Copaxone works by modulating the immune system, although its exact mechanism of action is not fully understood. It is believed to act by changing the way the immune system functions, thereby reducing its harmful attacks on the myelin sheath, the protective covering of nerve fibers in the central nervous system. This helps to reduce the frequency of Multiple Sclerosis flare-ups. Copaxone, including Copaxone injection and its generic versions, can be found at CanPharm.