Meperidine belongs to the class of medications known as narcotic analgesics (pain relievers). It is used to treat moderate-to-severe painassociated with many medical, surgical, obstetrical, and dental procedures. It works to decrease pain by acting on the brain to increase pain tolerance. Meperidine works very quickly and will usually begin to relieve pain within 15 minutes. This medication should not be used to treat chronic pain.