opiate withdrawal
"Tramadol is a controlled narcotic as of August 2014. It's metabolite is an opiate-receptor activator, stronger than codeine. It takes a couple of hours before tramadol is converted to that metabolite by the liver. Tramadol itself possesses an immediate 'uplifting' anti-depressant effect in addition to it's opioid metabolite.

Therefore, tramadol eliminates the deep mental depression and strong cravings that comes with opiate withdrawal. Many people wind up falling in love with the tramadol instead. However, it's best to 'ease into' tramadol doses while lowering the dose of your opiate of abuse. Immediate substitution using a high dose of tramadol may be uncomfortable in some people and could cause seizures."