USA- According to a newspaper report the amount of people registered to legally use cannabis for medicinal purposes in Colorado has nearly tripled in the last year to just above 11,000. That number is expected to grow to 15,000 by year’s end. (Source: Aspen Daily News)

Science: Diabetic neuropathy

UNITED KINGDOM – According to clinical research at the Royal Hallamshire Hospital in Sheffield, UK, a standardized cannabis extract (Sativex) did not reduce pain in 30 patients with diabetic neuropathy. In this controlled trial participants received daily Sativex or placebo. There were no significant differences in pain relief and other outcome measures. (Source: Selvarajah D, et al. Diabetes Care. [Electronic publication ahead of print]

Science: Neuropathic pain

ITALY – According to animal research at the University of Naples, Italy, a selective CB2 receptor agonist reduced neuropathic pain after nerve injury. The treatment with the cannabinoid reduced inflammation. (Source: Luongo L, et al. Neurobiol Dis. [Electronic publication ahead of print])

Science: Detection of cannabis use

USA – According to research at the National Institute on Drug Abuse in Baltimore, USA, THC may be detectable for more than 6 days after last cannabis use in blood of regular users of cannabis. Of 25 participants nine chronic users (36 per cent) had no measurable THC during 7 days of cannabis abstinence; 16 had at least one positive THC of more than 0.25 ng/ml, but not necessarily on the first day. On day 7, 6 full days after controlled cannabis abstinence, six participants still displayed detectable THC concentrations and all 25 had measurable concentrations of THC-COOH. The highest observed THC concentrations at start of the study (day 1) and day 7 were 7.0 and 3.0 ng/ml, respectively. (Source: Karschner EL, et al. Addiction . [Electronic publication ahead of print])

Science: Cannabis and alcohol use

USA – According to a study at the Yale University School of Medicine in New Haven, USA, with 28 daily cannabis users those with past alcohol abuse or dependence increased their alcohol use during a period of cannabis abstinence. Participants were subjected to a 13-day cannabis abstinence period and those with past problematic alcohol use increased alcohol use by 52 per cent. (Source: Peters EN, et al. Drug Alcohol Depend. [Electronic publication ahead of print])

Science: Heritability of cannabis use

HOLLAND – According to a study at the University of Amsterdam with 3115 twins there was a moderate genetic influence (44 per cent) on initiation of cannabis use. The remaining causes were explained by environmental influences shared by twins (31 per cent) and by environmental factors experienced only by the person investigated (24 per cent). (Source: Vink JM, et al. Addict Behav. [Electronic publication ahead of print])

Science: Anxiety

AUSTRALIA – According to a study at the Schizophrenia Research Institute in Darlinghurst, Australia, chronic but not acute administration of the plant cannabinoid cannabidiol (CBD) caused anxiolytic and antipsychotic effects in mice. (Source: Long LE, et al. Int J Neuropsychopharmacol. [Electronic publication ahead of print])


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