Synthetic cannabinoids and potential cardiac arrhythmia risk : an important message for drug users Jules C. Hancox, Nicola J. Kalk and Graeme Henderson Therapeutic Advances in Drug Safety, 2020, 11, 1-4. Doi : 10.1177/2042098620913416   Δ9-Tetrahydrocannabinol, the psychoactive ingredient in cannabis, and synthetic cannabinoid receptor agonists (SCRAs) activate the CB1 receptor to produce their profound behavioural effects and are widely used as recreational drugs. There is growing evidence that SCRAs, commonly known by the street name Spice or K2 (though there are many others, see: http://www.emcdda.europa.eu/publications/drug-profiles/synthetic-cannabinoids) can produce detrimental cardiovascular effects.(1) Commonly observed cardiotoxic effects of SCRAs include tachycardia, chest pain and hypertension.(1) However, bradycardia and [...]