Cannabis contains a number of cannabinoids, of which the most abundant are THC (D9-tetrahydrocannabinol), CBD (cannabidiol) and CBN (cannabinol). The active ingredient, which gets you high, is THC. In the plant, CBD is a precursor and CBN a metabolite of THC. As cannabis gets older, THC gradually breaks down to CBN.

THC is the substance found to have most psychoactive effect, and also the most effect on symptoms such as pain or bronchospasm. CBN and CBD are not psychoactive themselves, however CBD can take the edge off a THC high, tending to relax the user rather than increasing anxiety and paranoia. CBD has also been found to have anticonvulsant properties (potential value in treating epilepsy, MS, muscle spasms etc), and recently published research has indicated CBD to be effective in reducing neurotoxic brain damage following strokes or head trauma. The proposed mechanism of action also suggests CBD may offer some protection against ecstasy-derived neurotoxicity (long-term depletion of serotonergic receptors), although this has not specifically been investigated. CBD is normally present in significant quantities in hashish (cannabis resin), although in most herbal cannabis or "skunk" the levels of CBD are usually low or absent.
gs8778 Reviewed by gs8778 on . Mind screwed up after weed!! hello people, i have been growing a few afghan plants for my own personal use and i thought i would harvest a plant early to get bud which was high in THC but low in CBD and see what it was like, so the other night me and two of my mates consumed about about 3grams in that nite and it got us nicely stoned seemed to b almost as good as stuff which we normally buy. the next day i woke up my friens departed and that day i had a real bad headache,and the day after,and the day after!! i thortit Rating: 5