A Nonsteroidal Anti-Inflammatory Drug, or NSAID, is a type of medication commonly used to relieve pain, reduce inflammation, and lower fever. These drugs work by inhibiting enzymes in the body that contribute to inflammation and pain, making them effective for conditions like arthritis, muscle aches, and headaches. NSAIDs are available over-the-counter and by prescription, with common examples including ibuprofen and naproxen. While they are generally safe for short-term use, long-term use can lead to side effects such as stomach irritation, kidney problems, and increased risk of heart issues. Always consult a healthcare professional before starting any medication.