I too a very very glad that I am of an age to get free prescriptions, and also my OH. He has a huge amount of drugs which keep him going, but with his illness he could have got them free at any age in fact.
Sometimes when I am at the surgery and see people paying out for their drugs I am bowled over by the cost. Some drugs cost more on prescription than they do over the counter!
I think your only way forward is pre-payment, I think it is cheaper if you do it by the year.
Scottish Government Proposes Price Cap On Essential Foods
Alphalock - like wordle but harder!
