^ Devinsky, Orrin; Cilio, Maria Roberta; Cross, Helen; Fernandez-Ruiz, Javier; French, Jacqueline; Hill, Charlotte; Katz, Russell; Di Marzo, Vincenzo; Jutras-Aswad, Didier; Notcutt, William George; Martinez-Orgado, Jose; Robson, Philip J.; Rohrback, Brian G.; Thiele, Elizabeth; Whalley, Benjamin; Friedman, Daniel (22 May 2014). "Cannabidiol: Pharmacology and potential therapeutic role in epilepsy and other neuropsychiatric disorders". Epilepsia. 55 (6): 791–802. doi:10.1111/epi.12631. PMC 4707667. PMID 24854329.
Due to its wide variety of medical benefits, CBD is used to treat a number of common conditions, including chronic pain, inflammation, seizures, insomnia, spasms, multiple sclerosis, and mental disorders such as anxiety and depression. As a topical agent, CBD oil can be directly applied to certain areas of the body as an effective means of relieving pain and soreness, reducing inflammation, and soothing inflammatory skin conditions such as psoriasis, dermatitis, and eczema.
A CNN program that featured Charlotte's Web cannabis in 2013 brought increased attention to the use of CBD in the treatment of seizure disorders. Since then, 16 states have passed laws to allow the use of CBD products with a doctor's recommendation (instead of a prescription) for treatment of certain medical conditions. This is in addition to the 30 states that have passed comprehensive medical cannabis laws, which allow for the use of cannabis products with no restrictions on THC content. Of these 30 states, eight have legalized the use and sale of cannabis products without requirement for a doctor's recommendation.
However, cannabidiol as an anxiety reducer has almost none of these issues. One study had 24 participants who took either 600 mg of CBD or a placebo drug. In a speaking test that followed, the group which underwent CBD treatment showed less anxiety. They also had a smaller degree of cognitive impairment and felt less discomfort overall as they spoke. In other words, their results were better than those of the placebo group.
Cannabidiol is currently a class B1 controlled drug in New Zealand under the Misuse of Drugs Act. It is also a prescription medicine under the Medicines Act. In 2017 the rules were changed so that anyone wanting to use it could go to the Health Ministry for approval. Prior to this, the only way to obtain a prescription was to seek the personal approval of the Minister of Health.