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Labor and delivery: Pain medications

Pudendal block

Description

A pudendal block might be used shortly before delivery to block pain between the vagina and anus (perineum). It can also be used to relieve pain during the repair of a tear after delivery. The anesthetic is injected into the vaginal wall near the pudendal nerve and takes effect in 10 to 20 minutes.

Pros

A pudendal block relieves pain in the lower vagina and perineum for up to an hour. Negative effects for the baby are rare.

Cons

A pudendal block might not work or might affect only one side of the perineum. An allergic reaction is possible. Rarely, a pudendal block can cause an infection at the injection site, and injecting the medication into a vein might affect your central nervous system or heart.