I would be surprised if Nice was influenced by possible future shortages, but I could be wrong. I haven't seen the research they are basing their recommendation on, so I can't comment on that. It is supposedly to stop addiction although the alternatives are, I would have thought, more addictive. Of course, there nothing to stop people buying paracetamol or aspirin at the supermarket or chemist at a much lower cost than getting them through a prescription. So cost might be a big factor as well. PS I buy my own paracetamol and take one each night to get some sleep!