Tramadol is a synthetic opioid analgesic, a type of pain medication. It is used to cure moderate to moderately severe pain. Tramadol is commonly prescribed for various types of pain, including postoperative pain, injury-related pain, and chronic pain conditions. Tramadol works by binding to mu-opioid receptors in the central nervous system and inhibiting the reuptake of serotonin and norepinephrine.