Gel patch may one day deliver MS drugs through the nose into the brain A simplified diagram of the Nose2Brain patch, loaded with biomaterial-based drug particles N2B-patch Project N2B-patch Project Getting traditionally administered drugs into the brain can be challenging, due to the body's protective blood-brain barrier. There may be new hope, however, in the form of a patch that gets shoved up the patient's nose. The blood-brain barrier is generally a good thing, as it helps keep pathogens in the bloodstream from entering the brain. Unfortunately, though, it also limits the effectiv...