Are there any long term side effects of an epidural used during labor and delivery?

Almost never: It is very rare to have any long term side effects from your epidural if you are otherwise healthy. Women who are at increased risk for bleeding are at increased risk for complications and need to talk to the anesthesiologist carefully. Back pain is just as common in women who deliver with or without epidural.

No, with exceptions.: The vast majority of women have no residual symptoms after delivery, which is why it is so en vogue and highly recommended. Rarely, it can cause persistent headache or low back pain. These side effects are so rare and its beneficial effect on maternal comfort during labor so significant that it still considered the best option for intrapartum analgesia.

Few: In general a properly placed epidural has few side effects. Most of the problems are minor and occur around the time of the epidural. It would be very rare to have any long term complications.