What is the primary action of NSAIDs in pain management?

The primary action of nonsteroidal anti-inflammatory drugs (NSAIDs) in pain management is to reduce inflammation and relieve pain. NSAIDs work by inhibiting the enzymes cyclooxygenase-1 and cyclooxygenase-2, which play essential roles in the formation of prostaglandins. Prostaglandins are chemicals in the body that promote inflammation, pain, and fever. By reducing the production of these substances, NSAIDs can alleviate both pain and inflammation, making them effective in treating various conditions, including arthritis, muscular pain, and other inflammatory disorders.

The other options do not accurately reflect the primary mechanism of action for NSAIDs. Enhancing pain sensitivity contradicts the therapeutic purpose of these medications. Promoting muscle relaxation is more closely associated with muscle relaxants, not NSAIDs. Increasing circulation is not a direct effect of NSAIDs, as they primarily focus on inflammation and pain relief rather than modifying blood flow.