Disclosed are invasive and non-invasive central nervous system (CNS) drug delivery methods and devices for use in these methods that essentially circumvent the blood-brain barrier. More specifically, the disclosed methods and devices utilize iontophoresis as delivery technique that allows for enhanced...http://www.google.co.uk/patents/US7033598?utm_source=gb-gplus-sharePatent US7033598 - Methods and apparatus for enhanced and controlled delivery of a biologically active agent into the central nervous system of a mammal