Sunday, March 25, 2018
"Unique treatment potential of cannabidiol for the prevention of relapse to drug use: preclinical proof of principle"
The title of this post is the title of this notable new research just published on-line from the journal Neuropsychopharmacology. Here is the abstract:
Cannabidiol (CBD), the major non-psychoactive constituent of Cannabis sativa, has received attention for therapeutic potential in treating neurologic and psychiatric disorders. Recently, CBD has also been explored for potential in treating drug addiction. Substance use disorders are chronically relapsing conditions and relapse risk persists for multiple reasons including craving induced by drug contexts, susceptibility to stress, elevated anxiety, and impaired impulse control. Here, we evaluated the “anti-relapse” potential of a transdermal CBD preparation in animal models of drug seeking, anxiety and impulsivity. Rats with alcohol or cocaine self-administration histories received transdermal CBD at 24 h intervals for 7 days and were tested for context and stress-induced reinstatement, as well as experimental anxiety on the elevated plus maze.
Effects on impulsive behavior were established using a delay-discounting task following recovery from a 7-day dependence-inducing alcohol intoxication regimen. CBD attenuated context-induced and stress-induced drug seeking without tolerance, sedative effects, or interference with normal motivated behavior. Following treatment termination, reinstatement remained attenuated up to ≈5 months although plasma and brain CBD levels remained detectable only for 3 days. CBD also reduced experimental anxiety and prevented the development of high impulsivity in rats with an alcohol dependence history. The results provide proof of principle supporting potential of CBD in relapse prevention along two dimensions CBD: beneficial actions across several vulnerability states, and long-lasting effects with only brief treatment. The findings also inform the ongoing medical marijuana debate concerning medical benefits of non-psychoactive cannabinoids and their promise for development and use as therapeutics.
I found this research via this press article with a headline that provides a crisp accounting of what this research means: "Cannabis drug may help alcohol and cocaine addicts overcome their cravings, study finds." Here is how one of the researchers explained the findings in the press account:
Speaking of the findings, lead author Dr Friedbert Weiss said: 'The efficacy of the CBD to reduce reinstatement in rats with both alcohol and cocaine -- and, as previously reported, heroin -- histories predicts therapeutic potential for addiction treatment across several classes of abused drugs.
'The results provide proof of principle supporting the potential of CBD in relapse prevention along two dimensions: beneficial actions across several vulnerability states and long-lasting effects with only brief treatment.
'Drug addicts enter relapse vulnerability states for multiple reasons. Therefore, effects such as these observed with CBD that concurrently ameliorate several of these are likely to be more effective in preventing relapse than treatments targeting only a single state.'
Results further suggest CBD is completely cleared from such rats' brains just three days after the treatment ends.