Tramadol is a prescription medication used to treat moderate to moderately severe pain. It is classified as an opioid analgesic and also has some properties of a serotonin-norepinephrine reuptake inhibitor (SNRI). Tramadol Effective for treating moderate to moderately severe pain, such as pain from injuries, surgeries, and chronic conditions like osteoarthritis. Tramadol works by binding to opioid receptors in the brain and spinal cord, which alters the perception and response to pain.