Pneumonia in adults does not necessarily require infusion therapy. If a healthy adult has no underlying disease, pneumonia can be treated with oral medications first. If oral medication is not effective, infusions may be considered. However, if the pneumonia is heavy, larger than one lobe, or if the elderly are in poor physical condition, combined with underlying diseases, such as diabetes, chronic obstructive pulmonary disease, bronchiectasis and other underlying lung diseases, infusion therapy is recommended, and oral medications are less effective. Community-acquired pneumonia oral medication is still mainly penicillin, spore-based drugs, the first choice is amoxicillin clavulanic acid potassium, cefaclor, cefadroxil and so on. Cefadroxil has a certain effect on kidney function, if the kidney function is not good patients should not eat. If the mycoplasma infection, the first choice is azithromycin or levofloxacin, oral medication for three days, if the patient’s symptoms improve without fever can continue to take oral medication for about seven days. If the symptoms do not see well that oral medication is not effective, you can go to the hospital for infusion treatment.