Difficulty in breathing after inhalation of chlorine-containing agents needs to be removed from the scene and treated with bronchodilators, glucocorticosteroids, antibiotics and other medications. 1. Disengage from the scene: After inhaling chlorine-containing agents, one should immediately move away from the scene to avoid further inhalation and go to a place with good air circulation. 2. Bronchodilators: Inhalation of salbutamol, ipratropium bromide, terbutaline and other drugs, or intravenous use of aminophylline, doxophylline, can reduce airway spasms, alleviate the symptoms of dyspnea. 3. Glucocorticoid drugs: for example, beclomethasone dipropionate, fluticasone propionate, etc., which can help to reduce the inflammatory response of the airway. 4. Antibiotic drugs: if the combination of bacterial infection, resulting in bronchial edema, can use cefuroxime, cefixime, etc. for intravenous infusion treatment. 5. Others: such as hyperbaric oxygen therapy, clearing respiratory secretions, tracheal intubation, mechanical ventilation and so on. Difficulty in breathing after inhaling chlorine-containing preparations should go to the hospital in time, cooperate with the doctor’s treatment, and do not use the medication on your own, so as to avoid delaying the treatment. The above drugs should be used under the guidance of a physician.