I've used it a couple of times when waiting on packs..it takes away all physical symptoms of opiate withdrawal. There's a "master doc" if you look around on reddit, kinda explains it all. Me personally I take 50-70mgs and that holds me about 10-12 hours. I should stress the way I've used it is not recommended. It's advised it should only be used when you're done for real because some people report inability to feel opiates at all after repeated use. This produces 0 euphoria or any positive effects besides keeping you well/not dope sick. AMA