," Rite Aid said in its lawsuit. "And it is plainly illegal." Rite Aid said in court papers that it buys all of its branded pharmaceuticals and most of its generic drugs from McKesson. The case is Rite Aid Corp., 23-18993, U.S. Bankruptcy Court for the District of New Jersey.