Drs Eef Theunissen (E.L.)

Ramaekers, J. G., Reckweg, J. T., Mason, N. L., Kuypers, K. P. C., Toennes, S. W., & Theunissen, E. L. (2025). Low to moderate doses of 3-methylmethcathinone (3-MMC) produce analgesic effects in healthy volunteers: a proof of principle study with a designer drug. Psychopharmacology. Advance online publication. https://doi.org/10.1007/s00213-025-06798-8

Madrid-Gambin, F., Haro, N., Mason, N. L., Mallaroni, P., Theunissen, E. L., Toennes, S. W., Pozo, O. J., & Ramaekers, J. G. (2025). Metabolomic profiling of cannabis use and cannabis intoxication in humans. Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 50(6), 920-927. Article 104433. https://doi.org/10.1038/s41386-025-02082-7

Prevete, E., Theunissen, E. L., Kuypers, K. P. C., Paci, R., Reckweg, J. T., Cavarra, M., Toennes, S. W., Ritscher, S., Bersani, G., Corazza, O., Pasquini, M., & Ramaekers, J. G. (2024). An exploratory study of the safety profile and neurocognitive function after single doses of mitragynine in humans. Psychopharmacology. Advance online publication. https://doi.org/10.1007/s00213-024-06734-2

Ramaekers, J. G., Reckweg, J. T., Mason, N. L., Kuypers, K. P. C., Toennes, S. W., & Theunissen, E. L. (2024). Safety and cognitive pharmacodynamics following dose escalations with 3-methylmethcathinone (3-MMC): a first in human, designer drug study. Neuropsychopharmacology. Advance online publication. https://doi.org/10.1038/s41386-024-02042-7

Prevete, E., Mason, N. L., Kuypers, K. P. C., Theunissen, E. L., Mallaroni, P., Pasquini, M., & Ramaekers, J. G. (2025). Use patterns of classic, novel, and herbal opioids. Emerging Trends in Drugs, Addictions, and Health, 5, Article 100166. Advance online publication. https://doi.org/10.1016/j.etdah.2024.100166

Hutten, N. R. P. W., Quaedflieg, C. W. E. M., Mason, N. L., Theunissen, E. L., Liechti, M. E., Duthaler, U., Kuypers, K. P. C., Bonnelle, V., Feilding, A., & Ramaekers, J. G. (2024). Inter-individual variability in neural response to low doses of LSD. Translational Psychiatry, 14(1), Article 288. https://doi.org/10.1038/s41398-024-03013-8

Vinckenbosch, F. R. J., Jimenez, D. D., Helmerhorst, H., Dahan, A., Aarts, L., Bikker, F., Theunissen, E., & Ramaekers, J. G. (2024). The prevalence, risks, and detection of driving under the influence of nitrous oxide. Wiley Interdisciplinary Reviews: Forensic Science, 6(2), Article e1508. https://doi.org/10.1002/wfs2.1508

Vinckenbosch, F., Theunissen, E., Stelling, A., Goldenbeld, C., & Ramaekers, J. G. (2024). Recreational Nitrous Oxide Dosing and Administration and Its Use in Traffic: An Online Survey. Journal of Drug Issues. Advance online publication. https://doi.org/10.1177/00220426241233193

Prevete, E., Catalani, V., Singh, D., Kuypers, K. P. C., Theunissen, E. L., Townshend, H. D., Banayoti, H., Ramaekers, J. G., Pasquini, M., & Corazza, O. (2024). A Preliminary Inventory of Kratom (Mitragyna Speciosa) Products and Vendors on the Darknet and Cryptomarkets. Journal of Psychoactive Drugs, 56(4), 485-495. https://doi.org/10.1080/02791072.2023.2242361