Ronald Flegel

1.3k total citations
32 papers, 968 citations indexed

About

Ronald Flegel is a scholar working on Pharmacology, Toxicology and Pathology and Forensic Medicine. According to data from OpenAlex, Ronald Flegel has authored 32 papers receiving a total of 968 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Pharmacology, 23 papers in Toxicology and 9 papers in Pathology and Forensic Medicine. Recurrent topics in Ronald Flegel's work include Cannabis and Cannabinoid Research (24 papers), Forensic Toxicology and Drug Analysis (23 papers) and Alcohol Consumption and Health Effects (9 papers). Ronald Flegel is often cited by papers focused on Cannabis and Cannabinoid Research (24 papers), Forensic Toxicology and Drug Analysis (23 papers) and Alcohol Consumption and Health Effects (9 papers). Ronald Flegel collaborates with scholars based in United States and Morocco. Ronald Flegel's co-authors include Edward J. Cone, John M. Mitchell, Ryan G. Vandrey, George E. Bigelow, Tory R. Spindle, Charles LoDico, Evan S. Herrmann, Eugene D Hayes, Nicolas J. Schlienz and Ruth E. Winecker and has published in prestigious journals such as Drug and Alcohol Dependence, JAMA Network Open and Journal of Analytical Toxicology.

In The Last Decade

Ronald Flegel

28 papers receiving 934 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ronald Flegel United States	16	834	317	164	144	139	32	968
Cristina Sempio United States	17	588 0.7×	314 1.0×	143 0.9×	111 0.8×	108 0.8×	56	869
Eugene W Schwilke United States	18	666 0.8×	540 1.7×	164 1.0×	80 0.6×	109 0.8×	20	980
Shanna Babalonis United States	17	728 0.9×	181 0.6×	284 1.7×	95 0.7×	125 0.9×	37	1.1k
Thomas R. Arkell Australia	13	650 0.8×	202 0.6×	69 0.4×	122 0.8×	177 1.3×	27	727
Dayong Lee United States	19	642 0.8×	556 1.8×	161 1.0×	78 0.5×	80 0.6×	39	915
David M. Schwope United States	18	839 1.0×	596 1.9×	163 1.0×	70 0.5×	53 0.4×	24	1.0k
Madeleine J. Swortwood United States	20	507 0.6×	590 1.9×	174 1.1×	113 0.8×	74 0.5×	43	1.0k
Matthew N. Newmeyer United States	15	511 0.6×	305 1.0×	111 0.7×	70 0.5×	54 0.4×	23	731
Nicolas J. Schlienz United States	17	594 0.7×	112 0.4×	170 1.0×	117 0.8×	192 1.4×	34	873
Marilyn A. Huestis United States	21	918 1.1×	592 1.9×	286 1.7×	320 2.2×	73 0.5×	32	1.4k

Countries citing papers authored by Ronald Flegel

Since Specialization

Citations

This map shows the geographic impact of Ronald Flegel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ronald Flegel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ronald Flegel more than expected).

Fields of papers citing papers by Ronald Flegel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ronald Flegel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ronald Flegel. The network helps show where Ronald Flegel may publish in the future.

Co-authorship network of co-authors of Ronald Flegel

This figure shows the co-authorship network connecting the top 25 collaborators of Ronald Flegel. A scholar is included among the top collaborators of Ronald Flegel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ronald Flegel. Ronald Flegel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Zamarripa, C. Austin, Tory R. Spindle, Edward J. Cone, et al.. (2025). A within-subject cross-over trial comparing the acute effects of oral delta-8-tetrahydrocannabinol and delta-9-tetrahydrocannabinol in healthy adults. Drug and Alcohol Dependence. 272. 112676–112676.

Wolinsky, David Isaac, C. Austin Zamarripa, Tory R. Spindle, et al.. (2025). The acute and chronic pharmacokinetics and pharmacodynamics of oral cannabidiol with and without low doses of delta-9-tetrahydrocannabinol. Journal of Analytical Toxicology.

Grabenauer, Megan, et al.. (2024). Systematic web monitoring of drug test subversion strategies in the United States. Drug Testing and Analysis. 17(1). 34–41.

Vikingsson, Svante, et al.. (2024). Fentanyl as a marker of illicit drug use in morphine-positive urine specimens from workplace drug testing. Journal of Analytical Toxicology. 48(3). 185–190. 2 indexed citations

Zamarripa, C. Austin, Dennis J. Sholler, Edward J. Cone, et al.. (2024). Cannabinoid Content and Label Accuracy of Various Hemp-Derived Haircare, Cosmetic, and Edible Products Available at Retail Stores and Online in the United States. Cannabis and Cannabinoid Research. 10(6). 719–725.

Vikingsson, Svante, et al.. (2023). Conversion of water-soluble CBD to ∆9-THC in synthetic gastric fluid—An unlikely cause of positive drug tests. Journal of Analytical Toxicology. 47(7). 632–635. 2 indexed citations

Vikingsson, Svante, Ruth E. Winecker, Edward J. Cone, et al.. (2023). Prevalence of ∆8-tetrahydrocannabinol carboxylic acid in workplace drug testing. Journal of Analytical Toxicology. 47(8). 719–725. 6 indexed citations

Spindle, Tory R., Dennis J. Sholler, Edward J. Cone, et al.. (2022). Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores. JAMA Network Open. 5(7). e2223019–e2223019. 36 indexed citations

Vikingsson, Svante, Ruth E. Winecker, Edward J. Cone, et al.. (2022). Prevalence of Cannabidiol, ∆9- and ∆8-Tetrahydrocannabinol and Metabolites in Workplace Drug Testing Urine Specimens. Journal of Analytical Toxicology. 46(8). 866–874. 6 indexed citations

10.

Vikingsson, Svante, et al.. (2021). Conversion of 7-Carboxy-Cannabidiol (7-COOH-CBD) to 11-Nor-9-Carboxy-Tetrahydrocannabinol (THC-COOH) during Sample Preparation for GC–MS Analysis. Journal of Analytical Toxicology. 46(5). 573–576. 9 indexed citations

11.

Schlienz, Nicolas J., Tory R. Spindle, Edward J. Cone, et al.. (2020). Pharmacodynamic dose effects of oral cannabis ingestion in healthy adults who infrequently use cannabis. Drug and Alcohol Dependence. 211. 107969–107969. 63 indexed citations

12.

Spindle, Tory R., Edward J. Cone, Elise M. Weerts, et al.. (2020). Pharmacodynamic effects of vaporized and oral cannabidiol (CBD) and vaporized CBD-dominant cannabis in infrequent cannabis users. Drug and Alcohol Dependence. 211. 107937–107937. 88 indexed citations

13.

Spindle, Tory R., Edward J. Cone, D Kuntz, et al.. (2019). Urinary Pharmacokinetic Profile of Cannabinoids Following Administration of Vaporized and Oral Cannabidiol and Vaporized CBD-Dominant Cannabis. Journal of Analytical Toxicology. 44(2). 109–125. 37 indexed citations

14.

Spindle, Tory R., Edward J. Cone, Nicolas J. Schlienz, et al.. (2018). Acute Effects of Smoked and Vaporized Cannabis in Healthy Adults Who Infrequently Use Cannabis. JAMA Network Open. 1(7). e184841–e184841. 190 indexed citations

15.

Spindle, Tory R., Edward J. Cone, Nicolas J. Schlienz, et al.. (2018). Acute Pharmacokinetic Profile of Smoked and Vaporized Cannabis in Human Blood and Oral Fluid. Journal of Analytical Toxicology. 43(4). 233–258. 85 indexed citations

16.

Vandrey, Ryan G., Evan S. Herrmann, John M. Mitchell, et al.. (2017). Pharmacokinetic Profile of Oral Cannabis in Humans: Blood and Oral Fluid Disposition and Relation to Pharmacodynamic Outcomes. Journal of Analytical Toxicology. 41(2). 83–99. 162 indexed citations

17.

Grabenauer, Megan, Katherine Moore, Robert M. White, et al.. (2017). Detection and quantification of codeine-6-glucuronide, hydromorphone-3-glucuronide, oxymorphone-3-glucuronide, morphine 3-glucuronide and morphine-6-glucuronide in human hair from opioid users by LC–MS-MS. Journal of Analytical Toxicology. 42(2). 115–125. 15 indexed citations

18.

DePriest, Anne Z., Rebecca Heltsley, David L. Black, et al.. (2016). Prescription Opioids. V. Metabolism and Excretion of Oxymorphone in Urine Following Controlled Single Dose Administration. Journal of Analytical Toxicology. 40(8). 566–574. 3 indexed citations

19.

DePriest, Anne Z., Rebecca Heltsley, David L. Black, et al.. (2016). Prescription Opioids. VI. Metabolism and Excretion of Hydromorphone in Urine Following Controlled Single-Dose Administration. Journal of Analytical Toxicology. 40(8). 575–582. 3 indexed citations

20.

Cone, Edward J., George E. Bigelow, Evan S. Herrmann, et al.. (2015). Nonsmoker Exposure to Secondhand Cannabis Smoke. III. Oral Fluid and Blood Drug Concentrations and Corresponding Subjective Effects. Journal of Analytical Toxicology. 39(7). 497–509. 37 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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