A member asked:

If you open up the back of someone who had a lumbar epidural steroid inj 1 yr ago would you see white powder in the epidural space?

11 doctors weighed in across 4 answers

No: The white powder you see in the vial before they reconstitute it is the dehydrated, concentrated form of the drug. After it is injected, it is metabolized within a few weeks. There would be no trace of it left.

Answered 6/10/2013

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Dr. Brian Le answered

Specializes in Pain Management

Epidural medication: The medication will be absorbed into the vascular system. It is then metabolized. No white powder should be seen.

Answered 9/1/2013

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Dr. Hooman Melamed answered

Specializes in Orthopedic Spine Surgery

Epidural steroids: On few occasions the white material can be seen which has become stuck to the yellow ligament covering the nerves.

Answered 9/1/2013

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Dr. Qamar Khan answered

Specializes in Pain Management

Usually No: However if surgery is done shortly after an epidural injection and a particulate steroid was used then I have heard from surgeons who have said they see the white powder.

Answered 8/2/2014

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