this is the manufacturer I get mine from. You have to have the dr write "mallinckrodt pharmaceutials only." (I think I get mine at CVS. You just have to call around and see who carries this manufacturer.

I can't say in reality if this is better than any other manu comp, I do know which companies in India I will never use. Typically, before going on a med that is vital, I will research online which manu if better. Example, I take Toridol IM at home for pain prn on occasion. Helps for about 24 hours. I went to get a refill and gave myself a shot and it was like I had injected water. Zero help. I looked up the previous manuf and the new one, different. I dumped them and found a place that could give me the old manufacturer, had the script transferred to them and got the refill I could get in 5 days.

If a medication give you a headache, for example, you can look up online and find out that people who get that drug from "x manuf," have headaches. Switch to a different manufacturer, and headaches gone. I do know for all meds, I believe i should say, we should not be taking a different manufacturer each month when we get a refill. They are not all created equal. If your pain meds suddenly don't help this month, are they the same? Due diligence with all generics.
https://www.mallinckrodt.com/products/generics/addiction-treatment-products/naltrexone-50-mg