Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you today. I do apologize for the delay, but I have now fixed your mistaken categorization so we can discuss Prissy's situation.
Now given the drugs you have reported, I suspect Prissy is/was due to have a procedure done under anesthesia.
Acepromazine is a sedative agent that we use to relax patients before anesthesia. Propofol is a short acting injectable anesthetic that we use to knock them out so we can place a breathing tube with a view to starting gas based anesthesia. Both can be given intravenously, so this is why she has a catheter with a T-port to injection into. So, these are common drugs used in the first 2 steps of starting an anesthesia.