Anticholinergic refers to a class of drugs that block the action of a neurotransmitter called acetylcholine. This neurotransmitter is involved in many functions, including muscle movement and the regulation of the autonomic nervous system. By inhibiting acetylcholine, anticholinergic medications can help treat various conditions, such as asthma, COPD, and certain types of incontinence. These medications can also have side effects, including dry mouth, blurred vision, and constipation, due to their impact on the body's ability to produce secretions and regulate certain functions. Anticholinergics are often prescribed with caution, especially in older adults, as they may increase the risk of cognitive decline and other health issues.