This article is shared with permission from our friends at Medical News Today.
Synthetic cannabinoids (SCBs) are a type of psychotropic chemical increasingly marketed as a safe and legal alternative to marijuana.
They are either sprayed onto dried plants so that they can be smoked, or they are sold as vaporizable and inhalable liquids. A new review from the University of Arkansas for Medical Sciences (UAMS) warns against the dangerous side effects of the compounds popularly (and misleadingly) referred to as “synthetic marijuana.”
Referring to the SCBs currently sold as “K2” and “Spice,” Paul L. Prather, a cellular and molecular pharmacologist at UAMS and corresponding author of the review, explains the motivation behind it:
“In the United States, in 2007 or so, we started seeing all kinds of people coming into emergency rooms saying they smoked marijuana, but they had these really bizarre symptoms that did not correspond with the effects you see with marijuana.”
The report, therefore, set out to give an overview of the existing literature on SCBs, and to show that not only are they different from marijuana, but also that they do not constitute an appropriate substitute for cannabis. On the contrary, SCBs are drugs in their own right, with many toxic – and sometimes even fatal – effects.
The review has been published in the journal Trends in Pharmacological Sciences.
SCBs are Different From Marijuana
A new review warns that so-called synthetic marijuana is actually very different from cannabis and is potentially unsafe.
SBCs are known to create psychotropic effects in much the same way as marijuana – by activating the CB1 cannabinoid receptor, which is found primarily in the brain and the central nervous system. Additionally, in the case of marijuana, its main active ingredient is tetrahydrocannabinol (THC), which also activates the CB2 receptor (found mainly in the immune system).
However, as the authors warn, SCBs activate the CB1 receptor to a much higher intensity than THC does.
William E. Fantegrossi, a behavioral pharmacologist at UAMS and co-author of the review, notes that SCBs “are highly efficacious drugs; they tend to activate the CB1 receptor to a greater degree than we can ever get to with THC from marijuana.”
Additionally, the authors caution that because SCBs are chemically different from THC, they may activate other receptors aside from CB1. These cellular receptors, so far unknown, may be causing the negative health effects noticed in SCB users.
SCBs Linked to Serious Adverse Health Effects and Even Death
As reported in the review, some of these effects suggest that SCBs cause much more toxicity than marijuana. Toxicity has been reported across a wide range of systems, including the gastrointestinal, neurological, cardiovascular, and renal systems.
The clinical cases documented in the review include acute and long-term symptoms, such as:
- Kidney injury
- Chest pain
- Myocardial toxicity
- Ischemic stroke
Common adverse effects include prolonged and severe vomiting, anxiety, panic attacks, and irritability. Additionally, SCBs reportedly caused extreme psychosis in susceptible individuals, whereas marijuana only causes mild psychosis in those predisposed.
Furthermore, 20 deaths have been linked to SCBs between 2011 and 2014, whereas no deaths were reported among marijuana users during that time.
Finally, SCBs are likely to result in tolerance, dependence, and withdrawal.
SCBs are Not Safe, Authors Warn
Because SCBs cannot be detected by standard drug screening, they are particularly popular among users who want to avoid detection, such as teenagers and army personnel. These users often purchase the drugs online, but as Prather and colleagues warn, customers often do not know what they are purchasing because they get something different each time.
“Not only does the amount of the active pharmacological agent change with different batches of drugs, made by different labs, but the active compound itself can change,” says Fantegrossi. Prather adds that “there are usually a minimum of three, if not five, different synthetic cannabinoids in a single product.”
However, the potential therapeutic benefits of cannabinoids should not be dismissed entirely, write the authors. As with opioids in general, misuse or abuse can have severely adverse or even fatal consequences, but proper use may offer significant benefits.
Overall, though, SCBs should be viewed with suspicion and treated with caution.
“The public sees anything with the marijuana label as potentially safe, but these synthetic compounds are not marijuana […] You never know what they are, and they are not safe.”
Paul L. Prather
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