Sorry dbocoke that only 2 of us attempted to answer your actual questions. If you are in fact using Xylazine/Telazol mix, let me reiterate what I've already said and give you some facts through experience. Mix 5cc of Xylazine and not 6cc like many do because it is the breaking line in effective potency. My deer that normally go down with 2cc of tranq mixed 5cc per bottle will all too often find me sneaking up behind them to push another 1/2cc in them when I use 6cc per bottle. When reversing with Tolazine you match the exact amount of Tolazine with what you gave to knock them down and give it intramuscular, aspirating your syringe to make sure you are not in a vein. Contrary to what you've been told above, DO NOT wait to give the reversal. In fact give it as quickly as possible. Reason: Your worst enemy when a deer is under the influence of Xylazine is asperated pneumonia(which results in death 10 days to 2 weeks later), caused by the deer's inability to swallow while under the influence of the Xylazine, and brought about when stomach contents intrude into their throat. They suck these stomach contents into their lungs instead of swallowing them back down due to their inability to do so. I dart, I saw, I move, and/or I treat, I reverse, and they're always up walking around easily within the time these guys are telling you to wait. Trust me on this. I have the experience of tranquilizing well over 150 deer in the last 3 years, all of which were reversed as soon as possible, and all without incident ( whatever that incident would be I have no idea) as well as the corroboration of a vet that has mentored me and is very involved in the deer industry and raises deer himself. Note: Book smart and field smart can be 2 different things!!