Dolo-650 Tablet belongs to the group of medicines called analgesics (pain killers) and antipyretics (fever-reducing agents) used to reduce fever and treat mild to moderate pain. It is also used to relieve headaches, migraine, toothache, period pain, back pain, muscle pain, and rheumatic pain. Pain and fever are caused by the activation of pain receptors due to the release of certain natural chemicals in the body, like prostaglandin.