Pennsylvania legalized marijuana for limited medical purposes in August of 2016 and dispensaries are now operating. Although the law has been passed, there is still much work to be done in order to implement the program and to ensure that medical marijuana usage is legal and safe. One area in which there is a still a question about the legality of medical marijuana is Pennsylvania DUI law. Currently, marijuana is classified as a schedule I drug which means that it has been determined to have no legitimate medical usage. Obviously that is no longer an appropriate classification based on the current law. However, the outdated classification continues to leave Pennsylvania DUI law in limbo.