My Husband Is Having Double Vision He Recently Had Two

my husband is having double vision he recently had two stents put in his heart and given medication but I am concerned his medicine is too strong for an 84 year old male for instance he is currently taking two blood thinrs and meto prolol tartrate 25 mil and isosorbide monon itrate 30 mil daily should he cut down on any medication because he is seeing double vision keep calling the doctor but no answer ???? dan YYYY@YYYY again YYYY@YYYY thank you