What’s the fastest-acting medicine for coughs?

There is no fastest way to cure cough, you need to choose the right medicine according to the cause of the disease, cough can be seen in the upper respiratory tract infection, pneumonia, cough variant asthma, gastroesophageal reflux and other diseases.
If it is caused by upper respiratory tract infections, cough can be applied to severe cough suppressants, such as Folcodine.
Cough caused by pneumonia requires anti-infective treatment in addition to symptomatic cough suppressant treatment, and appropriate antibiotics such as cefmetazole, azithromycin, moxifloxacin, etc. can be selected according to experience or drug sensitivity test.
For asthma-induced cough, commonly used drugs include glucocorticosteroids (e.g. budesonide), β2 agonists (e.g. salmeterol), and inhaled anticholinergics (e.g. ipratropium bromide).
For cough caused by gastroesophageal reflux, commonly used medications include acid-suppressing drugs such as omeprazole and ranitidine.
There are many causes of cough, including respiratory diseases, pleural diseases, cardiovascular system diseases, etc. Cough symptoms should go to the hospital in a timely manner, to clarify the cause of the disease and then actively treat it.
However, it should be noted that the medication must be used under the guidance of a doctor, do not blindly use the medication on your own.