If you have tappered off both why in the world even consider taking either again...you are one of the lucky ones if you are clean of both. If you decide to take just remember what you just went through...you will have to start ALL OVER again...not a wise decision...
I agree with theeagle,it wouldn't be wise.
Why on earth would you do that? If you successfuly taper the methadone you should have reached a goal. Why would you want to get back on a narcotic? And back on a narcotic with the idea of getting off right away. Maybe I am confused....but I would have to say that it would be most unwise.