The U.S. Food and Drug Administration on Thursday approved Merrimack Pharmaceutical Inc’s pancreatic cancer drug, Onivyde, with a severe safety warning. The company’s shares fell as much as 28 percent to a 13-month low of $7.27 in afternoon trade before halving the losses. Onivyde, in combination with chemotherapy treatments 5-fluorouracil and leucovorin, aims to treat […]