Desc: Prescribed Grass: Directed by Zach Klein. With Dr. Baruch, Hana Daniel, Felix, Avri Gilad. Documentary by Zach Klein on the medicinal use of cannabis in Israel. Beginning with a young leukemia patient hooked up to her chemotherapy in a hospital ward, the film shows the personal stories of people who are helped by cannabis under a license issued to them by the Ministry of Health, and the science from Israels world leading experts in the subject of the cannabis plant, including Professor Rafael Meshulam - known as 'the grandfather of weed research' for the discovery of the active compound THC and the endogenous cannabinoid system in 2000. Filmed over the span of three years the interviews are conducted on location in their homes and places of work with cancer patients and their families, medical doctors and growers, Parkinson's disease and Post Traumatic Stress Disorder ( PTSD ) sufferers and the unforgettable Felix - a former elite rock climber who is now barely able to draw breath and slowly dying of a paralytic illness - amyotrophic lateral sclerosis ( ALS) .