What can you tell me about cox-2 inhibitors?

Pain med. Cox-1 (cyclooxygenase-1) is an enzyme that regulates prostaglandins, and is important for a healthy stomach lining and kidneys. Inhibition turns this off, leading to gastrointestinal bleeding. Cox-2 (cyclooxygenase-2) is an enzyme that makes the prostaglandins which increase inflammation, pain and fever. So a cox-2 inhibitor is, in effect, a pain blocker.
Cox 2. There is a great deal of information on this. Try goggle.