The medication has helped all 3 issues, a lot. How much it's worked is incredible. I don't know how hard it would've been to stop alcohol without it, but I'm sure I would've failed more before succeeding. Honestly, I'm more impressed by how it's helped me manage my relationship with food. I've spent the last 15+ years obsessing over food. I still think about it far more than people without eating disorders, but my self-worth is not tied to whether or not I eat. I think my mood was better managed on my old antidepressant but things now feel... how I think "normal" is?
That said, I do need to get a medical bracelet of some sort. My doctor didn't mention exactly how naltrexone worked and it wasn't until I stumbled across /r/alcholism_medication that I realized that if I got hit by a car or had some other accident, was unconscious and administered opiates - they wouldn't work, and being on naltrexone could have harmful effects if I underwent emergency surgery if the medical personnel were unaware of my prescription.
They would give the standard amount of opioid (say fentanyl) and if they don't see the desired response they'll up it. Eventually you can "out compete" the naltrexone for the opioid receptor and get an effect.
If they do give 2-3x the dose, they'll be sure to monitor closely after to make sure everything goes well.
So can a slew of other drugs. You should see the drug risks for stuff folks take for autoimmune disorders. It isn't just up to the doctor to mitigate the risks: Patients must do their part as well (blood tests and so on).
And most importantly: So can alcoholism. Alcoholism kills slowly. Withdrawal can kill not-so-slowly. Somehow, do you think the doctor is not responsible for refusing help when the alternative risks include death as well?
That said, I'm not a doctor and there are generally (but not always) good reasons to avoid a drug or another. The risk of drugs by itself usually isn't it, though, as it depends on effectiveness compared to other drugs/methods and comparing the risk of cure to the risk of continued disease.
Dr isn't legally liable for drugs you find on your own.
This is all to say, if you or a loved one is struggling with alcoholism, I highly recommend looking into The Sinclair Method. Check out /r/alcoholism_medication or this accounts recent comment history. That community supports those that use disulfiram as well, but I cannot comment on that medication myself