Folitrax 20 Injection works by decreasing the activity of the body's immune system. It helps reduce pain, stiffness, and swelling in your joints and slow down the progression of bone and joint damage. This will help you do normal daily activities more easily and thus improve your quality of life. This medicine should be used at the same time each day to get maximum benefits. Keep using it even if you feel well because it is preventing future harm as well as improving your symptoms.