GoodThinking-Depends: on contrast agent, dosage & how cleared (metabolized, liver &/or kidney). Steroid injections do not have a great track record of success for back pain, especially over time. Suggest study the work of both Robin McKenzie, https://www.google.com/search?q=Robin+McKenzie & John E Sarno, MD, https://www.google.com/search?q=John+E+Sarno.
Answered 2/20/2016
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