Elderly people with chronic obstructive pulmonary disease (COPD) who take tiotropium bromide have severe dry mouth, which is mainly relieved by drinking more water, and the drug needs to be discontinued if necessary. Tiotropium bromide is a kind of asthma medication, for chronic obstructive pulmonary disease and its related dyspnea has the role of maintenance treatment, can effectively relieve the discomfort symptoms, but after using the drug may produce certain adverse reactions, such as dry mouth, the patient should drink more water, usually will be relieved. However, if the dry mouth is severe and cannot be relieved by drinking water after taking the medication, it may be necessary to stop the medication and change to another medication if necessary. Tiotropium bromide must be instructed by a doctor to take the drug, patients should not take the drug on their own, especially not overdose.