The most commonly used anticholinergics are ipratropium bromide, tiotropium bromide, gronoponium bromide, and those ending with the word ammonium bromide tend to be anticholinergic drugs. Most commonly used in patients with chronic obstructive pulmonary disease, they act on cholinergic receptors in the airways, causing bronchodilation and having a calming effect on asthma, while reducing the production of airway secretions and reducing sputum. In patients with chronic obstructive pulmonary disease, they are divided into ABCD groups according to their symptoms and the number of acute exacerbations, thus selecting the appropriate bronchodilator drugs. One of the major groups is cholinergic blockers, which are inhaled drugs that gradually improve lung function with long-term application. The application of cholinergic blockers, which have minimal side effects, will also act on the prostate, as well as on some receptors in the eye, so patients with prostatic hyperplasia, urinary retention, or patients with glaucoma should use them with caution, as they may aggravate urinary retention and lead to glaucoma recurrence.