I.X.
As someone who as been in your shoes and overcome 10 years of bulimia now for over 15 years I will offer what I can. I'm not a fan of drugs and can't offer you much on your specific question. I can tell you that trying to deal with A. addictive compulsive behavior at the point of purging is like trying to stop a leaky hose with duct tape. When you are well enough to loose the binging, you will be well enough to battle the purging.
I'm going to recommend a book that helped change my attitude about food called : How to be Naturally Thin by Eating More. It deals with emotional eating and more. I overcame without medicine or psychologists. I overcame through prayer, maturing, learning to love myself, stopping negative self talk, learning to trust that my body could handle food. I learned not to deprive myself and therefore stop the downward spiral of binge purging. I Learned to eat mostly healthy with occasional treats in reasonable portions. I learned to recognize real hunger vs. emotional hunger and to never eat when It was not genuinely hungry. When the urge to binge was gone, i was well enough to let go of the purging too. I hope you can get a handle on this, your life will be so much brighter.
Eta: I don't think that forgoing the purging while continuing to binge eat until your stomach hurts constitutes real progress. I say this from a point of no judgment having personally been unable to stand up straight from binge eating more times than I care to know. Get to the bottom of the emotional eating and binging primarily and the purging secondarily. One is the symptom of the other. If you continue to binge but not purge, you will still have A. eating disorder by a different name but A. eating disorder non the less- making your life miserable. I hope I'm not being too harsh, I feel for you and you are in my thoughts.