Should One Continue Taking Pradaxa And Nebivolol Despite It Leading To Blood Clots After Discontinuing Ecosprin AV?

Hi, my father is 81 years and used to take Ecosprin Av75 after. New Doctor changed his medicineand stopped Ecosprin and he is having blood cloths with these new medicine. His new medicine are Pradaxa 110mg Twice a day and nebivolol 2.5 mg twice a day.