Hi there, I am also out of breath and on Velcade / dexy. I have to say breathlessness started after diagnosis because I was originally admitted to Hospital with Pneumonia, that was in February. But even now, 5 months on and the Pneumonia cured, I still get out of breath going up a flight of stairs. The silly thing is I can ride my cycle at a steady pace and not get breathless.
Did you have any other illnesses such as Pneumonia, Bronchitis, Aneamia?