Your welcome,
He’s almost certainly in the addiction grip by now and although he may have genuine pain it’s the most commonly used method of getting opioids. The paracetamol will definitely do massive damage if he doesn’t get it under control and this site is littered with people who have damaged their insides with paracetamol or ibuprofen. My advice is get to the doctors with him and assistant with the addiction and the pain, ever addict says “I’m not addicted” The euphoria of codeine gives us a fabulous sense of security and then destroys you as a person. It’s nothing no be ashamed about so don’t ever let him feel like he’s done wrong. It’s a horrible drug and has ruined many people’s lives. I wish you the very best of luck.