Irradiated Cannabis

Irradiated cannabis is medical cannabis that has been sterilised using an irradiation process. This treatment helps reduce levels of microbes such as mould or bacteria, ensuring the product meets strict quality and safety standards for patients. Not all cannabis will need to be irradiated if it naturally complies with the relevant standards for safety prior to any decontamination method.

Yes. Irradiation is widely considered a safe way to sterilise medical cannabis. The process most often uses gamma radiation, which does not remain in the product after treatment. Irradiation is used to help reduce microbial contamination, supporting product safety for patients — especially where immune systems may be more vulnerable.

No. There is no evidence to suggest that non-irradiated cannabis is more effective for medical use. Current research indicates that the irradiation process does not reduce the quantities of cannabinoids in medial cannabis flower. There is conflicting evidence on the effects of irradiation on terpenes. Some studies have shown irradiation increases terpene levels, whilst others have shown it can decrease. This is likely influenced by the chemical composition of the plant itself, its water content and type of irradiation process used. Eligible patients can discuss their suitability for different types of medical cannabis flower with their clinician during a appointment to find the right option for their needs.