Benzetimide hydrochloride is primarily used in the field of pharmacology as an anticholinergic agent. It functions by blocking the action of acetylcholine at muscarinic receptors, which helps in reducing excessive muscle contractions and spasms. This makes it effective in treating conditions like Parkinson's disease, where it helps to alleviate symptoms such as tremors and rigidity. Additionally, it is utilized in managing gastrointestinal disorders by reducing spasms and motility in the digestive tract. In research settings, it serves as a valuable tool for studying the role of muscarinic receptors in various physiological processes. Its application extends to the treatment of certain types of poisoning, particularly those involving organophosphate compounds, by counteracting the effects of excessive acetylcholine activity.