OOIR: Observatory of International Research

Papers

(The H4-Index of Journal of Psychopharmacology is 32. 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 2022-05-01 to 2026-05-01.)

Article	Citations
Cannabimimetic and discriminative stimulus effects of hexahydrocannabinols in mice	196
Effects of initial nicotine exposure on cognition and nicotine reinforcement among non-smoking young adults with and without attention deficit hyperactivity disorder	137
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	125
Science, safety and education: Informing the psychedelic treatment of psychiatric disorders	93
Co-use of psychedelics with other substances: Findings from the global psychedelic survey	70
Circadian rhythmicity in prepulse inhibition of the acoustic startle response: A study of chronotype and time-of-day effects in young healthy adults	57
Meditating on psychedelics. A randomized placebo-controlled study of DMT and harmine in a mindfulness retreat	54
The effects of the PDE4 inhibitor roflumilast on cognitive performance after a cerebrovascular accident: a double-blind randomized placebo-controlled trial with an open label extension (ROSTMEMA)	53
Off the RADAR; questions regarding the trial protocol of a randomised controlled trial of antipsychotic reduction and discontinuation	51
The revival of the psychedelic experience scale: Revealing its extended-mystical, visual, and distressing experiential spectrum with LSD and psilocybin studies	51
Preliminary evidence that serum interleukin-6 is a candidate biomarker of response to esketamine in treatment-resistant depression	51
Deaths related to the use of diarylethylamines, with a focus on the United Kingdom: A systematic review and case series report	50
Award winning abstracts presented at the 15 ^th Annual International College of Mental Health Pharmacy (CMHP) Conference, Liverpool, UK, on 10	50
Effectiveness of vortioxetine in elderly patients with major depressive disorder in real-world clinical practice: Results from the RELIEVE study	47
Interactions between classic psychedelics and serotonergic antidepressants: Effects on the acute psychedelic subjective experience, well-being and depressive symptoms from a prospective survey study	46
Psychedelics and the ‘inner healer’: Myth or mechanism?	45
Proportion of Antipsychotics with CYP2D6 Pharmacogenetic (PGx) Associations Prescribed in an Early Intervention in Psychosis (EIP) Cohort: A Cross-Sectional Study	45
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	43
Relationship between change in social evaluation learning and mood in early antidepressant treatment: A prospective cohort study in primary care	41
Solriamfetol improves daily fatigue symptoms in adults with myalgic encephalomyelitis/chronic fatigue syndrome after 8 weeks of treatment	41
Pharmaco-fUS in cognitive impairment: Lessons from a preclinical model	41
The effects of antenatal depression and SSRI exposure on children: A systematic review	40
Associations between regular cannabis use and brain resting-state functional connectivity in adolescents and adults	39
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	36
A reflection on paradigmatic tensions within the FDA advisory committee for MDMA-assisted therapy	36

Comparison of average time-to-relapse following ECT versus ketamine – A systematic review	36
A framework for assessment of adverse events occurring in psychedelic-assisted therapies	36
Cannabidiol in clinical and preclinical anxiety research. A systematic review into concentration–effect relations using the IB-de-risk tool	35
Psychedelic research – Going global	34
Haloperidol dopamine receptor occupancy and antagonism correspond to delirium agitation scores and EPS risk: A PBPK-PD modeling analysis	33
Not too quick on “Debunking the myth of ‘Blue Mondays’”	33
Serotonin release by parachloroamphetamine in rats with high and low sociability: High prefrontal release capacity in sociable females	32