A high level of carbon dioxide in the blood, known as hypercapnia, should be treated as soon as possible by seeking medical attention. Treatment includes the use of respiratory stimulants, bronchodilators, oxygen and assisted breathing. In mild cases, respiratory stimulants and bronchodilators can be used to help increase ventilation. Commonly used respiratory stimulants are Niclosamide and Lobelin. Commonly used bronchodilators include the anticholinergic tiotropium bromide and the selective adrenergic receptor agonist formoterol. They can dilate the bronchial tubes by stimulating respiration and accelerate the discharge of carbon dioxide from the body. In general, patients can be given continuous low-flow oxygen, the use of non-invasive ventilator is also aimed at assisting the patient’s breathing. If the patient’s condition is critical and serious, emergency tracheotomy and tracheal intubation can be used to achieve the purpose of oxygen supply. Hypercapnia is an emergency situation and should be treated as soon as possible by contacting a physician.