Systemic steroids for COPD are voodoo. Standard use to be 8 weeks of treatment with them, then that was shortened to 2 weeks, then they showed recently 5 days was equivalent to 2 weeks:
http://jamanetwork.com/journals/jama/article-abstract/1688035
No difference in mortality, no difference in lung function, no difference in need for mechanical ventilation, but it shortened hosp LOC by 1 day.
This study showed no difference on intubated pts with COPD exacerbations (steroid vs placebo):
https://www.ncbi.nlm.nih.gov/pubmed/23794465
My personal belief? COPD, like sepsis, has multiple phenotypes that are expressed. There is probably a subset of patients who benefit from steroids but probably a large amount that don't. We don't have a great way of identifying them. I wouldn't withhold systemic steroids from my COPD exacerbations at this time, but I'm a lot less gung-ho about the mega doses we throw at them "ZOMG 125MG SOLUMEDROL Q1H STAT" and don't believe in anything longer than 5 day courses for outpatient treatment.
As an aside I had a patient come to the ED last night for her COPD who was pissed off because the ED doctor she saw three days prior gave her the wrong steroids. Apparently he wrote her for 5 days of once-per-day prednisone, but the only thing that works for her are the packs which have 5 pills, then 4, then 3 etc...
Everyone knows medrol dose packs are way more expensive than daily prednisone right? (4$ generic list for prednisone)