There are three main types of pain relievers: nonsteroidal anti-inflammatory drugs (NSAIDS), paracetamol, and opioids. Each type works in a different way. Most people only need to take pain relievers for a few days or at most a few weeks, but some people need to take them for a long time depending on the cause of the pain and the number of times depending on the type of pain reliever that works. in how long.