Nonsteroidal Anti-Inflammatory Drugs, or NSAIDs, are a class of medications commonly used to relieve pain, reduce inflammation, and lower fever. They work by inhibiting enzymes called cyclooxygenases (COX), which play a key role in the production of prostaglandins, substances that promote inflammation and pain in the body. Common examples of NSAIDs include ibuprofen, naproxen, and aspirin. While effective for many conditions, such as arthritis and headaches, they can have side effects, including stomach irritation and increased risk of bleeding. It's important to use NSAIDs as directed and consult a healthcare professional if you have concerns.