Eef Theunissen

Assistant professor

University of Maastricht

Netherlands

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Dr. Eef Theunissen is an Assistant Professor at Maastricht University, Netherlands. His research focuses on the pharmacological effects of various substances, including opioids, cannabinoids, and novel psychoactive compounds, as well as their impact on cognitive functioning. Recent studies include assessments of safety profiles, neurocognitive functions, and acute effects of substances like mitragynine, 2C-B, and vaporized 5-methoxy-N,N-dimethyltryptamine.

Articles (10)

Year:

2025

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2025

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2025

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2025

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2024

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2023

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2023

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2023

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2022

Year:

2022

Collaborators (7)

Kim Kuypers

Associate Professor

University of Maastricht

NETHERLANDS

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Matthias E. Liechti

Professor

University of Basel

SWITZERLAND

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Johannes G. Ramaekers

NETHERLANDS

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Ornella Corazza

UNITED KINGDOM

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jan schepers

University of Maastricht

NETHERLANDS

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Honor Doro Townshend

Lecturer in Criminology

Arden University

UNITED KINGDOM

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Thomas Arkell

Swinburne University of Technology

AUSTRALIA

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Eef Theunissen

Research Interests

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About

Articles (10)

Use patterns of classic, novel, and herbal opioids

Recreational Nitrous Oxide Dosing and Administration and Its Use in Traffic

An exploratory study of the safety profile and neurocognitive function after single doses of mitragynine in humans

Safety and cognitive pharmacodynamics following dose escalations with 3-methylmethcathinone (3-MMC)

Inter-individual variability in neural response to low doses of LSD

A Preliminary Inventory of Kratom (Mitragyna Speciosa) Products and Vendors on the Darknet and Cryptomarkets

Assessment of the Acute Effects of 2C‐B vs. Psilocybin on Subjective Experience, Mood, and Cognition

A phase 1/2 trial to assess safety and efficacy of a vaporized 5-methoxy-N,N-dimethyltryptamine formulation (GH001) in patients with treatment-resistant depression

Cannabis containing equivalent concentrations of delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) induces less state anxiety than THC-dominant cannabis

A Comparison of Acute Neurocognitive and Psychotomimetic Effects of a Synthetic Cannabinoid and Natural Cannabis at Psychotropic Dose Equivalence

Collaborators (7)

Kim Kuypers

Matthias E. Liechti

Johannes G. Ramaekers

Ornella Corazza

jan schepers

Honor Doro Townshend

Thomas Arkell

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