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Cannabis plants vary widely, with different strains producing dynamic balances of cannabinoids (THC, CBD, etc.) and yielding markedly different effects. Popular strains are often hybrids of C. sativa and C. indica. The medicinal effects of cannabis are widely studied, and are active topics of research both at universities and private research ...
Israel is considered a global leader in medical cannabis research and innovation. [6] [21] [8] Research and innovation in the area is supported by the Ministry of Health [6] and currently being dedicated 8 million shekels a year, [15] making Israel one of three countries in the world where cannabis research is sponsored by the government. [8]
The short-term effects of cannabis are caused by many chemical compounds in the cannabis plant, including 113 [clarification needed] different cannabinoids, such as tetrahydrocannabinol, and 120 terpenes, [1] which allow its drug to have various psychological and physiological effects on the human body.
The endocannabinoid system is a relatively newly discovered neurotransmission system, which influences a variety of functions and systems in the human body. The discovery of the endocannabinoid system and the study of its functions in the body has helped to open a new field in biochemistry and brain research.
[14] [15] Studies of chronic cannabis users have demonstrated, although inconsistently, a long-lasting effect on the attention span, memory function, and cognitive abilities of moderate-dose, long-term users. Once cannabis use is discontinued for several months, these effects disappear, unless the user started consuming during adolescence.
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As of 2021 there is a lack of research into long-term cognitive effects of medical use of cannabis, but one 12-month observational study reported that "MC patients demonstrated significant improvements on measures of executive function and clinical state over the course of 12 months".
The effects last for two to six hours, depending on the amount used. At high doses, mental effects can include anxiety, delusions (including ideas of reference), hallucinations, panic, paranoia, and psychosis. There is a strong relation between cannabis use and the risk of psychosis, though the direction of causality is debated.