It is difficult to find a place or time when drugs in some form or another were not in common use in society. In addition, throughout the history of drug use different drugs have been defined as either good or bad with perceptions of drugs changing over the centuries. This chapter focuses on the drug cannabis. Cannabis is described, as well as the uses of cannabis as both a medicine and recreational drug. It addresses the events leading to its prohibition. Cannabis is reviewed as to why the British Home Secretary is considering its reclassification from a Class B to a Class C drug. The chapter concludes with a discussion on the future implications of relaxation of the law in relation to the drug in terms of decriminalization or even eventual legalization. References