my stepdad has copd recently got an unknown infection and his hand got swollen very badly, they put him on cefdinir and today he has felt fine but he just started coughing up blood, he says he feels no other odd effects, he takes a blood thinner(warfarin),amiodarone(may misspelled), and lisinopril, I don t know if one of those is Lasix but he takes that, and heart medication.