Sys S. Johansen

Copenhagen, Denmark

Last Updated: 09/26/2026

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Found 59 publications

Case Report: Repeated low doses of psilocybin reduce perceived symptom severity but fail to restore cognitive flexibility in a case of severe obsessive-compulsive disorder: an observational case study of identical twins.

Case Report: Repeated low doses of psilocybin reduce perceived symptom severity but fail to restore cognitive flexibility in a case of severe obsessive-compulsive disorder: an observational case study of identical twins.

Journal: Frontiers in psychiatry

Published: February 28, 2026

Segmental Hair Analysis of Diphenhydramine and Cyclizine Following a Single Dose.

Segmental Hair Analysis of Diphenhydramine and Cyclizine Following a Single Dose.

Journal: Drug testing and analysis

Published: December 19, 2025

Toxicological findings in suspected drugging incidents in Denmark from 2022 - 2024.

Toxicological findings in suspected drugging incidents in Denmark from 2022 - 2024.

Journal: Forensic toxicology

Published: October 15, 2025

Single-dose psilocybin therapy for alcohol use disorder: Pharmacokinetics, feasibility, safety and efficacy in an open-label study.

Single-dose psilocybin therapy for alcohol use disorder: Pharmacokinetics, feasibility, safety and efficacy in an open-label study.

Journal: Journal of psychopharmacology (Oxford, England)

Published: February 28, 2025

Automated enzymatic hydrolysis of urine samples for improved systematic toxicological analysis of drug-facilitated sexual assault cases.

Automated enzymatic hydrolysis of urine samples for improved systematic toxicological analysis of drug-facilitated sexual assault cases.

Journal: Drug testing and analysis

Published: November 29, 2023

Exploring Enzymatic Hydrolysis of Urine Samples for Investigation of Drugs Associated with Drug-Facilitated Sexual Assault.

Exploring Enzymatic Hydrolysis of Urine Samples for Investigation of Drugs Associated with Drug-Facilitated Sexual Assault.

Journal: Pharmaceuticals (Basel, Switzerland)

Published: November 23, 2023

Uncovering forensic evidence of drug-facilitated sexual assault: Toxicological findings from Eastern Denmark from 2015-2022.

Uncovering forensic evidence of drug-facilitated sexual assault: Toxicological findings from Eastern Denmark from 2015-2022.

Journal: Legal medicine (Tokyo, Japan)

Published: July 21, 2023

CCH attack frequency reduction after psilocybin correlates with hypothalamic functional connectivity.

CCH attack frequency reduction after psilocybin correlates with hypothalamic functional connectivity.

Journal: Headache

Published: March 27, 2023

Detection of scopolamine in urine and hair in a drug-facilitated sexual assault.

Detection of scopolamine in urine and hair in a drug-facilitated sexual assault.

Journal: Forensic science international

Published: November 17, 2022

Driving under the Influence of Amphetamine: Analytical Evaluation of Illegal or Prescription Drug Intake Using Chiral UHPLC-MS-MS.

Driving under the Influence of Amphetamine: Analytical Evaluation of Illegal or Prescription Drug Intake Using Chiral UHPLC-MS-MS.

Journal: Journal of analytical toxicology

Published: July 10, 2022

Concentrations of citalopram and escitalopram in postmortem hair segments.

Concentrations of citalopram and escitalopram in postmortem hair segments.

Journal: Forensic science international

Published: March 10, 2022

A Systematic Review of Metabolite-to-Drug Ratios of Pharmaceuticals in Hair for Forensic Investigations.

A Systematic Review of Metabolite-to-Drug Ratios of Pharmaceuticals in Hair for Forensic Investigations.

Journal: Metabolites

Published: August 27, 2021

Showing 1-12 of 59

Last Updated: 09/26/2026