It's way more complicated than that: there are differences in metabolism as well as size. It varies from drug to drug too, but as a rule of thumb dog needs abou

It's way more complicated than that: there are differences in metabolism as well as size. It varies from drug to drug too, but as a rule of thumb dog needs about twice the human dose (in mg/kg). A 60 lb dog therefore needs about the same as a smallish adult. Here's some FDA guidance on how to translate doses from animals to humans: https://www.fda.gov/media/72309/download https://www.fda.gov/media/72309/download