Mescaline the skills necessary to handle them safely. Special regulations restricting their availability, possession, storage or use may apply." The peyote cacti and other mescaline-containing plants such as San Pedro are illegal in Western Australia, Queensland, and the Northern Territory, whilst in other states such as Tasmania, Victoria and New South Wales, they are legal for ornamental and gardening purposes. In Canada, France, The Netherlands and Germany, mescaline in raw form and dried mescaline-containing cacti are considered an illegal drug. However, anyone may grow and use peyote, or "Lophophora williamsii", as well as "Echinopsis pachanoi" and "Echinopsis peruviana" without restriction, as
Mescaline deemed too controversial and ultimately omitted from the show, Mayhew praised the experience, calling it "the most interesting thing I ever did". Mescaline has a wide array of suggested medical usage, including treatment of alcoholism and depression. However, its status as a Schedule I controlled substance in the Convention on Psychotropic Substances limits availability of the drug to researchers. Because of this, very few studies concerning mescaline's activity and potential therapeutic effects in humans have been conducted since the early 1970s. Mescaline is biosynthesized from tyrosine or a hydroxylated phenylalanine. In "Lophophora williamsii" (Peyote), dopamine converts into mescaline in a