https://pubmed.ncbi.nlm.nih.gov/28349590/
Benzalkonium Chloride: A Bronchoconstricting Preservative in Continuous Albuterol Nebulizer...
For convenience, many pediatric hospitals are preparing solutions for continuous nebulized albuterol using the 0.5% 20-ml multidose albuterol dropper bottle....
benzalkonium chloridepreservativecontinuousalbuterolnebulizer