“No clinical trials are currently available that demonstrate the effects of marijuana on patients with migraine headache; however, the potential effects of cannabinoids on serotonin in the central nervous system indicate that marijuana may be a therapeutic alternative.

Thus, the objective of this study was to describe the effects of medical marijuana on the monthly frequency of migraine headache.

The frequency of migraine headache was decreased with medical marijuana use.

Prospective studies should be conducted to explore a cause-and-effect relationship and the use of different strains, formulations, and doses of marijuana to better understand the effects of medical marijuana on migraine headache treatment and prophylaxis.”

http://www.ncbi.nlm.nih.gov/pubmed/26749285

http://www.thctotalhealthcare.com/category/headachemigraine/