I think it depends on what they inject.  I get Depo-Medrol injections.
(not in the spinal column but at the nerve trigger points in my lower
back)   They are long acting and usually help me from 6-8 weeks at a
time.  It is mixed with Lidocaine so usually give some relief
instantly and by the 2nd or 3rd day I'm much better.  When she hits
just the right spot, and starts to squeeze the medicine in, it stings
a bit OUCH, but is SO worth it.

Several months ago, the new nurse drew up Kenalog injectable instead
of Depo-Medrol because the doc didn't specify and it only lasted a few
days.  NOW, I make certain she specifies the DM/Lidocaine mix.  I've
had to put off my back surgery since my husband's accident, because I
have to care for him right now, so I can sympathize with you.

My sister-in-law's mother was bedridden because of her back, until
they put in a portable epidural IV of morphine.  Now, she's back to
playing golf.  Good luck and don't be scared.  They'll give you
injections of lidocaine to deaden the area first if you ask them. (I
think they do it anyway)  I'll be praying for you.
Mag

No kidding and the stupid anesthesiologist kept telling me to hold still
which I was trying to do but my labor pains were only 30 seconds apart
and holding still was nearly impossible. It was also pissing him off
that I was trying to breathe through the contractions. Thought the
doctor was going to rip his head off and I did hear a heated
conversation between the two but off out of my ear shot. I had the
epidural because my neurologist told me he didn't want me to be put
under if the question ever came up. I poo-pooed him but there I was
needing the information. 28 years ago, I was the only C-section awake in
the recovery room. Lots of snoring women and me. And the recovery room
nurse was the one that had first checked me when I was admitted three
days earlier. She looked at me, suddenly recognized me, check the chart
and then said out loud, Good Lord!!
Told John he could have the next one. Jen is an only child. :)
Duckie

Sorry this is incorrect information.  There is a space, BEFORE they actually
get into the spinal column, that they shoot for with an epidural.

When you get a spinal they actually DO get the medication, IN the spinal canal.
But not with an epidural.

In child birth, an epidural can be given and maintained for hours while in
labor.  Where as a spinal block can only be given just immediately before
delivery, as it effectively stops labor. With an epidural labor contiues and
you can even push.
Char

"Remember, I'm pulling for ya'. We're all in this together." Red Green