<prompt> Etanercept is a biological disease modifying agent used in the management of rheumatoid ahritis. its mechanism of action isTNF alpha blockedCOX2 inhibitionIL 6 inhibitionStabilization of mast cells  <response>: TNF alpha blocking drugs are used in Rheumatoid ahritis and crohns disease. these include adalimumab ceolizumab etanercept infliximab golimumab Refer kDT 6e 883 