It’s my understanding that a similar compound known as dihydrocodeine (DHC) is sold OTC in some European countries, and is abused in a similar manner to how dextromethorphan (DXM) is abused in the US.
co-codamol is available in the UK over the counter which is a mix or paracetamol (acetaminophen) and codeine. It's not abused that much as i'm aware as you'd need to take enough for the paracetamol to do yourself serious harm in order to get high).