Tramadol is a prescription medication used to treat moderate to moderately severe pain. It is classified as an opioid analgesic, but it works differently than traditional opioids, affecting the brain's perception of pain by binding to specific receptors. Tramadol can also inhibit the reuptake of serotonin and norepinephrine, contributing to its pain-relieving effects. Due to its potential for dependence and side effects, it should be used under medical supervision.