I had my Aortic Valve replace with a bovine valve on Jan 12th. I have been on Xaltra to thinks out my blood so I could have a treatment to fix arrhythmia. On Friday the Nurse Practitioner Seemed to be overwhelmed with some questions I had as to medication. Her reply was It s medicine . We that is not the answer I wanted. She made me upset and accused me of being angry. I said I am not angry, I am asking a question. She left the exam room to get the doctor. This upset me very much. I did not sleep on Friday or Sat. nights. I then developed asthma. Is there a connection between Xaltra and asthma?