https://www.mayoclinic.org/drugs-supplements/methadone-oral-route/before-using/drg-20075806 This may help, but I think the most important advice is to discuss stopping with your doctor and the best method of doing so. I went straight from methadone to an opiate and just transitioned, so I don't think I can tell you exactly what the w/d symptoms may be, but also look under opiates : https://www.mayoclinic.org/drugs-supplements/hydromorphone-oral-route/description/drg-20074171 to maybe get a better idea of what to expect, but I don't think the w/d from methadone is as severe as long-term opioid use, but I am sure it is very individualized.