Globally, latest research report will increase in Δ-9-tetrahydrocannabinol (THC) focus in seized samples of cannabis for human consumption. That is necessary, as a result of use of cannabis with a excessive focus of THC has been linked to a variety of opposed well being outcomes. The target of this examine was to evaluate latest modifications within the composition of seized cannabis resin in Denmark by (a) inspecting THC focus in samples from Danish forensic laboratories from 2000 to 2017 (N = 430) and (b) inspecting cannabidiol (CBD) focus and the THC:CBD focus ratio in samples from the forensic laboratory in Western Denmark from 2008 to 2017 (N = 147). Hashish resin samples had been analyzed utilizing a gasoline chromatographic evaluation with flame ionization detection quantifying the entire THC and CBD focus. Outcomes confirmed that the THC focus elevated 3-fold from 2000 (imply: 8.3%) to 2017 (imply: 25.3%). Vital will increase occurred in all areas of Denmark. After 2011, we discovered a dramatic enhance in cannabis resin samples with excessive THC focus and the close to disappearance of cannabis resin samples with medium- and low THC focus. Moreover, the THC:CBD focus ratio elevated considerably from 1.Four in 2008 to 4.Four in 2017. Whereas THC focus elevated, CBD focus remained steady at ∼6%. In conclusion, the THC focus of cannabis resin, and THC:CBD focus ratio, have elevated dramatically in Denmark, doubtlessly resulting in increased danger of hurt to customers. Policymakers, remedy professionals, and educators ought to pay attention to this transformation. (PsycINFO Database Report (c) 2019 APA, all rights reserved).