> But most of that knowledge was already available from the clinical trials Why would there be clinical studies of a drug that is never intended for human use?

> But most of that knowledge was already available from the clinical trials Why would there be clinical studies of a drug that is never intended for human use? Clinical studies are expensive, and no drug company would do human study on a veterinary drug just to see what happens (leaving alone ethical issues with getting study subjects). > animal studies for the drugs anyway. Animal studies only go so far...