Short- and Long-Term Effects of Cannabis on Headache and Migraine Carrie Cuttler, Alexander Spradlin, Michael J. Cleveland, and Rebecca M. Craft Journal of Pain, 2019. doi : 10.1016/j.jpain.2019.11.001   Highlights  Headache and migraine ratings were reduced by nearly 50% after using cannabis  Men reported larger reductions in headache after cannabis use than women  Cannabis concentrates were related to larger reductions in headache than flower  Evidence for tolerance to effects of cannabis on headache and migraine was detected  Evidence for medication overuse headache was not detected   Abstract Use of cannabis to alleviate headache and migraine is relatively common, yet research on its effectiveness remains sparse. We sought to [...]