World's Best Scientists 2026 revealed!
Roger F. Butterworth

Roger F. Butterworth

D-Index & Metrics

Medicine

D-Index
95
Citations
28027
World Ranking
10180
National Ranking
406

Roger F. Butterworth 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 Roger F. Butterworth 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: 464 publications — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Roger F. Butterworth 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 Roger F. Butterworth 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: 95 D-Index — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Overview

Roger F. Butterworth is affiliated with the University of Montreal in Canada and has contributed to medical research primarily in the field of Medicine, with a focus on Infectious Diseases, Neurology, Hepatology, Epidemiology, and Cardiology and Cardiovascular Medicine.

Their work covers a range of topics, notably:

  • Long-Term Effects of COVID-19
  • COVID-19 Clinical Research Studies
  • Liver Disease and Transplantation
  • Liver Disease Diagnosis and Treatment
  • Infectious Encephalopathies and Encephalitis
  • Cardiac, Anesthesia and Surgical Outcomes
  • Respiratory Support and Mechanisms

Roger F. Butterworth has published research primarily in the following venues:

  • Journal of Pharmaceutics & Pharmacology (3 publications)
  • Drugs in R&D (2 publications)
  • Frontiers in Neuroscience (1 publication)
  • Metabolic Brain Disease (1 publication)
  • International Journal of Obstetric Anesthesia (1 publication)

Frequent coauthors collaborating with Butterworth include:

  • Vorakamol Phoophiboon
  • Antenor Rodrigues
  • Matthew Ko
  • Mayson Laércio de Araújo Sousa
  • Annia Schreiber

Selected recent papers highlight the range and focus of their research. These include:

  • "Potential for the Repurposing of Adamantane Antivirals for COVID-19," 2021, published in Drugs in R&D
  • "Ammonia Removal by Metabolic Scavengers for the Prevention and Treatment of Hepatic Encephalopathy in Cirrhosis," 2021, published in Drugs in R&D
  • "Adamantanes for the treatment of neurodegenerative diseases in the presence of SARS-CoV-2," 2023, published in Frontiers in Neuroscience
  • "Region-selective permeability of the blood-brain barrier to α-aminoisobutyric acid during thiamine deficiency and following its reversal," 2020, published in Metabolic Brain Disease
  • "Potential for the Repurposing of Adamantanes for the Treatment of Covid-19," 2020, published in Journal of Pharmaceutics & Pharmacology

The research consistently addresses neurological and infectious diseases in the context of the COVID-19 pandemic, as well as liver-related disorders such as hepatic encephalopathy. Investigations into mechanisms such as blood-brain barrier permeability and antiviral repurposing are recurrent themes in Butterworth's work.

Best Publications

  • Neurobiology of ammonia

    Vicente Felipo;Roger F. Butterworth

  • Ammonia: key factor in the pathogenesis of hepatic encephalopathy.

    Roger F. Butterworth;Jean-François Giguère;Jean Michaud;Joël Lavoie

  • The nutritional management of hepatic encephalopathy in patients with cirrhosis: International society for hepatic encephalopathy and nitrogen metabolism consensus

    Piero Amodio;Chantal Bemeur;Roger Butterworth;Juan Cordoba

  • Pathophysiology of hepatic encephalopathy: a new look at ammonia.

    Roger F. Butterworth

  • Review article: the design of clinical trials in hepatic encephalopathy - an International Society for Hepatic Encephalopathy and Nitrogen Metabolism (ISHEN) consensus statement

    J. S. Bajaj;J. Cordoba;Kevin D Mullen;P. Amodio

  • Ammonia and related amino acids in the pathogenesis of brain edema in acute ischemic liver failure in rats.

    Margaret Swain;Roger F. Butterworth;Andres T. Blei

  • Hepatic encephalopathy: An update of pathophysiologic mechanisms.

    Alan S. Hazell;Roger F. Butterworth

  • Increased blood manganese in cirrhotic patients: Relationship to pallidal magnetic resonance signal hyperintensity and neurological symptoms

    L Spahr;R F Butterworth;S Fontaine;L Bui

  • Ammonia-induced brain edema and intracranial hypertension in rats after portacaval anastomosis

    Andres T. Blei;Sigurdur Olafsson;Guy Therrien;Roger F. Butterworth

  • Experimental models of hepatic encephalopathy: ISHEN guidelines.

    Roger F. Butterworth;Michael D. Norenberg;Vicente Felipo;Peter Ferenci

  • Manganese deposition in basal ganglia structures results from both portal-systemic shunting and liver dysfunction

    Christopher F. Rose;Roger F. Butterworth;Joseph Zayed;Louise Normandin

  • Ammonia induces MK-801-sensitive nitration and phosphorylation of protein tyrosine residues in rat astrocytes.

    Freimut Schliess;Boris Görg;Richard Fischer;Paul Desjardins

  • Selective increase of brain lactate synthesis in experimental acute liver failure: Results of a [1H-13C] nuclear magnetic resonance study

    Claudia Zwingmann;Nicolas Chatauret;Dieter Leibfritz;Roger F. Butterworth

  • Complications of cirrhosis III. Hepatic encephalopathy

    Roger F. Butterworth

  • Amino acid changes in autopsied brain tissue from cirrhotic patients with hepatic encephalopathy.

    Joël Lavoie;Jean-Francois Giguère;Gilles Pomier Layrargues;Roger F. Butterworth

  • Hepatic encephalopathy: a central neuroinflammatory disorder?

    Roger F. Butterworth

  • Thiamine-dependent enzyme changes in the brains of alcoholics: relationship to the Wernicke-Korsakoff syndrome.

    Roger F. Butterworth;Jillian J. Kril;Clive G. Harper

  • Manganese toxicity, dopaminergic dysfunction and hepatic encephalopathy

    Roger F. Butterworth;Laurent Spahr;Suzanne Fontaine;Gilles Pomier Layrargues

  • Effect of ammonium ions on synaptic transmission in the mammalian central nervous system.

    John C. Szerb;Roger F. Butterworth

  • Thiamine-dependent enzyme changes in temporal cortex of patients with Alzheimer's disease

    Roger F. Butterworth;Anne Marie Besnard

Frequent Co-Authors

Alan S. Hazell
Alan S. Hazell University of Montreal
Glen B. Baker
Glen B. Baker University of Alberta
Dieter Leibfritz
Dieter Leibfritz University of Bremen
Andres T. Blei
Andres T. Blei Northwestern University
Edith Hamel
Edith Hamel Montreal Neurological Institute and Hospital
Vicente Felipo
Vicente Felipo Centro de Investigacion Principe Felipe
Peter R. Dodd
Peter R. Dodd University of Queensland
Stephen Hanessian
Stephen Hanessian University of Montreal
Tomás A. Reader
Tomás A. Reader University of Montreal
Jillian J. Kril
Jillian J. Kril University of Sydney

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