Mistakenly inhaled fire extinguisher dry powder is generally relatively non-toxic, but excessive inhalation can easily cause aspiration pneumonia, respiratory distress, etc., at this time you can consult a doctor in a timely manner, through continuous oxygen inhalation, mechanical ventilation and other ways to alleviate the symptoms. 1. In order to avoid coughing and coughing up sputum after inhaling fire extinguisher powder, you can give acetylcysteine and other expectorant drugs to relieve coughing and coughing up sputum and other symptoms. 2. You can also use drugs such as Keskin to avoid worsening of the situation, resulting in infection and pneumonia. If the infection has been caused by Staphylococcus aureus or respiratory syncytial virus, it can be treated with amoxicillin or ribavirin. If there is already an emergency situation such as difficulty in breathing or causing pneumonia, you should seek medical attention in a timely manner and under the professional guidance of a doctor.