Anticholinergic drugs, also known as antimuscarinics, are medicines that block or reduce the effects of acetylcholine, a chemical messenger that transmits signals between nerves and muscles. Anticholinergic drugs are widely used for treating chronic obstructive pulmonary disease (COPD), asthma, peptic ulcers, Parkinson's disease, and motion sickness. Motion sickness is one of the main...