After getting pneumonia, some patients experience drowsiness, but there is no increase in body temperature. Pneumonia occurs through the invasion of pathogens, such as viruses and bacteria, and there is a state of inflammatory reaction in the mucous membranes of the lungs, and the body’s immune system will be very active. This time will consume a lot of energy of the body, including the appearance of fatigue, mental depression, and even lethargy, the inflammation of the lungs is very obvious, the mucosa of the airways have congestion, edema, so that the lung function is reduced, causing hypoxia, which will make the cerebral blood vessels also appear hypoxia, thus aggravating the symptoms of lethargy, but the patient does not have a fever. Clinically, according to the time when the symptoms are more obvious, the patient can be allowed to rest appropriately, supplemented with some energy synergists, and administered in the form of intravenous drip to relieve the symptoms.