E.C.H.M. Haijen

Totomanova, I., Haijen, E. C. H. M., Hurks, P. P. M., Ramaekers, J. G., & Kuypers, K. P. C. (2025). Potential therapeutic effects of psychedelics in small doses: Is there a role for microdosing in psychiatry? International Review of Neurobiology. Advance online publication. https://doi.org/10.1016/bs.irn.2025.03.002

Mueller, L., de Jesus, J. S., Schmid, Y., Mueller, F., Becker, A., Klaiber, A., Straumann, I., Luethi, D., Haijen, E. C. H. M., Hurks, P. P. M., Kuypers, K. P. C., & Liechti, M. E. (2025). Safety and Efficacy of Repeated Low-Dose LSD for ADHD Treatment in Adults: A Randomized Clinical Trial. JAMA Psychiatry. https://doi.org/10.1001/jamapsychiatry.2025.0044

Haijen, E. C. H. M., Hurks, P. P. M., & Kuypers, K. P. C. (2024). Self-rated costs and benefits of conventional and alternative adult ADHD treatments. Scientific Reports, 14(1), Article 28046. https://doi.org/10.1038/s41598-024-79025-7

Angyus, M., Osborn, S., Haijen, E., Erritzoe, D., Peill, J., Lyons, T., Kettner, H., & Carhart-Harris, R. (2024). Validation of the imperial psychedelic predictor scale. Psychological Medicine, 1-9. Advance online publication. https://doi.org/10.1017/S0033291724002204

Haijen, E. C. H. M., Hurks, P. P. M., & Kuypers, K. P. C. (2024). Effects of Psychedelic Microdosing versus Conventional ADHD Medication Use on Emotion Regulation, Empathy, and ADHD Symptoms in Adults with severe ADHD symptoms: A Naturalistic Prospective Comparison Study. European Psychiatry, 67(1), Article e18. https://doi.org/10.1192/j.eurpsy.2024.8

Haijen, E. C. H. M., Hurks, P. P. M., & Kuypers, K. P. C. (2023). Trait mindfulness and personality characteristics in a microdosing ADHD sample: a naturalistic prospective survey study. Frontiers in Psychiatry, 14, Article 1233585. https://doi.org/10.3389/fpsyt.2023.1233585

Haijen, E. C. H. M., Hurks, P. P. M., & Kuypers, K. P. C. (2022). Microdosing with psychedelics to self-medicate for ADHD symptoms in adults: A prospective naturalistic study. Neuroscience Applied, 1, Article 101012. https://doi.org/10.1016/j.nsa.2022.101012

Haijen, E., Farre, M., de la Torre, R., Pastor, A. M., Olesti, E., Pizarro, N., Ramaekers, J. G., & Kuypers, K. P. C. (2018). Peripheral endocannabinoid concentrations are not associated with verbal memory impairment during MDMA intoxication. Psychopharmacology, 235(3), 709-717. https://doi.org/10.1007/s00213-017-4787-2