About Cinchocaine An amide derivative, most potent and toxic long-acting local anesthetics, A local anaesthetic Mechanism of Action of Cinchocaine Cinchocaine is a local anesthetic. It works by blocking the pathway of pain signals along nerves. It inhibits conduction of nerve impulses and decreases cell membrane permeability to ions at the site of the pain. This prevents an electrical signal building up and passing along the nerve fibres to the brain.