Cannabis pain relief for cancer patient 'without the high'
8 November 2012 Last updated at 12:59 GMT
A company in Israel has developed a new kind of cannabis without the chemical that gets users high.
Researchers say it has enhanced medical benefits, particularly as an anti-inflammatory. It has been used successfully in trials on patients and is particularly effective with sick elderly people and children.
The BBC was given special permission to go to a secret Israeli site where cannabis is grown.
The BBC's Yolande Knell spoke to Ruth Gallily, immunology professor at Hebrew University, and cancer patient David Sarbach.