World's Best Scientists 2026 revealed!
Iain S. McGregor

Iain S. McGregor

D-Index & Metrics

Medicine

D-Index
90
Citations
24619
World Ranking
12364
National Ranking
400

Iain S. McGregor publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Iain S. McGregor sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 355 publications — 29th percentile

29% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Iain S. McGregor D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Iain S. McGregor sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 90 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Iain S. McGregor is affiliated with the University of Sydney in Australia. Their research primarily focuses on the field of Medicine, with significant contributions to subfields such as Pharmacology, Cellular and Molecular Neuroscience, Clinical Psychology, Toxicology, and Cognitive Neuroscience.

The scientist's published work covers a range of topics related to cannabis, its effects, and related areas. Main topics include:

  • Cannabis and Cannabinoid Research
  • Forensic Toxicology and Drug Analysis
  • Sleep and Wakefulness Research
  • Sleep and Related Disorders
  • Prenatal Substance Exposure Effects
  • Neuroscience and Neuropharmacology Research
  • Substance Abuse Treatment and Outcomes

They have authored or co-authored numerous papers, including recent publications such as:

  • "Effect of Cannabidiol and Δ9-Tetrahydrocannabinol on Driving Performance" (2020), published in JAMA
  • "Cannabinoid Therapies in the Management of Sleep Disorders: A Systematic Review of Preclinical and Clinical Studies" (2020), published in Sleep Medicine Reviews
  • "Determining the Magnitude and Duration of Acute Δ9-Tetrahydrocannabinol (Δ9-THC)-Induced Driving and Cognitive Impairment: A Systematic and Meta-Analytic Review" (2021), published in Neuroscience & Biobehavioral Reviews
  • "Medical Cannabis Use in the Australian Community Following Introduction of Legal Access: the 2018-2019 Online Cross-Sectional Cannabis as Medicine Survey (CAMS-18)" (2020), published in Harm Reduction Journal
  • "Oral THC:CBD Cannabis Extract for Refractory Chemotherapy-Induced Nausea and Vomiting: a Randomised, Placebo-Controlled, Phase II Crossover Trial" (2020), published in Annals of Oncology

The scientist frequently publishes in venues such as:

  • Sports Medicine - Open
  • ACS Chemical Neuroscience
  • Journal of Cannabis Research
  • Cannabis and Cannabinoid Research
  • Psychopharmacology

Collaborations feature prominently in their work. Frequent co-authors include:

  • Jonathon C. Arnold
  • Anastasia Suraev
  • Danielle McCartney
  • Richard C. Kevin
  • Christopher Irwin

Best Publications

  • The effects of predator odors in mammalian prey species: A review of field and laboratory studies

    Raimund Apfelbach;Caroline D. Blanchard;Robert J. Blanchard;R. Andrew Hayes

  • ‘When a rat smells a cat’: the distribution of Fos immunoreactivity in rat brain following exposure to a predatory odor

    R.A Dielenberg;G.E Hunt;I.S McGregor

  • Defensive behavior in rats towards predatory odors: a review.

    Robert A. Dielenberg;Iain S. McGregor

  • Chronic cannabinoid exposure produces lasting memory impairment and increased anxiety in adolescent but not adult rats

    Melanie O’Shea;Malini E. Singh;Iain S. McGregor;Paul E. Mallet

  • Adolescent rats find repeated Delta(9)-THC less aversive than adult rats but display greater residual cognitive deficits and changes in hippocampal protein expression following exposure.

    Heidi R Quinn;Izuru Matsumoto;Paul D Callaghan;Leonora E Long

  • A role for oxytocin and 5-HT1A receptors in the prosocial effects of 3,4 methylenedioxymethamphetamine (“ecstasy”)

    M.R. Thompson;P.D. Callaghan;G.E. Hunt;J.L. Cornish

  • Nabiximols as an agonist replacement therapy during cannabis withdrawal: a randomized clinical trial.

    David J. Allsop;Jan Copeland;Nicholas Lintzeris;Adrian J. Dunlop

  • Breaking the loop: oxytocin as a potential treatment for drug addiction.

    Iain S. McGregor;Michael T. Bowen

  • Pharmacology of Valinate and tert-Leucinate Synthetic Cannabinoids 5F-AMBICA, 5F-AMB, 5F-ADB, AMB-FUBINACA, MDMB-FUBINACA, MDMB-CHMICA, and Their Analogues.

    Samuel D. Banister;Mitchell Longworth;Richard Kevin;Shivani Sachdev

  • Trends in the utilisation of psychotropic medications in Australia from 2000 to 2011

    Chris P Stephenson;Emily Karanges;Iain S McGregor

  • Increased motivation for beer in rats following administration of a cannabinoid CB1 receptor agonist.

    Jason E. Gallate;Tanya Saharov;Paul E. Mallet;Iain S. McGregor

  • Not all 'predator odours' are equal: cat odour but not 2,4,5 trimethylthiazoline (TMT; fox odour) elicits specific defensive behaviours in rats.

    Iain S McGregor;Laurens Schrama;Polly Ambermoon;Robert A Dielenberg

  • Modulation of anxiety-related behaviours following lesions of the prelimbic or infralimbic cortex in the rat

    Anthony L Jinks;Iain S McGregor

  • Neural correlates of cat odor-induced anxiety in rats: region-specific effects of the benzodiazepine midazolam.

    Iain S McGregor;Garth A Hargreaves;Raimund Apfelbach;Glenn E Hunt

  • The Direct Actions of Cannabidiol and 2-arachidonoyl Glycerol at GABA A Receptors

    T. Bakas;P.S. van Nieuwenhuijzen;S.O. Devenish;I.S. McGregor

  • Repeated cannabinoid exposure during perinatal, adolescent or early adult ages produces similar longlasting deficits in object recognition and reduced social interaction in rats.

    Melanie O'Shea;Iain S. McGregor;Paul E. Mallet

  • A behavioural comparison of acute and chronic Δ9-tetrahydrocannabinol and cannabidiol in C57BL/6JArc mice

    Leonora E. Long;Rose Chesworth;Rose Chesworth;Xu-Feng Huang;Iain S. McGregor

  • Analysis of cannabis seizures in NSW, Australia: cannabis potency and cannabinoid profile.

    Wendy Swift;Alex Wong;Kong M. Li;Jonathon C. Arnold

  • Pharmacology of Indole and Indazole Synthetic Cannabinoid Designer Drugs AB-FUBINACA, ADB-FUBINACA, AB-PINACA, ADB-PINACA, 5F-AB-PINACA, 5F-ADB-PINACA, ADBICA, and 5F-ADBICA

    Samuel D. Banister;Samuel D. Banister;Michael Moir;Jordyn Stuart;Richard C. Kevin

  • The motivation for beer in rats: effects of ritanserin, naloxone and SR 141716

    Jason E. Gallate;Iain S. McGregor

Frequent Co-Authors

Nicholas Lintzeris
Nicholas Lintzeris University of Sydney
Jennifer L. Cornish
Jennifer L. Cornish Macquarie University
Michael Kassiou
Michael Kassiou University of Sydney
Tim Karl
Tim Karl Western Sydney University
Raimondo Bruno
Raimondo Bruno University of Tasmania
Nicholas H. Hunt
Nicholas H. Hunt University of Sydney
Izuru Matsumoto
Izuru Matsumoto University of Sydney
Adam J. Guastella
Adam J. Guastella University of Sydney
Mary Chebib
Mary Chebib University of Sydney
Ronald R. Grunstein
Ronald R. Grunstein Woolcock Institute of Medical Research

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring related online degrees can provide flexible and cost-effective ways to advance in medicine or healthcare fields. Many students seeking a medical career choose programs that allow them to work and study at the same time. Popular options include nursing tracks and other healthcare specialties.

For those aspiring to become advanced practice nurses on a budget, the cheapest online nurse practitioner programs offer a pathway to higher roles while minimizing financial stress. Entry-level students or working professionals can also consider online nursing courses to build foundational skills or meet prerequisites.

If you already have an RN qualification, pursuing the cheapest rn to bsn program can open doors to broader clinical responsibilities or management roles. Meanwhile, those looking to become leaders in research or education might choose a phd in nursing, designed for the highest levels of academic and professional achievement.

All of these online pathways offer flexible learning environments, helping students balance work, life, and study while pursuing new career opportunities within healthcare.

Best Scientists Citing Iain S. McGregor

Trending Scientists

Recently Published Articles