Researchers identified 'statistically significant' improvements in symptoms, quality of life and a reduction in opioid use.
Researchers found no evidence of an increase in 'high risk' use in Canada.
Black and African American cancer patients were less likely to get certified for medical cannabis.
Prescribed cannabis was associated with an improvement in symptoms, quality of life and a reduction in opioid use.
The study aims to recruit more than 230 glioblastoma patients at 14 NHS hospitals across the UK.
Researchers say their findings contrast with data suggesting cannabis use increases the risk of developing psychotic disorder.
New research adds to the evidence base for the use of cannabis in chronic pain, Tourette's, Parkinson's, PTSD and lung cancer.
It is thought to be the world's first trial of its kind into medicinal cannabis and endometriosis.
Patients saw improvements in symptoms and quality of life with cannabis, but less than half spoke to their doctor about it.
Studies show Parkinson’s patients have found relief for a number of physical and psychological symptoms
