I've just found this thread. I am on50mg daily Naltrexone currently. For me it helps with my cravings somewhat and I have only ever had success in quitting alcohol whilst taking it. The doctor prescribed it for me after years of failed attempts at sobriety.
I had a 4 month supply in January and relapsed at 5.5 months (I hadn't put any plans in place for when my meds had finsihed so this was my mistake)... And now I have been told I can have up to two more months worth. It's expensive in Australia $130 for a month, but still MUCH cheaper than drinking.
I know nothing about the Sinclair method and realise it's not an allowed topic on here, but the one time i did have ONE drink while taking the meds it tasted disgusting. Not even worth it.
I think anything that can help us achieve sobriety is a good thing, but we need to put in the hard work our selves. There is no magic formula unfortunately.. x