I am feeling a bit embarrassed about the last post. I thought the drops were prescription items as:
1. The hospital consultant prescribed them and wrote to the GP asking for them to be put on repeat.
2. The pharmacy said they had to be obtained as a special order.
I then learned that they can be obtained as an over the counter item for about £5-6 if you go to the right pharmacy. This made me think about why they were prescribed, with all the attendant costs when a phone call to say "buy this" would have been enough. I then thought that even though they are not a medicine, Bugs needs them solely as a result of this awful illness. I am therefore happy to carry on this way.
I have also learned that I owe tax on the Carer's Allowance. What a generous country!