As psychotropic drugs are a powerful method of altering cognitive function, many advocates of cognitive liberty are also advocates of drug law reform; claiming that the "war on drugs" is in fact a "war on mental states". The CCLE, as well as other cognitive liberty advocacy groups such as Cognitive Liberty UK, have lobbied for the re-examination and reform of prohibited drug law; one of the CCLE's key guiding principles is that: "governments should not criminally prohibit cognitive enhancement or the experience of any mental state". Calls for reform of restrictions on the use of prescription cognitive-enhancement drugs (also called smart drugs or nootropics) such as Prozac, Ritalin and Adderall have also been made on the grounds of cognitive liberty.