More than 400 active compounds have been isolated from the C sativa plant. Sixty active compounds are unique to the plant and are collectively known as cannabinoids. Delta-9-tetrahydrocannanbinol (THC) is the most psychoactive cannabinoid, producing euphoria, relaxation, intensification of ordinary sensory experiences, perceptual alterations, diminished pain, and difficulties with memory and concentration.
==Special Precautions of Cannabinoids==
* Acute cannabis toxicity results in difficulty with coordination, decreased muscle strength, decreased hand steadiness, postural hypotension, lethargy, decreased concentration, slowed reaction time, slurred speech, and conjunctival injection. * Large doses of THC may produce confusion, amnesia, delusions, hallucinations, anxiety, and agitation, but most episodes remit rapidly. Long-term users may experience paranoia, panic disorder, fear, or dysphoria. * There is little evidence on the extent of risk for adverse cardiovascular outcomes among cannabis users with pre-existing conditions.* See also : [[Cannabis Sativa]]
==Health benefits and uses of Cannabinoids==
Cannabis preparations have been used to relieve nausea, improve appetite and reduce pain for thousands of years. The development of synthetic drugs in the 20th century supplanted these and other herbal remedies, but in the past several decades there has been a resurgence of interest in using cannabis and cannabinoid preparations for medical purposes.