Some cookies are essential to the running of the website, while others (analytics) help us to make improvements. We also incorporate functionality from other websites, such as video, social media feeds and Browsealoud (text-to-speech and translations services) which may set cookies. More on how we use cookies
This website uses text-to-speech software called Browsealoud to read and / or translate its content . To use Browsealoud, you must allow Browsealoud cookies; the Browsealoud icon will then appear at the bottom right of your screen.
You can find out more about how Browsealoud uses cookies or change your cookie preferences at any time by going to our cookies page.
Allow Browsealoud cookies Do not use Browsealoud
If you have a new continuous cough, a high temperature, or a loss or change to your sense of taste or smell, do not come to our hospitals. Follow the national advice on coronavirus (COVID-19).
Please find information on our services and visiting restrictions in our COVID-19 section.
Patients and visitors must wear a face covering in our hospitals.
This site is best viewed with a modern browser. You appear to be using an old version of Internet Explorer.
Also known as: Cannabis, THC
Sample type: Urine (Universal)
Collection requirements: No special requirements
Price on application
Please see Turnaround times
Immunoassay
John Radcliffe Hospital
Cut off concentrations for positive results are taken from EWDTS guidance