Ragnar Thomsen

September 11, 2025

Long-Lasting Cognitive and Physical Impairment After Recreational Use of the Semisynthetic Cannabinoid Hexahydrocannabinonyl (HHC-C9): A Case Report

Abstract Background and Clinical Significance: The recreational use of semisynthetic cannabinoids (SSCs) is increasing, and SSCs account for more than…

January 13, 2025

Prolonged sedation and unconsciousness after intoxication with the novel semisynthetic cannabinoid hexahydrocannabioctyl (HHC-C8): Two case descriptions

Abstract Semisynthetic cannabinoids (SSCs) are compounds closely related to the major phytocannabinoids. SSCs have recently appeared as legal alternatives to…

November 23, 2023

Evidence of 11-Hydroxy-hexahydrocannabinol and 11-Nor-9-carboxy-hexahydrocannabinol as Novel Human Metabolites of Δ9-Tetrahydrocannabinol

Abstract (−)-trans-Δ9-tetrahydrocannabinol (Δ9-THC) is the primary psychoactive compound in the Cannabis sativa plant. Δ9-THC undergoes extensive metabolism, with the main…