Final thoughts on using Mg for AECOPD
All that being said, is it reasonable to use Mg for AECOPD? I think so. I’d stick to using it for severe cases where conventional treatments have failed, just like the NHLBI and GINA advise for asthma. I’d also limit it to 2-3 g, which is the dosing range employed by several of the existing AECOPD RCTs. The assertion that Mg may be harmful in AECOPD because COPD affects the small airways, and asthma does not, is misguided. Both affect the small airways. Furthermore, none of our inhaled therapies reach the small airways, so one can’t argue against using Mg because it only targets larger airways without abandoning albuterol and ipratropium as well. I don’t think anyone would advise that. Given what we now know about asthma and COPD phenotypes and asthma-COPD overlap, I’d caution against pedantic theories about response to therapies.
Aaron B. Holley, MD, is an associate professor of medicine at Uniformed Services University and program director of pulmonary and critical care medicine at Walter Reed National Military Medical Center. He has received research grants from Fisher-Paykel and has received payments from the American College of Chest Physicians.
A version of this article first appeared on Medscape.com.