As an addition to my earlier post...the PA who stated I wouldn't experience withdrawal, prescribed me a Medrol dose-pack and the muscle relaxant cyclobezeprine (Flexeril). Other medical/psychiatric conditions I have are hypothyroidism and bi-polar disorder/depression for which I take levothyroxine (Synthroid), divalproex (Depakote) and bupropion (Welbutrin). The medication information for the Medrol dose-pack states cautious use in those with hypothyroidism, psychiatric history, being treated with an anti-convulsant, and on bupropion, as it could produce mood changes and affect the seizure threshold. I was told by the psychiatrist not to abruptly stop the divalproex and keep taking the bupropion, as it could trigger seizures. All of this information is alarming. I don't know which is worse...the pain or the fear of adverse drug interactions/physical and psychiatric side effects of taking the drugs to treat the pain!