Both patients experienced immediate, significant and durable relief  as measured by the PCL (score minimum 17, maximum 85). In both  instances, the pre-treatment score suggested a PTSD diagnosis whereas  the post-treatment scores did not. One patient requested repeat  treatment after 3 months, and the post-treatment score remained below  the PTSD cutoff after 7 additional months of follow-up. Both patients  discontinued all antidepressant and antipsychotic medications while  maintaining their improved PCL score.
CONCLUSION: 
Selective  blockade of the right stellate ganglion at C6 level is a safe and  minimally invasive procedure that may provide durable relief from PTSD  symptoms, allowing the safe discontinuation of psychiatric medications.
http://www.ncbi.nlm.nih.gov/pubmed/20412504