Caregiver:Needs a Prescription from a Vet - then Do it Yourself
Demerol etc. (meperidine / pethidine) is synthetic opiate agonist which acts on the central nervous system (CNS) to relieve pain. Meperidine (known as pethidine in many nations) was introduced as a potent analgesic in the 1930s and was originally found to be useful for muscle spasms.
For dogs and cats, meperidine is used for acute pain management in operative or medical procedures and trauma.