Asthma is a common disease in life. Emergency measures should be taken when  an asthma occurs. The most commonly used medicine is aerosol. Here are some  basic aerosols for asthma. 1. Symptomatic antiasthmatic drugs. Antiasthmatic  spray can relieve the spasm of bronchial smooth muscles. It has rapid effects  and small side effects. This kind of medicine is mainly used to relieve wheezing  symptoms at the time of onset, and should be stopped when the condition is  stable. Such as salbutamol aerosols Salbutamol and Ventolin, as well as  boriconene aerosol Bricasol. 2. Preventive drugs. These drugs are divided into  two types. One is inhaled corticosteroids, which can eliminate non-specific  inflammation of the airways, reduce airway hyperresponsiveness, and prevent  asthma attacks. It should be applied for a long period of time to significantly  reduce or stop asthma. The other type is inhaled sodium cromoglycate, which can  prevent wheezing caused by allergic reactions. It should also be applied for a  long period of time, preferably before the allergy season. 3. Aerosols with  antiasthmatic and preventive effects. This type of medicine is a mixture of the  above two drugs in a certain ratio, which is mostly used for heavier patients  and needs to be used in accordance with the doctor's order. The nature of asthma  is a chronic inflammation of the airways, which is closely related to exposure  to dust mites, pollen, animal skins, inhalation of some irritating gases,  intense exercise, intense emotions such as tension and excitement, drugs and  colds and other factors. People with a history of asthma should try to avoid  contact with allergens.