I do think that Bluebelle makes the relevant point about all of this. Which of us would be willing to be the recipients of any such items which had been stored goodness knows where and how.
It is sad that there is so much waste, but surely each person can do their own little bit, particularly those of us on on-going medications and only put in repeat prescriptions for items when required.
A few years ago, I, very suddenly, became allergic to the ostomy appliances I used, and the change of these meant I was left with approximately four to six weeks supply of these which I could no longer use. Obviously, all in sealed boxes. I was most reluctant to throw them away and did, eventually, find a charity that shipped such items out to countries where there were severe shortages of such items.
But medications, I think the only really safe way is a to dispose of them. For those of us who do not have to pay for our prescriptions, surely we should only be given four weeks at the time, but I can understand those who have to pay large amounts try to get three or more months supply at the time.