The blood–brain barrier is generally very effective at preventing unwanted substances from accessing the brain, which has a downside. The vast majority of potential drug treatments do not readily cross the barrier, posing a huge impediment to treating mental and neurological disorders. Article Source
Although much more research is required to verify the results of the study, scientists have now shown in mice studies that CBD could have a different use as a ‘Trojan horse’: helping slip medications across the blood-brain barrier.”