As vets, we regularly get stick over animal medicines. Does my dog need that vaccine? Why did you give my cat that wormer? Isn’t there an alternative treatment with fewer side effects? These are all clinical decisions, and we’re all prepared to debate the risks versus the benefits of any medicine choice. But one of the things that really hurts is where we are constrained by the law, do our best in accordance with the law, and then get slated online or in person for it. My colleague Pete has written an excellent blog about vets fees in general, but he didn't cover the medicines side. So, in this blog, I’m going to explore the UK’s medicines laws in a little more detail, and try to explain some things that people find confusing... For example, why it is that veterinary drugs are more expensive than human ones, why we can’t prescribe the cheaper human version, or why we can't accept unused drugs back into stock for a refund.