To me methadone is quite stimulating, but don't forget I've been on MMT for a long time and I don't binge on it anymore. Like an amphetamine, yes, or more precisely, like phenibut. Of all the drugs I've tried, these two share some strange similitudes:two hours to kick in, very long duration of action, a mix between stimulation and sedation (depending principally on the dose), a long stimulating euphoria. I would'nt take more than 5mg of methadone to start off, especially considering your recent history with tramadol, really.