Binge eating

I've struggled with binge eating, hospitalized at one point due to malnutrition over a year ago, suspected I have a form of bulimia but I don't purge I just binge. I recently got prescribed naltrexone to help stop... Anyone else ever been prescribed this for binge eating, its supposed to be for opiod addiction and alcohol addiction so I'm confused as hell now. Curious if anyone has been on this med and did it help? Thanks