Diphemanil Mesylate is primarily used as an anticholinergic agent, which means it helps to block the action of acetylcholine in the nervous system. This property makes it effective in reducing excessive muscle contractions and spasms, particularly in the gastrointestinal tract. It is often prescribed to manage conditions like peptic ulcers, irritable bowel syndrome, and other gastrointestinal disorders where muscle relaxation is beneficial. Additionally, it can be used to control excessive sweating (hyperhidrosis) by inhibiting the activity of sweat glands. Its ability to reduce secretions also makes it useful in certain surgical procedures to minimize saliva and respiratory secretions, ensuring a safer and more controlled environment during anesthesia.