Dating chronic pot smoker
The earliest known reports regarding the sacred status of cannabis in India and Nepal come from the Atharva Veda estimated to have been written sometime around 2000–1400 BCE.Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs.sudden cardiac death, and cardiomyopathy have been reported to be temporally associated with cannabis use.Research in these events is complicated because cannabis is often used in conjunction with tobacco, and drugs such as alcohol and cocaine.
Both reviews noted that some of the studies that they examined had methodological limitations, for example small sample sizes or not distinguishing adequately between cannabis and alcohol consumption.
A 2012 meta-analysis found that the effects of cannabis use on neurocognitive functions were "limited to the first 25 days of abstinence" and that there was no evidence that such use had long-lasting effects, Compared to non-smokers, people who smoked cannabis regularly in adolescence exhibit reduced connectivity in specific brain regions associated with memory, learning, alertness, and executive function.
A study has suggested that sustained heavy, daily, adolescent onset cannabis use over decades is associated with a decline in IQ by age 38.
Most of the illicit drug emergency room visits involved multiple drugs.
Heavy, long term exposure to marijuana may have biologically-based physical, mental, behavioral and social health consequences and may be "associated with diseases of the liver (particularly with co-existing hepatitis C), lungs, heart, and vasculature".- in India and Nepal since the Vedic period dating back to approximately 1500 BCE, but perhaps as far back as 2000 BCE.