I am another 'patient' like the one mentioned above. If she was taking 160 x 0.5g of paracetamol she'd be dead in the ground by now. There's very very simple physics that can be used to remove most of the paracetamol. I'm not going to spell out the process here, but it takes about 25 minutes from start to finish.
I've been addicted to morphine for about a decade now, swinging between buying poppy heads from the net to turn into crude opium tea. Whenever I quit that horrible stuff, I end up in the same loop as the person above, going from pharmacy to pharmacy, usually getting through ~240mg all the way up to ~900mg a day.
As I understand it, codeine converts to morphine after first pass metabolism. I quit the opium tea about 5 weeks ago before the Covid problem got bad, now I'm down to ~300mg.
I've done buprenorphine replacement therapy, that was out of the frying pan into the fire for me. My issue is that I'm a functioning addict, much as I'd imagine the person above is.
Speaking of new ways to help, last year I went to my GP, explained my bind and asked for help. Unlike somebody who's already been prescribed, say, morphine, she absolutely refused to help. My idea was a pure codeine taper controlled via prescription. My only option was the local drug treatment place who got me in trouble with Subutex previous (they had the best of intentions, I'm just a unique case). That instantly triggers social service and I'm a good father, just addicted to morphine and forever battling it.
I hope things change and addiction is treated as less of a moral issue. Anybody can make a stupid decision one night, I challenge anybody reading this to not be able to be able to think of an example in their life. Had that GP decided to help me, I'd have felt safer (I don't like putting unknown quantities of paracetamol inside me, but I've been doing it for 10 years now without any issue) but more importantly listened to.
It's interesting, now all you pharmacists are busy with Covid problems (thanks to all of you for all the hard work), nobody has asked me a single question about what I'm doing with the codeine. If you see someone you suspect of abusing it, please don't deny them. All that is going to result in is making their day even harder, driving from pharmacy to pharmacy.
Instead - I would recommend you ask if they know what the CWE is (acronym for the method I won't describe above). If they do, please do sell it to them and offer local drug treatment support if they want it. I'm 40 now and dealing with it for hopefully the last time, but I've learned that to do it on my own is best.