This makes the real effects of epidurals on FHR hard to assess because, in almost all randomized trials, epidurals are compared with meperidine or other opiate drugs. (sarahbuckley.com)
The most commonly used pain relievers are probably meperidine (Demerol Rx), fentanyl patches (Duragesic Rx) and morphine but there are several other medications that can be used. (vetinfo.com)
After the surgery I put dogs on meperidine (Demerol), a narcotic pain reliever, for several days. (2ndchance.info)