Epidural steroid injections for low back pain and lumbosacral radiculopathy.

Non-surgical treatments of back pain may have prolonged and lasting benefit. Epidural steroid injections is one of the non-operative managements of back pain. These injections are recommended in patients with signs and symptoms of nerve root irritation. Relief of pain is attributed to the anti-inflammatory effect of the steroid. Patients with acute radiculopathy have better response compared to patients with chronic symptoms. Improvement may not be noted until 6 days after the injection. The depression of the hypothalamic-pituitary-adrenal (HPA) axis lasts 3 weeks. While complications have been reported, these are rare. Intrathecal steroid injection is not advisable since polyethylene glycol, the vehicle used in depot steroid preparations, may cause arachnoiditis.