This sounds promising...note the importance of cholesterol.

http://www.sciencedaily.com/releases...0625101449.htm

Using femtosecond lasers to administer drugs
Date:
June 25, 2014
Source:
Okinawa Institute of Science and Technology - OIST

Summary:
Scientists are using lasers, nanotechnology and neuroscience to develop a new, versatile drug delivery system. The system uses a laser to release a neurochemical that is dysfunctional in Parkinson’s Disease in a controlled and repeatable manner.