Etanercept contains the active substance called Etanercept with protein structure. Etanercept belongs to a group of medicines called Tumor Necrosis Factor (TNF) Blocking Agent. Etanercept produced by recombinant DNA technology in a Chinese Hamster Ovary (CHO), mammalian expression system. People with autoimmune diseases have excess amount of TNF-α in their bodies which can cause inflammation and lead to painful, swollen joints and dry, itchy, red, scaly patches (psoriatic skin lesions) anywhere on the body. This medicine blocks the activity of TNF-α and prevents TNF-α interactions with its cell surface receptor and as a result, helps to improve inflammation process in your body.