title: Benzalkonium chloride and bronchoconstriction.
mesh_terms: D001548:Benzalkonium Compounds / Q000008:administration & dosage / Q000009:adverse effects*; D001986:Bronchial Spasm / Q000139:chemically induced*; D006801:Humans; D009330:Nebulizers and Vaporizers
chemical_list: D001548:Benzalkonium Compounds