N&PD Moderators: Skorpio Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why does methadone withdrawal last so long compared to short acting opiates? JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. Members who reacted to message #10 All (1) Like (1) Feb 15, 2021 MyrandaK Bluelighter Messages 213 Reaction score 90 Points 0 Loading… Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why does methadone withdrawal last so long compared to short acting opiates?