INTRODUCTION Pamidronate and other bisphosphonates (bisph) have an anti-nociceptive effect in animals. In humans, IV pamidronate is analgesic in patients affected by numerous painful conditions, including cancer bone pain, complex regional pain syndrome (CRPS), ankylosing spondylitis, and rheumatoid arthritis. The investigators have explored the effect of IV pamidronate in the management of chronic low back pain (CLBP), a worldwide public health problem in terms of lost workdays, treatment costs, and suffering.