The effects of synthetic cannabinoid UR-144 on the human body-A review of 39 cases

•Effects observed after UR-144 use are presented.•Blood concentrations of UR-144 are showed.•Study can assist in the recognition of possible effects caused by UR-144.

UR-144 [(1-pentyl-1H-indol-3-yl)(2,2,3,3-tetramethylcyclopropyl)methanone] is a synthetic cannabinoid, which has been detected in many 'legal highs', seized from the global drug market since the beginning of 2012. It has gained popularity as a 'legal' alternative to classic cannabis in countries where it was not controlled. Despite the widespread distribution of this substance, the data on its effects on the human body are scarce. Therefore, this paper describes the results of analysis and observed effects in 39 cases in which UR-144 was determined in blood.Symptoms were noted from the blood sampling forms filled out by the representative doctor. The determined concentrations of UR-144 were in the range of trace amounts (LOD-0.15 ng/mL; LOQ-0.5 ng/mL) up to 17 ng/mL. The most common observed effects included slurred speech, dilated pupils, sluggish and abnormal pupillary reaction, cheerful behaviour, poor coordination, and staggering. Less frequently observed were: verbosity, narrow pupils, loss of consciousness, pale or reddened facial skin, blackout, euphoria, agitation, hallucinations, hindered communication, shaking hands, seizures, convulsions, somnolence, delayed movements, redness of the conjunctiva, and tachycardia.The discussed cases show the effects observed after UR-144 use. This study can assist in the recognition of possible effects caused by this substance.