Things my vet has said to me regarding telazol, xylazene, micotil, and many other drugs that we handle on a regular basis - and tend to get too comfortable with:
Anesthesia is controlled euthenasia.
Decimal points kill - measure exactly every time.
Find something else to be 10' tall and bullet proof about.
So, as much as we don't want to hear it, we are not invincible. We are being trusted by the vets that supply us with these drugs to act responsibly. They are putting their license on the line for us, the least we can do is follow some simple safety procedures.
Think of the ramifications to our industry if a few careless mistakes started causing vets to not be able to provide our meds and we had to start paying them to do all of the work that we do ourselves???? Nightmare!