Ok here's what I just learned. One study found that nandrolone (that's Deca) does negatively impact some immune system markers, but more pertinent to you is that it also causes an increase in some inflammatory cytokines. The latter is quite possibly what's causing your experience of shortness of breath due to inflammation in the lungs. The Deca is going to be working against the action of the corticosteroids the doc just gave you. I'd skip the next Deca injection for sure, Donna.