An analgesic drug, also called simply an analgesic, pain reliever or painkiller, is any member of the group of drugs used to achieve relief from pain (that is, analgesia or pain management). It is typically used to induce cooperation with a medical procedure. Although analgesia and anaesthesia are neurophysiologically overlapping, and thus various drugs have both analgesic and anaesthetic effects, analgesics are conceptually distinct from anesthetics, which temporarily reduce, and in some cases, eliminate, sensation.