Pulmonary Chemical-Warfare Agents By James M Madsen, MD, MPH, U S.Army Medical Research Institute of Chemical Defense (USAMRICD) Reviewed / Revised Jan 2023 View Patient Education Pathophysiology Symptoms and Signs Diagnosis Treatment Topic Resources Representative Type 1, Type... Pulmonary agents include traditional chemical-warfare "choking" agents such as chlorine, phosgene, diphosgene, and chloropicrin and some vesicants such as sulfur mustard, Lewisite, and phosgene oxime (which also affect the skin) as well as military smokes, products of combustion, and many toxic industrial chemicals.