Roumen Sedefov

2.7k total citations · 1 hit paper
38 papers, 1.7k citations indexed

About

Roumen Sedefov is a scholar working on Toxicology, Pharmacology and Epidemiology. According to data from OpenAlex, Roumen Sedefov has authored 38 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Toxicology, 9 papers in Pharmacology and 9 papers in Epidemiology. Recurrent topics in Roumen Sedefov's work include Forensic Toxicology and Drug Analysis (22 papers), Opioid Use Disorder Treatment (8 papers) and Poisoning and overdose treatments (7 papers). Roumen Sedefov is often cited by papers focused on Forensic Toxicology and Drug Analysis (22 papers), Opioid Use Disorder Treatment (8 papers) and Poisoning and overdose treatments (7 papers). Roumen Sedefov collaborates with scholars based in Portugal, United Kingdom and Spain. Roumen Sedefov's co-authors include Paul Griffiths, Tim Pfeiffer-Gerschel, David M. Wood, Paul I. Dargan, Michael Evans‐Brown, Andrew Cunningham, Ana Gallegos, Deborah I. Olszewski, Rachel Christie and Teodora Groshkova and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and Journal of Ethnopharmacology.

In The Last Decade

Roumen Sedefov

38 papers receiving 1.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

New psychoactive substances: challenges for drug surveillance, control, and public health responses

2019 216 citations Roumen Sedefov, Paul Griffiths et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Roumen Sedefov Portugal	19	1.0k	586	439	364	325	38	1.7k
Vigdis Vindenes Norway	23	898 0.9×	235 0.4×	470 1.1×	264 0.7×	268 0.8×	87	1.7k
Raffaele Giorgetti Italy	24	839 0.8×	389 0.7×	355 0.8×	288 0.8×	128 0.4×	74	1.7k
Kim Wolff United Kingdom	28	553 0.6×	296 0.5×	503 1.1×	242 0.7×	537 1.7×	120	2.4k
Amira Guirguis United Kingdom	25	544 0.5×	523 0.9×	295 0.7×	298 0.8×	233 0.7×	77	1.7k
Fredrik C. Kugelberg Sweden	28	977 1.0×	239 0.4×	360 0.8×	345 0.9×	200 0.6×	68	1.9k
Rodney J. Irvine Australia	22	587 0.6×	302 0.5×	309 0.7×	559 1.5×	377 1.2×	36	2.0k
Alex J. Krotulski United States	27	1.3k 1.3×	388 0.7×	455 1.0×	450 1.2×	443 1.4×	99	1.8k
Anita Holmgren Sweden	26	849 0.8×	219 0.4×	366 0.8×	153 0.4×	235 0.7×	45	1.4k
George Behonick United States	14	650 0.6×	238 0.4×	359 0.8×	191 0.5×	270 0.8×	22	1.0k
Shaun L. Greene Australia	22	640 0.6×	328 0.6×	255 0.6×	197 0.5×	208 0.6×	86	1.5k

Countries citing papers authored by Roumen Sedefov

Since Specialization

Citations

This map shows the geographic impact of Roumen Sedefov'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 Roumen Sedefov with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roumen Sedefov more than expected).

Fields of papers citing papers by Roumen Sedefov

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roumen Sedefov. 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 Roumen Sedefov. The network helps show where Roumen Sedefov may publish in the future.

Co-authorship network of co-authors of Roumen Sedefov

This figure shows the co-authorship network connecting the top 25 collaborators of Roumen Sedefov. A scholar is included among the top collaborators of Roumen Sedefov 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 Roumen Sedefov. Roumen Sedefov 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

Brandt, Simon D., et al.. (2025). Update from the EU Early Warning System on new psychoactive substances. Annales de Toxicologie Analytique. 37(1). S22–S22. 1 indexed citations

Freeman, Tom P., Sam Craft, Marta Di Forti, et al.. (2024). Applying machine learning to international drug monitoring: classifying cannabis resin collected in Europe using cannabinoid concentrations. European Archives of Psychiatry and Clinical Neuroscience. 275(2). 421–429. 1 indexed citations

Evans‐Brown, Michael, Ana Gallegos, Rachel Christie, et al.. (2024). Recreational Use of Nitrous Oxide – a Growing Concern in Europe. SHILAP Revista de lepidopterología. 4. 100085–100085. 5 indexed citations

Groshkova, Teodora, Marieke Liem, Andrew Cunningham, Roumen Sedefov, & Paul Griffiths. (2021). Drug-related violence: Will COVID-19 drive better data for safer and more secure EU?. International Journal of Drug Policy. 93. 103143–103143. 1 indexed citations

Jorge, Rodrigo, et al.. (2020). EMCDDA technical report on the new psychoactive substance methyl 2-{[1-(4-fluorobutyl)-1H-indole-3-carbonyl]amino}-3,3-dimethylbutanoate (4F-MDMB-BICA).. Liverpool John Moores University. 4 indexed citations

Groshkova, Teodora, et al.. (2020). Will the Current COVID-19 Pandemic Impact on Long-term Cannabis Buying Practices?. Journal of Addiction Medicine. 14(4). e13–e14. 39 indexed citations

Freeman, Tom P., Teodora Groshkova, Andrew Cunningham, et al.. (2018). Increasing potency and price of cannabis in Europe, 2006–16. Addiction. 114(6). 1015–1023. 83 indexed citations

Evans‐Brown, Michael & Roumen Sedefov. (2018). Responding to New Psychoactive Substances in the European Union: Early Warning, Risk Assessment, and Control Measures. Handbook of experimental pharmacology. 252. 3–49. 30 indexed citations

Groshkova, Teodora, et al.. (2018). Drug affordability–potential tool for comparing illicit drug markets. International Journal of Drug Policy. 56. 187–196. 5 indexed citations

10.

Singleton, Nicola, Andrew Cunningham, Teodora Groshkova, Luis Royuela, & Roumen Sedefov. (2018). Drug supply indicators: Pitfalls and possibilities for improvements to assist comparative analysis. International Journal of Drug Policy. 56. 131–136. 10 indexed citations

11.

Dines, Alison M., David M. Wood, Miguel Galícia, et al.. (2015). Presentations to the Emergency Department Following Cannabis use—a Multi-Centre Case Series from Ten European Countries. Journal of Medical Toxicology. 11(4). 415–421. 49 indexed citations

12.

Dines, Alison M., David M. Wood, Chris Yates, et al.. (2015). Acute recreational drug and new psychoactive substance toxicity in Europe: 12 months data collection from the European Drug Emergencies Network (Euro-DEN). Clinical Toxicology. 53(9). 893–900. 94 indexed citations

13.

Hovda, Knut Erik, Isabelle Giraudon, Chris Yates, et al.. (2014). Current European data collection on emergency department presentations with acute recreational drug toxicity: Gaps and national variations. Clinical Toxicology. 52(10). 1005–1012. 34 indexed citations

14.

Fauzi, Fazlin Mohd, Alexios Koutsoukas, Andrew Cunningham, et al.. (2013). Computer‐aided (in silico) approaches in the mode‐of‐action analysis and safety assessment of Ostarine and 4‐methylamphetamine. Human Psychopharmacology Clinical and Experimental. 28(4). 365–378. 2 indexed citations

15.

Sedefov, Roumen, et al.. (2012). Misuse of Medicines in the European Union: A Systematic Review of the Literature. European Addiction Research. 18(5). 228–245. 204 indexed citations

16.

Sedefov, Roumen, et al.. (2011). Report on the risk assessment of mephedrone in the framework of the Council Decision on new psychoactive substances.. Office for Official Publications of the European Communities eBooks. 70 indexed citations

17.

Dargan, Paul I., Roumen Sedefov, Ana Gallegos, & David M. Wood. (2011). The pharmacology and toxicology of the synthetic cathinone mephedrone (4‐methylmethcathinone). Drug Testing and Analysis. 3(7-8). 454–463. 107 indexed citations

18.

Olszewski, Deborah I., et al.. (2010). Legal Highs on the Internet. Substance Use & Misuse. 45(3). 330–340. 146 indexed citations

19.

Griffiths, Paul, Dominique Lopez, Roumen Sedefov, et al.. (2010). Khat use and monitoring drug use in Europe: The current situation and issues for the future. Journal of Ethnopharmacology. 132(3). 578–583. 72 indexed citations

20.

King, Leslie A. & Roumen Sedefov. (2007). Early-warning system on new psychoactive substances: operating guidelines.. Office for Official Publications of the European Communities eBooks. 22 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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