ELECTROMOTIVE ADMINISTRATION OF GUANETHIDINE FOR TREATMENT OF REFLEX SYMPATHETIC DYSTROPHY - A PILOT-STUDY IN 8 PATIENTS

Persistent neuropathic pain is associated with diagnostic and therapeu tic challenges that may be very difficult to resolve. This report desc ribes eight patients with incapacitating, posttraumatic neuropathic pa in characteristic of reflex sympathetic dystrophy (RSD) who were treat ed by electromotive administration of guanethidine into affected areas of skin. Following 1-5 treatments, six patients experienced complete resolution of all superficial symptoms of hyperalgesia, pain, pallor, coolness, and sweating of the affected areas. One patient demonstrated partial relief of these symptoms, and one patient failed to respond. The results of this preliminary study suggest that electromotive admin istration of the sympatholytic agent, guanethidine, may be useful in t he treatment of some types of neuropathic pain. These findings justify the implementation of further controlled studies.