A Randomized Comparative Study of Pulsed Radiofrequency Treatment With or Without Selective Nerve Root Block for Chronic Cervical Radicular Pain.

Background: We demonstrated a combination of pulsed radiofrequency (PRF) and cervical nerve root block (CNRB) via a posterior approach was superior to a transforaminal epidural steroid injection through the anterolateral approach for cervical radicular pain in a previous study. This randomized trial was conducted to determine the comparative efficacy between CNRB, PRF, and CNRB + PRF for cervical radicular pain.

Methods: A prospective and randomized design was used in this study.

Subcutaneous injection of botulinum toxin a is beneficial in postherpetic neuralgia.

Objective: To assess the benefits of subcutaneous injection of botulinum toxin A (BTX-A) for the treatment of postherpetic neuralgia (PHN).

Design: We investigated the therapeutic benefits of BTX-A in subjects with PHN in a randomized, double-blind, placebo-controlled study. Sixty subjects with PHN were randomly and evenly distributed into BTX-A, lidocaine, and placebo groups.