If you switch from an "actual" opioid to Tramadol it's possible to do so with zero withdrawal effects. Converesly, if you are addicted to Tram you can escape all withdrawal by switching to another opioid. This only means one thing.
Like I've said, ESFitness went to heroin when his Tram dried up. Tram addiction is really nasty, I can tell since if I use Tram for several days I then have several days of extreme anxiety, insomnia etc. Tram is really wonderful mentally if you're depressed or anxious, amazing mood boost from the first pill if heavy enough. At least for me. The serotonergic and adregenic effects are behind some of it I believe.