Tramadol is an opioid analgesic used to treat moderate to moderately severe pain. It is a synthetic analgesic that works by binding to mu-opioid receptors in the brain and inhibiting the reuptake of serotonin and norepinephrine. Tramadol is available in various formulations, including immediate-release tablets and extended-release formulations. Tramadol is prescribed for the treatment of moderate to moderately severe pain, such as pain following surgery, injury, or chronic pain conditions.