OOIR: Observatory of International Research

Papers

(The H4-Index of Journal of Psychopharmacology is 28. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-08-01 to 2025-08-01.)

Article	Citations
Which are the demographic and clinical characteristics of patients who respond to subcutaneous esketamine?	283
Science, safety and education: Informing the psychedelic treatment of psychiatric disorders	201
Off the RADAR; questions regarding the trial protocol of a randomised controlled trial of antipsychotic reduction and discontinuation	116
Proportion of Antipsychotics with CYP2D6 Pharmacogenetic (PGx) Associations Prescribed in an Early Intervention in Psychosis (EIP) Cohort: A Cross-Sectional Study	115
Meditating on psychedelics. A randomized placebo-controlled study of DMT and harmine in a mindfulness retreat	82
Glutamate levels across deep brain structures in patients with a psychotic disorder and its relation to cognitive functioning	77
The chronic effects of a combination of herbal extracts (Euphytose^®) on psychological mood state and response to a laboratory stressor: A randomised, placebo-controlled, double blind study	68
Interactions between classic psychedelics and serotonergic antidepressants: Effects on the acute psychedelic subjective experience, well-being and depressive symptoms from a prospective survey study	62
Perceptions of safety, subjective effects, and beliefs about the clinical utility of lysergic acid diethylamide in healthy participants within a novel intervention paradigm: Qualitative results from a	58
The revival of the psychedelic experience scale: Revealing its extended-mystical, visual, and distressing experiential spectrum with LSD and psilocybin studies	51
Co-use of psychedelics with other substances: Findings from the global psychedelic survey	47
Deaths related to the use of diarylethylamines, with a focus on the United Kingdom: A systematic review and case series report	46
Psychedelics and the ‘inner healer’: Myth or mechanism?	44
Relationship between depression, prefrontal creatine and grey matter volume	42
Cannabimimetic and discriminative stimulus effects of hexahydrocannabinols in mice	41
Effects of initial nicotine exposure on cognition and nicotine reinforcement among non-smoking young adults with and without attention deficit hyperactivity disorder	41
Circadian rhythmicity in prepulse inhibition of the acoustic startle response: A study of chronotype and time-of-day effects in young healthy adults	41
Effectiveness of vortioxetine in elderly patients with major depressive disorder in real-world clinical practice: Results from the RELIEVE study	40
Associations between regular cannabis use and brain resting-state functional connectivity in adolescents and adults	39
Relationship between change in social evaluation learning and mood in early antidepressant treatment: A prospective cohort study in primary care	39
The D1/D2-like receptor antagonist flupentixol and the D2-like receptor antagonist L-741626 decrease operant responding for nicotine and food and locomotor activity in male and female rats	38
Cannabidiol in clinical and preclinical anxiety research. A systematic review into concentration–effect relations using the IB-de-risk tool	37
A framework for assessment of adverse events occurring in psychedelic-assisted therapies	37
Effects of 31 recombinant CYP2C19 variants on clomipramine metabolism in vitro	33
An α7 nAChR approach for the baseline-dependent modulation of deviance detection in schizophrenia: A pilot study assessing the combined effect of CDP-choline and galantamine	33

Pharmaco-fUS in cognitive impairment: Lessons from a preclinical model	32
Repurposing psychopharmacology: A two-way street?	32
A reflection on paradigmatic tensions within the FDA advisory committee for MDMA-assisted therapy	31
Elevated C-reactive protein among symptomatic youth with bipolar disorder	28
Ketamine use in a large global sample: Characteristics, patterns of use and emergency medical treatment	28
Haloperidol dopamine receptor occupancy and antagonism correspond to delirium agitation scores and EPS risk: A PBPK-PD modeling analysis	28
Serotonin release by parachloroamphetamine in rats with high and low sociability: High prefrontal release capacity in sociable females	28