What are cox-2 inhibitors?

Pain med. 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.
Specific anti-inflam. These are specific non-steroidal anti-inflammatory medications which inhibit an inducible enzyme. They have much less GI toxicity than non-specific nsaids.