How long does it usually take for an epidural steroid injection to alleviate a herniated disk to take effect?

3-5 days: Sometimes patients report improvement later (1-2 weeks) but most notice improvement earlier. If it does not work by the 2nd week then it is not going to do any good.

48-72 Hours: Epidural steroids work by locally depositing steroid (an anti-inflammatory) in and around an area of inflammation causing nerve root compression resulting in pain. The steroid usually takes 48-72hrs to take effect and works for about 2 weeks. Sometimes 1-3 injections is enough to work not only palliatively, but also therapeutically to improve pain from nerve impingement.

Steroid injection: The steroid injection takes a few days to be effective. The level of relief depends on the severity of your conditions. The duration also varies.

Tricky: An epidural steroid injection may provide immediate relief just after the procedure if a numbing medication is mixed with the steroid; this will wear off in 3-4 hours typically. The steroid takes 2-4 days to kick in, but some people don't notice it for over a week. You may get partial relief or it may be excellent, but come right back and another epidural may be needed.

3-4 days: Initially it can take 3-4 days for the steroid to provide relief but that effect may take up to 10-14 days in some people. It is not uncommon to hear patient say it took two weeks to get relief.

Tricky: An epidural steroid injection may provide immediate relief just after the procedure if a numbing medication is mixed with the steroid; this will wear off in 3-4 hours typically. The steroid takes 2-4 days to kick in, but some people don't notice it for over a week. You may get partial relief or it may be excellent, but come right back and another epidural may be needed.