A prescription drug called tapentadol is used to treat moderate to severe pain. Although it is a member of the opioid analgesics class of medications, its mode of action differs slightly from that of conventional opioids. Tapentadol is a prohibited substance in the UK that may only be obtained with a legitimate prescription from a doctor who is licensed to practice medicine. https://dstouria.com/blogs/7960/Tapentadol-100-mg-in-the-UK-Uses-Safety-Legal-Status