This month, researchers from the University of Colorado Skaggs School Of Pharmacy and Pharmaceutical Sciences published new information about the link between cannabis use and migraines that many sufferers of the painful headaches have anecdotally known for years.

Rather than a clinical trial, their early research looked retroactively at the medical charts of 121 patients whose primary diagnosis was migraine headaches. The scientists wanted to determine if the number of migraines was reduced among cannabis users.

The study showed using cannabis decreased the number of migraine headaches in patients from from an average of 10.4 headaches per month to just 4.6 headaches per month.

Almost 12% of those studied reported their migraines stopped completely once they started consuming cannabis, and around 40% of the patients said they felt cannabis use decreased the number of migraines they experienced.

Some patients in the study did report negative side effects, the most common being drowsiness.

These results provide hope for migraine sufferers, especially those suffering from chronic migraines. The study calls for more research to be done in order that the effects of dosage levels, strains, and ingestion methods of consuming cannabis can be better understood.