Jeg hadde anbefalt O-Desmethyltramadol

http://en.wikipedia.org/wiki/O-desmethyltramadol :

O-Desmethyltramadol has recently become available through online "gray market" sources. O-Desmethyltramadol was received with pretty good reception, most users finding the substance to be at least twice as potent than just tramadol itself. It was also able to be used more euphorically effective via routes other than just orally, upping its abuse potential past that of tramadol's