Works by Kuypers, Kim P. C.

Results: 47

Safety and Efficacy of Repeated Low-Dose LSD for ADHD Treatment in Adults: A Randomized Clinical Trial.

Published in:

JAMA Psychiatry, 2025, v. 82, n. 6, p. 555, doi. 10.1001/jamapsychiatry.2025.0044

By:

Mueller, Lorenz;
Santos de Jesus, Joyce;
Schmid, Yasmin;
Müller, Felix;
Becker, Anna;
Klaiber, Aaron;
Straumann, Isabelle;
Luethi, Dino;
Haijen, Eline C. H. M.;
Hurks, Petra P. M.;
Kuypers, Kim P. C.;
Liechti, Matthias E.

Publication type:

Article

Adults who microdose psychedelics report health related motivations and lower levels of anxiety and depression compared to non-microdosers.

Published in:

Scientific Reports, 2021, v. 11, n. 1, p. 1, doi. 10.1038/s41598-021-01811-4

By:

Rootman, Joseph M.;
Kryskow, Pamela;
Harvey, Kalin;
Stamets, Paul;
Santos-Brault, Eesmyal;
Kuypers, Kim P. C.;
Polito, Vince;
Bourzat, Francoise;
Walsh, Zach

Publication type:

Article

No Evidence that MDMA-Induced Enhancement of Emotional Empathy Is Related to Peripheral Oxytocin Levels or 5-HT1a Receptor Activation.

Published in:

PLoS ONE, 2014, v. 9, n. 6, p. 1, doi. 10.1371/journal.pone.0100719

By:

Kuypers, Kim P. C.;
de la Torre, Rafael;
Farre, Magi;
Yubero-Lahoz, Samanta;
Dziobek, Isabel;
Van den Bos, Wouter;
Ramaekers, Johannes G.

Publication type:

Article

Escitalopram Decreases Cross-Regional Functional Connectivity within the Default-Mode Network.

Published in:

PLoS ONE, 2013, v. 8, n. 6, p. 1, doi. 10.1371/journal.pone.0068355

By:

van de Ven, Vincent;
Wingen, Marleen;
Kuypers, Kim P. C.;
Ramaekers, Johannes G.;
Formisano, Elia

Publication type:

Article

Psychomotor Function in Chronic Daily Cannabis Smokers during Sustained Abstinence.

Published in:

PLoS ONE, 2013, v. 8, n. 1, p. 1, doi. 10.1371/journal.pone.0053127

By:

Bosker, Wendy M.;
Karschner, Erin L.;
Lee, Dayong;
Goodwin, Robert S.;
Hirvonen, Jussi;
Innis, Robert B.;
Theunissen, Eef L.;
Kuypers, Kim P. C.;
Huestis, Marilyn A.;
Ramaekers, Johannes G.

Publication type:

Article

Effects of Acute MDMA Intoxication on Mood and Impulsivity: Role of the 5-HT2 and 5-HT1 Receptors.

Published in:

PLoS ONE, 2012, v. 7, n. 7, p. 1, doi. 10.1371/journal.pone.0040187

By:

van Wel, Janelle H. P.;
Kuypers, Kim P. C.;
Theunissen, Eef L.;
Bosker, Wendy M.;
Bakker, Katja;
Ramaekers, Johannes G.

Publication type:

Article

Increased Temporal Discounting in Social Anxiety Disorder Normalizes after Oxytocin Treatment.

Published in:

2019

By:

Hurlemann, René;
Scheele, Dirk;
Kinfe, Thomas M.;
Berger, Ruben;
Philipsen, Alexandra;
Voncken, Marisol J.;
Kuypers, Kim P.C.;
Schruers, Koen;
Kinfe, Thomas M;
Voncken, Marisol J;
Kuypers, Kim P C

Publication type:

Letter

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

Published in:

Psychopharmacology, 2025, v. 242, n. 6, p. 1363, doi. 10.1007/s00213-024-06734-2

By:

Prevete, Elisabeth;
Theunissen, Eef L.;
Kuypers, Kim P. C.;
Paci, Riccardo;
Reckweg, Johannes T.;
Cavarra, Mauro;
Toennes, Stefan W.;
Ritscher, Sabrina;
Bersani, Giuseppe;
Corazza, Ornella;
Pasquini, Massimo;
Ramaekers, Johannes G.

Publication type:

Article

Psychotomimetic symptoms after a moderate dose of a synthetic cannabinoid (JWH-018): implications for psychosis.

Published in:

Psychopharmacology, 2022, v. 239, n. 5, p. 1251, doi. 10.1007/s00213-021-05768-0

By:

Theunissen, Eef L.;
Reckweg, Johannes T.;
Hutten, Nadia R. P. W.;
Kuypers, Kim P. C.;
Toennes, Stefan W.;
Neukamm, Merja A.;
Halter, Sebastian;
Ramaekers, Johannes G.

Publication type:

Article

Neurocognition and subjective experience following acute doses of the synthetic cannabinoid JWH-018: a phase 1, placebo-controlled, pilot study.

Published in:

2018

By:

Theunissen, Eef L.;
Hutten, Nadia R. P. W.;
Mason, Natasha L.;
Toennes, Stefan W.;
Kuypers, Kim P. C.;
de Sousa Fernandes Perna, Eliza B.;
Ramaekers, Johannes G.

Publication type:

journal article

Medicinal Δ9-tetrahydrocannabinol (dronabinol) impairs on-the-road driving performance of occasional and heavy cannabis users but is not detected in Standard Field Sobriety Tests.

Published in:

2012

By:

Bosker, Wendy M.;
Kuypers, Kim P. C.;
Theunissen, Eef L.;
Surinx, Anke;
Blankespoor, Roos J.;
Skopp, Gisela;
Jeffery, Wayne K.;
Walls, H. Chip;
Leeuwen, Cees J.;
Ramaekers, Johannes G.

Publication type:

Journal Article

Medicinal Δ9-tetrahydrocannabinol (dronabinol) impairs on-the-road driving performance of occasional and heavy cannabis users but is not detected in Standard Field Sobriety Tests.

Published in:

Addiction, 2012, v. 107, n. 10, p. 1837, doi. 10.1111/j.1360-0443.2012.03928.x

By:

Bosker, Wendy M.;
Kuypers, Kim P. C.;
Theunissen, Eef L.;
Surinx, Anke;
Blankespoor, Roos J.;
Skopp, Gisela;
Jeffery, Wayne K.;
Walls, H. Chip;
Leeuwen, Cees J.;
Ramaekers, Johannes G.

Publication type:

Article

Motives and Side-Effects of Microdosing With Psychedelics Among Users.

Published in:

International Journal of Neuropsychopharmacology, 2019, v. 22, n. 7, p. 426, doi. 10.1093/ijnp/pyz029

By:

Hutten, Nadia R P W;
Mason, Natasha L;
Dolder, Patrick C;
Kuypers, Kim P C

Publication type:

Article

Self-Rated Effectiveness of Microdosing With Psychedelics for Mental and Physical Health Problems Among Microdosers.

Published in:

Frontiers in Psychiatry, 2019, p. 1, doi. 10.3389/fpsyt.2019.00672

By:

Hutten, Nadia R. P. W.;
Mason, Natasha L.;
Dolder, Patrick C.;
Kuypers, Kim P. C.

Publication type:

Article

Potential analgesic effects of psychedelics on select chronic pain conditions: A survey study.

Published in:

European Journal of Pain, 2024, v. 28, n. 1, p. 153, doi. 10.1002/ejp.2171

By:

Cavarra, Mauro;
Mason, Natasha Leigh;
Kuypers, Kim P. C.;
Bonnelle, Valerie;
Smith, Will J.;
Feilding, Amanda;
Kryskow, Pamela;
Ramaekers, Johannes G.

Publication type:

Article

A single dose of cocaine enhances prospective memory performance.

Published in:

2018

By:

Hutten, Nadia R. P. W.;
Kuypers, Kim P. C.;
van Wel, Janelle H. P.;
Theunissen, Eef L.;
Ramaekers, Johannes G.;
Toennes, Stefan W.;
Verkes, Robbert-Jan;
Hutten, Nadia Rpw;
Kuypers, Kim Pc;
van Wel, Janelle Hp

Publication type:

journal article

Multifaceted empathy of healthy volunteers after single doses of MDMA: A pooled sample of placebo-controlled studies.

Published in:

2017

By:

Kuypers, Kim P. C.;
Ramaekers, Johannes G.;
Dolder, Patrick C.;
Liechti, Matthias E.;
Kuypers, Kim Pc

Publication type:

journal article

Transient memory impairment after acute dose of 75 mg 3.4-Methylene-dioxymethamphetamine.

Published in:

Journal of Psychopharmacology, 2005, v. 19, n. 6, p. 633, doi. 10.1177/0269881105056670

By:

Kuypers, Kim P. C.;
Ramaekers, Jan G.

Publication type:

Article

Self-Rated Effectiveness of Ayahuasca and Breathwork on Well-Being, Psychological Resilience, Self-Compassion, and Personality: An Observational Comparison Study.

Published in:

Psychoactives, 2024, v. 3, n. 2, p. 167, doi. 10.3390/psychoactives3020011

By:

Khubsing, Rishma S. I.;
Leerdam, Martin van;
Haijen, Eline C. H. M.;
Kuypers, Kim P. C.

Publication type:

Article

Involvement of Inferior Parietal Lobules in Prospective Memory Impairment during Acute MDMA (Ecstasy) Intoxication: An Event-Related fMRI Study.

Published in:

Neuropsychopharmacology, 2009, v. 34, n. 7, p. 1641, doi. 10.1038/npp.2008.219

By:

Ramaekers, Johannes G.;
Kuypers, Kim P. C.;
Wingen, Marleen;
Heinecke, Armin;
Formisano, Elia

Publication type:

Article

Acute Effects of 3,4-Methylenedioxymethamphetamine (MDMA) on Behavioral Measures of Impulsivity: Alone and in Combination with Alcohol.

Published in:

Neuropsychopharmacology, 2006, v. 31, n. 5, p. 1048, doi. 10.1038/sj.npp.1300894

By:

Ramaekers, Johannes G.;
Kuypers, Kim P. C.

Publication type:

Article

Decreases in State and Trait Anxiety Post-psilocybin: A Naturalistic, Observational Study Among Retreat Attendees.

Published in:

Frontiers in Psychiatry, 2022, v. 13, p. 1, doi. 10.3389/fpsyt.2022.883869

By:

Kiraga, Maggie Kamila;
Kuypers, Kim P. C.;
Uthaug, Malin Vedoy;
Ramaekers, Johannes G.;
Mason, Natasha Leigh

Publication type:

Article

Psychedelics and Neuroplasticity: A Systematic Review Unraveling the Biological Underpinnings of Psychedelics.

Published in:

Frontiers in Psychiatry, 2021, v. 12, p. 1, doi. 10.3389/fpsyt.2021.724606

By:

de Vos, Cato M. H.;
Mason, Natasha L.;
Kuypers, Kim P. C.

Publication type:

Article

Psychedelic-Assisted Psychotherapy—A Systematic Review of Associated Psychological Interventions.

Published in:

Frontiers in Psychology, 2022, v. 13, p. 1, doi. 10.3389/fpsyg.2022.887255

By:

Cavarra, Mauro;
Falzone, Alessandra;
Ramaekers, Johannes G.;
Kuypers, Kim P. C.;
Mento, Carmela

Publication type:

Article

Self-Rated Recovery and Mood Before and After Resistance Training and Muscle Microcurrent Application.

Published in:

Frontiers in Psychology, 2022, v. 13, p. 1, doi. 10.3389/fpsyg.2022.836695

By:

Stößlein, Bernd A. C.;
Kuypers, Kim P. C.

Publication type:

Article

Persisting Effects of Ayahuasca on Empathy, Creative Thinking, Decentering, Personality, and Well-Being.

Published in:

Frontiers in Pharmacology, 2021, v. 12, p. 1, doi. 10.3389/fphar.2021.721537

By:

Kiraga, Maggie K.;
Mason, Natasha L.;
Uthaug, Malin V.;
van Oorsouw, Kim I.M.;
Toennes, Stefan W.;
Ramaekers, Johannes G.;
Kuypers, Kim P. C.

Publication type:

Article

Sustained attention and serotonin: a pharmaco-fMRI study.

Published in:

Human Psychopharmacology: Clinical & Experimental, 2008, v. 23, n. 3, p. 221, doi. 10.1002/hup.923

By:

Wingen, Marleen;
Kuypers, Kim P. C.;
Van de Ven, Vincent;
Formisano, Elia;
Ramaekers, Johannes G.

Publication type:

Article

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

Published in:

Translational Psychiatry, 2024, v. 14, n. 1, p. 1, doi. 10.1038/s41398-024-03013-8

By:

Hutten, Nadia R. P. W.;
Quaedflieg, Conny W. E. M.;
Mason, Natasha L.;
Theunissen, Eef L.;
Liechti, Matthias E.;
Duthaler, Urs;
Kuypers, Kim P. C.;
Bonnelle, Valerie;
Feilding, Amanda;
Ramaekers, Johannes G.

Publication type:

Article

Safety Profile and Neurocognitive Function Following Acute 4-Fluoroamphetamine (4-FA) Administration in Humans.

Published in:

Frontiers in Pharmacology, 2018, p. N.PAG, doi. 10.3389/fphar.2018.00713

By:

de Sousa Fernandes Perna, Eliza B.;
Theunissen, Eef L.;
Dolder, Patrick C.;
Mason, Natasha L.;
Hutten, Nadia R. P. W.;
Toennes, Stefan W.;
Kuypers, Kim P. C.;
Ramaekers, Johannes G.

Publication type:

Article

Dose-related effects of MDMA on psychomotor function and mood before, during, and after a night of sleep loss.

Published in:

Psychopharmacology, 2010, v. 209, n. 1, p. 69, doi. 10.1007/s00213-009-1767-1

By:

Bosker, Wendy M.;
Kuypers, Kim P. C.;
Conen, Silke;
Ramaekers, Johannes G.

Publication type:

Article

The role of 5-HT1a and 5-HT2a receptors in attention and motor control: a mechanistic study in healthy volunteers.

Published in:

Psychopharmacology, 2007, v. 190, n. 3, p. 391, doi. 10.1007/s00213-006-0614-x

By:

Wingen, Marleen;
Kuypers, Kim P. C.;
Ramaekers, Johannes G.

Publication type:

Article

Acute dose of MDMA (75 mg) impairs spatial memory for location but leaves contextual processing of visuospatial information unaffected.

Published in:

Psychopharmacology, 2007, v. 189, n. 4, p. 557, doi. 10.1007/s00213-006-0321-7

By:

Kuypers, Kim P. C.;
Ramaekers, Johannes G.

Publication type:

Article

Verbal Memory Impairment in Polydrug Ecstasy Users: A Clinical Perspective.

Published in:

PLoS ONE, 2016, v. 11, n. 2, p. 1, doi. 10.1371/journal.pone.0149438

By:

Kuypers, Kim P. C.;
Theunissen, Eef L.;
van Wel, Janelle H. P.;
de Sousa Fernandes Perna, Elizabeth B.;
Linssen, Anke;
Sambeth, Anke;
Schultz, Benjamin G.;
Ramaekers, Johannes G.

Publication type:

Article

Independent elevation of peripheral oxytocin concentrations and reduction in cognitive empathy during 4‐fluoroamphetamine intoxication.

Published in:

Human Psychopharmacology: Clinical & Experimental, 2018, v. 33, n. 6, p. N.PAG, doi. 10.1002/hup.2680

By:

Dolder, Patrick C.;
Sousa Fernandes Perna, Elizabeth B.;
Mason, Natasha L.;
Hutten, Nadia R. P. W.;
Toennes, Stefan W.;
Theunissen, Eef L.;
Ramaekers, Johannes G.;
Kuypers, Kim P. C.

Publication type:

Article

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

Published in:

Journal of Psychoactive Drugs, 2024, v. 56, n. 4, p. 485, doi. 10.1080/02791072.2023.2242361

By:

Prevete, Elisabeth;
Catalani, Valeria;
Singh, Darshan;
Kuypers, Kim P. C.;
Theunissen, Eef L.;
Townshend, Honor D.;
Banayoti, Hani;
Ramaekers, Johannes G.;
Pasquini, Massimo;
Corazza, Ornella

Publication type:

Article

Sub-Acute Effects of Psilocybin on Empathy, Creative Thinking, and Subjective Well-Being.

Published in:

2019

By:

Mason, Natasha L.;
Uthaug, Malin V.;
Kuypers, Kim P. C.;
Mischler, Elisabeth

Publication type:

journal article

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.

Published in:

European Psychiatry, 2024, v. 67, n. 1, p. 1, doi. 10.1192/j.eurpsy.2024.8

By:

Haijen, Eline C. H. M.;
Hurks, Petra P. M.;
Kuypers, Kim P. C.

Publication type:

Article

Emotional Empathic Responses to Dynamic Negative Affective Stimuli Is Gender-Dependent.

Published in:

Frontiers in Psychology, 2017, p. 1, doi. 10.3389/fpsyg.2017.01491

By:

Kuypers, Kim P. C.

Publication type:

Article

MDMA-Induced Dissociative State not Mediated by the 5-HT2A Receptor.

Published in:

Frontiers in Pharmacology, 2017, p. 1, doi. 10.3389/fphar.2017.00455

By:

Puxty, Drew J.;
Ramaekers, Johannes G.;
de la Torre, Rafael;
Farré, Magí;
Pizarro, Neus;
Pujadas, Mitona;
Kuypers, Kim P. C.

Publication type:

Article

Author Correction: Psilocybin microdosers demonstrate greater observed improvements in mood and mental health at one month relative to non-microdosing controls.

Published in:

2022

By:

Rootman, Joseph M.;
Kiraga, Maggie;
Kryskow, Pamela;
Harvey, Kalin;
Stamets, Paul;
Santos-Brault, Eesmyal;
Kuypers, Kim P. C.;
Walsh, Zach

Publication type:

Correction Notice

Psilocybin microdosers demonstrate greater observed improvements in mood and mental health at one month relative to non-microdosing controls.

Published in:

Scientific Reports, 2022, v. 12, n. 1, p. 1, doi. 10.1038/s41598-022-14512-3

By:

Rootman, Joseph M.;
Kiraga, Maggie;
Kryskow, Pamela;
Harvey, Kalin;
Stamets, Paul;
Santos-Brault, Eesmyal;
Kuypers, Kim P. C.;
Walsh, Zach

Publication type:

Article

Psilocybin microdosers demonstrate greater observed improvements in mood and mental health at one month relative to non-microdosing controls.

Published in:

Scientific Reports, 2022, v. 12, n. 1, p. 1, doi. 10.1038/s41598-022-14512-3

By:

Rootman, Joseph M.;
Kiraga, Maggie;
Kryskow, Pamela;
Harvey, Kalin;
Stamets, Paul;
Santos-Brault, Eesmyal;
Kuypers, Kim P. C.;
Walsh, Zach

Publication type:

Article

Corrigendum: Self-rated recovery and mood before and after resistance training and muscle microcurrent application.

Published in:

2025

By:

Stößlein, Bernd A. C.;
Kuypers, Kim P. C.

Publication type:

Correction Notice

Self-Rated Recovery and Mood Before and After Resistance Training and Muscle Microcurrent Application.

Published in:

Frontiers in Psychology, 2025, p. 1, doi. 10.3389/fpsyg.2022.836695

By:

Stößlein, Bernd A. C.;
Kuypers, Kim P. C.

Publication type:

Article

Trait mindfulness and personality characteristics in a microdosing ADHD sample: a naturalistic prospective survey study.

Published in:

Frontiers in Psychiatry, 2023, p. 1, doi. 10.3389/fpsyt.2023.1233585

By:

Haijen, Eline C. H. M.;
Hurks, Petra P. M.;
Kuypers, Kim P. C.

Publication type:

Article

Motives for Classical and Novel Psychoactive Substances Use in Psychedelic Polydrug Users.

Published in:

Contemporary Drug Problems, 2019, v. 46, n. 3, p. 304, doi. 10.1177/0091450919863899

By:

Kettner, Hannes;
Mason, Natasha L.;
Kuypers, Kim P. C.

Publication type:

Article

Brain reactivity to alcohol and cannabis marketing during sobriety and intoxication.

Published in:

2017

By:

Sousa Fernandes Perna, Elizabeth B.;
Theunissen, Eef L.;
Kuypers, Kim P. C.;
Evers, Elisabeth A.;
Stiers, Peter;
Toennes, Stefan W.;
Witteman, Jurriaan;
Dalen, Wim;
Ramaekers, Johannes G.

Publication type:

journal article