What steroid durations do you use for the treatment of acute, chronic, and drug-induced eosinophilic pneumonia?

For acute eosinophilic pneumonia, these are often high doses of IV methyl prednisone in the hospital, and assuming that the exposure or risk is mitigated, I would taper these down over a short period of time after discharge. Chronic eosinophilic pneumonia, I treat briefly with steroids but quickly transition over to a steroid-sparing agent, as these patients often need 6 to 12 months or longer of treatment. And in my experience, even after stopping medication in chronic eosinophilic pneumonia, they often have a recurrence of the disease. Drug-induced just requires stopping the drug and a few weeks of a tapering dose of prednisone.