The study, published in the journal Pharmacotherapy, examined patients diagnosed with migraines and treated with medical marijuana between Jan. 2010 and Sept. 2014. It found the frequency of migraines dropped from 10.4 to 4.6 headaches per month, a number considered statistically and clinically significant.
Of the 121 patients studied, 103 reported a decrease in monthly migraines while 15 reported the same number and three saw an increase in migraines.
"There was a substantial improvement for patients in their ability to function and feel better," said the study's senior author Professor Laura Borgelt, PharmD, FCCP, BCPS. "Like any drug, marijuana has potential benefits and potential risks. It's important for people to be aware that using medical marijuana can also have adverse effects."