As mentioned above, cannabis and hemp differ in the levels of naturally occurring THC that they contain. THC is a cannabinoid like CBD. However, its properties are very different and often antagonistic to the effects of CBD. Hemp is naturally high in CBD and low in THC; the reverse is true of cannabis. In fact, hemp contains only about 0.3% – 1.5% THC, while cannabis contains about 5% – 10% or more THC.
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.