NHS wastage

[Supernova190188]

I keep seeing Facebook posts about buy your own paracetamol for only 16p from a shop as it costs the NHS £10 each time, why does it cost the NHS £10? They have got to be one of the worlds largest purchasers of paracetamol, with their buying power they should be paying sod all, how on earth can wastage of money like this be allowed? Is there any truth to this inflated cost? If so then totally unnecessary spending like this needs to be eliminated and people doing it sacked.