Is it legal to purchase Fina in the US? If so what criteria does the purchaser have to fulfill, e.g. does one have to be a vet, a farmer etc, or can just about anyone buy it?
yes, you can find it online very easily. it is legal. you can go buy it and then you have the choice of doing it orally, sublingually, transdermally, or injectible. read up on it more.