“A randomized, double-blinded, placebo controlled crossover study was conducted in 16 patients with painful diabetic peripheral neuropathy to assess the short-term efficacy and tolerability of inhaled cannabis.

In a cross-over design, each participant was exposed to a single dosing session of placebo, low (1% tetrahydrocannabinol, THC), medium (4% THC), or high (7% THC) doses of cannabis…

This small, short-term, placebo-controlled trial of inhaled cannabis demonstrated a dose dependent reduction in diabetic peripheral neuropathy pain in patients with treatment-refractory pain.

This adds preliminary evidence to support further research on the efficacy of the cannabinoids in neuropathic pain.”

http://www.ncbi.nlm.nih.gov/pubmed/25843054

http://www.thctotalhealthcare.com/category/neuropathic-pain/