Here is what I sent. I'm not sure what good it will do, but I saved it for the lawsuit!
Health Canada Medical Marijuana Access
To whom it may concern:
It has recently been reported that Health Canada is proposing to release my personal information, obtained under the MMAR program, to various medical governing bodies. I reluctantly provided that information with the expectation of confidentiality and privacy and with the understanding that it would only be accessed at the request of a Canadian police agency. I am therefore asking that you do not violate my rights by permitting anyone, not authorized by me, to access to my files and I am notifying you of my intent to seek damages should you allow it to happen.