Cannabidiol (CBD) is substance present in Cannabis and is an antagonist of THC. Recently studies demonstrated various effects mainly due to cannabinoids (mainly THC and CBD) which are contained in different proportions depending on the varieties, but also terpenes. The cannabinoid which recently interests the medical environment is the cannabidiol (CBD). Indeed, until recently the interest in Cannabis mainly concerned THC, or 9-tetrahydrocannabinol, and the majority of the existing varieties of Cannabis contained a lot of THC and little CBD. People did look for the 'stoned' effect and 'got high' with THC. More about CBD on Wikipedia, in the articles of Cannaliz Switzerland Blog as well as a few articles just below.
a list of CBD / Hemp / Cannabis / THC related articles
Synthetic vs. Whole Plant CBD
Published in the journal Pharmacology & Pharmacy (Feb. 2015), the article directly challenges one of the sacred cows of Big Pharma and the medical-industrial complex -- the notion that “crude” botanical preparations are inherently low grade and less effective than pure, single-molecule compounds. - https://www.projectcbd.org/article/synthetic-vs-whole-plant-cbd
CBD & THC ratio ?
Understanding the cannabinoids Synergies between CBD:THC. High therapeutic potential use: anti-psychotic, relaxing, used in epilepsy treatments - http://www.alpha-cat.org/resources/understand-and-interpret-the-cbd-thc-ratios/
What's CBD-rich cannabis good for? While a CBD-dominant cannabis remedy with little THC is not intoxicating, it’s not necessarily the most effective treatment option. That’s because CBD and THC can amplify each other’s therapeutic effects. - https://www.cbd.org/archive/patient-guidance-care-by-design
The Entourage Effect
The interaction of various compounds in marijuana is known as the ‘entourage effect. - http://www.leafscience.com/2014/09/11/medical-marijuana-entourage-effect/