Imprimis Challenges Mallinckrodt's Acthar By: Benzinga via Benzinga March 21, 2017 at 16:33 PM EDT Imprimis Pharmaceuticals Inc (NASDAQ: IMMY) wants to stop egregious drug pricing issues, and Mallinckrodt PLC (NYSE: MNK) is its next ... Read More >> Related Stocks: Imprimis Phar Mallinckrodt plc Mylan Nasdaq Biotechnology Ishares ETF