Pain following surgery is among the mild to moderately severe pains that can be relieved by tramadol. It is also used to relieve pain that is severe enough to need opioid treatment, as well as when other painkillers were ineffective or intolerable. Extended-release pills or capsules are used to treat persistent, chronic pain. Long-term tramadol use can lead to habit formation and physical or mental dependence. https://anxietydrug.org/tramadol/