I know a lot when it comes to benzos.....xanax is one of the most addictive, but if you use it rarely you shouldnt develop a physical dependance. The reason you have more energy and feel relaxed after using MDMA and then xanax for the comedown...the last 2 letters of MDMA are for methamphetamine....i think the full word is methyldioxymethamphetamine. there's your extra energy, and the contentedness and relaxed feeling is from the minor euphoria from the xanax and its central nervous system depression affect. I think the word is synergy, when combining a CNS stimulant with a CNS depressant. Kind of like drinking a lot of alcohol and mixing it with cocaine.