I know in holland they are now treating heroin addicts with just reduced amounts of heroin because their research claims it is less toxic than methadone....well it depends on the med....I personally wouldnt wanna see ANYONE on methadone unless they were a chronic pain patient who is documented to not respond to anything else.
But psychotropics interact with a lot of stuff, and its NEVER a good idea to use a substance that affects mood and personality (ie -- ETOH) when taking medication for Bipolar Disorder or any mood disorders. (Kinda defeats the purpose).
But really, only a trained psychiatrist should answer that question.
Any time methadone comes into the convo... the word relationship should never be spoken.