How is she doing them? IV'ing, or snorting? If she is snorting, there is more of a chance of respiratory complications. Sounds like ("coldshakes them") that she IV's them.
The only way to know what's going on is for her to be seen by her doctor, which is what I wouold recommend at this point.
If she has particles from snorting, unfortunately, there is no way to "get them out"...she would end up with an infection, and likely a resulting pneumonia, which would need to be treated with antibiotics....probably IV.
Suggest to her that she be seen by her doc...sooner rather than later...especially with the shortness of breath, she doesn't want to mess around with that!!!