N-Methylpiperidin-4-amine dihydrochloride is primarily used in pharmaceutical research and development as a key intermediate in the synthesis of various bioactive compounds. Its structure makes it valuable in the creation of molecules targeting neurological disorders, such as Alzheimer's disease and Parkinson's disease, due to its ability to interact with specific receptors in the brain. Additionally, it is utilized in the production of ligands for G-protein-coupled receptors (GPCRs), which are critical in drug discovery for treating a wide range of conditions, including pain management and psychiatric disorders. Its role in medicinal chemistry extends to the development of potential anticancer agents, where it serves as a building block for compounds designed to inhibit tumor growth.