Cannabinoids are a group of chemicals, which interact with cannabinoid receptors present principally in the brain.

– Natural cannabinoids are obtained from the infloroscences of the plant Cannabis sativa.

$\Rightarrow$ Flower tops, leaves and resin of cannabis plant are used in various combinations to produce marijuana, hashish, charas and ganja.

The main active element is $Delta$-$9$ Tetrahydrocannabinol($THC$). It causes pupil dilation, high level of sugar in blood, higher urine formation.

Generally taken by inhalation and oral ingestion, these are known for their effects on cardiovascular system.

Cannabinoids are also used by some sport persons for increased athletic performance.