"Like any drug, marijuana has potential benefits and potential risks. It is important for people to be aware that using medical marijuana can also have adverse effects," Borgelt cautioned. Borgelt said cannabinoid receptors can be found throughout the body, including the brain, connective tissues and immune system. And they appear to have anti-inflammatory and pain-relieving properties. Cannabinoids are a group of active compounds found in marijuana.

These cannabinoids also seem to affect critical neurotransmitters like serotonin and dopamine. "We believe serotonin plays a role in migraine headaches, but we are still working to discover the exact role of cannabinoids in this condition," Borgelt said. The study is one of the first to reveal a drop in migraine frequency due to medical marijuana. Borgelt said the results were quite remarkable but stressed the need for more controlled…