No benefits observed and adverse effects noted in some patients.
Link: Are oral cannabinoids safe and effective in refractory neuropathic pain?
Year: 2004
DOI: 10.1016/S1090-3801(03)00084-3
No shown efficacy of cannabis for treatment of Pain (Neuropathies, in general) according to the results found in this study.
Oral THC at an average dose of 16.6 mg