Nonsteroidal anti-inflammatory drugs, or NSAIDs, are a group of medications commonly used to relieve pain, reduce inflammation, and lower fever. They work by blocking certain chemicals in the body that cause inflammation and pain, making them effective for conditions like arthritis, headaches, and muscle aches. Some popular NSAIDs include ibuprofen and naproxen. While NSAIDs are generally safe for short-term use, they can have side effects, especially when taken in high doses or for long periods. These side effects may include stomach upset, ulcers, and increased risk of heart problems. It's important to use NSAIDs as directed and consult a healthcare professional if you have concerns.