Your vet hands you a box, says the name once, and you are in the car before you think of a question. Every page here is written from that medicine's FDA-approved label and from the FDA's own safety notices: what it is approved to treat, in which animal, what the label warns about, what the field study found, and anything the FDA has said since. Nothing is invented, and there are no doses anywhere, because the dose belongs to the vet who examined your animal.
The drugs a vet reaches for when a dog will not stop scratching.
Anti-inflammatories and the newer monthly injections.
The monthly and yearly preventives, and what the FDA has said about them.
What each one is approved to treat.
The long-term medications: heart failure, thyroid, diabetes, Addison's, nausea, appetite.
Approved for fear and anxiety, and what the label says about each.
No animal label exists for these. What that means, and the rule that allows it.
Every approved animal medicine in the United States has a label the FDA signed off on, and the FDA publishes the whole list. The labels quoted here are on DailyMed and Animal Drugs @ FDA, and each page links the exact ones it used.