I've never heard about it. I think I'll consult with my doctor about it to see what he thinks about this medicine. I have this good habit of discussing with my doctor about any preparation I have been advised or heard of it before I decide to take it.
Usually, because I have a severe cough, I use codeine. But I'm strictly watching the dose because it's dangerous, and I don't want to have more health problems.
Since I live in Europe, it's easier for me to buy them from one website I found by searching for "codeine piller". But as I said, my doctor tracks the dose.