I take naltrexone. It may or may not have helped with curbing cravings— I have nothing really to compare it to. I have no side effects and everything is going well and ultimately it might have something to do with the medicine.
Just a note, this is not advice to not tell your doctor, but when you do tell your doctor they can put it in your file that will go to insurance companies. If you ever have to get insurance in the individual market (which is happening more and more now with people losing jobs) you are likely to get denied. You might just want to mention that you would prefer for your doctor to keep it somewhere in your file that won't get transmitted to your insurer unless you don't forsee health insurance ever being a problem.
Naltrexone is cheap if you are uninsured (like me, because I am one of these people who has been rejected even though I am 27 and completely healthy
) It costs $40 a month from Costco pharmacy.