Occasionally painkillers may be given by infusion into the space just outside the membranes surrounding the spinal cord. This is known as epidural analgesia. Sometimes the painkiller is given into the fluid around the spinal cord - this is known as intrathecal analgesia. These specialised techniques are usually used only to control severe pain and are managed by anaesthetists.
If you need to have your painkillers by injection or infusion, your doctor or nurse will discuss this with you.
Please see our leaflet on Strong Painkillers for more information.