Our dog needed a pet product called Atopica, its also a human product used in transplants called cyclosporine. Currently for dogs is £56 for like 15 capsules, prescribed under the cascade (a vet prescribing a human drug or a doctor prescribing off license sometimes have to do this). For human branded is around £3-4 per pill.
Our dog needed 3 capsules per day, and as it brand new at the time and almost double that cost for dogs and wasn't available in the UK at that time so the insurance wouldn't cover it.
In the end we picked the stuff up from an Turkish Pharmacy for about £1 a pill, sent via fedex, so was here next day.
Compare UK prices to US/EU prices.
Hayfever wise, the 1st generation AH which is often sold as a sleep aid, 16 tabs are around £2 on own brand. In the US a company called Kirkland do bulk packs, you can get 300 tablets for about £6. Aspirin 1000 tablets are £9, 1500 Ibuprofen are £15,Paracetamol 1000 are £18. I have even seen 5,000 tablet drums while over there. Yet here they look at you like your going to off yourself if you wanna buy 2 packets