Drug delivery agent technologies and compositions in the form of compounds, dissolvable films, coatings for tablets, powders, edible wafers, capsules, that enable and enhance the delivery of a wide range of active pharmaceutical ingredients to cross the blood-brain barrier into the brain; drug delivery agents and excipients in the form of nanoparticle compounds and microparticle compounds that facilitate the delivery of pharmaceutical and veterinary preparations to the central nerve system (C...