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Which countries have the most top-cited scientists in Substance Abuse?

389 researchers whose main subfield is Substance Abuse are in the 2026 list of top-cited scientists, the annual ranking often called the Stanford–Elsevier top 2% scientists list. The United States has the most (248, 63.8%), followed by Australia (50) and the United Kingdom (33). A country with 100 or more opens its institutions in the subfield; the others open their scientists in the table of all authors.

#	Country	Listed authors	Top 100k	Share of subfield	Highest-ranked author	Top institution
1	United States	248	126	63.8%	Sinha, Rajita #1,910	Yale School of Medicine
2	Australia	50	27	12.9%	Degenhardt, Louisa J. #1,790	National Drug and Alcohol Research Centre
3	United Kingdom	33	18	8.5%	Griffiths, Mark D. #139	King's College London
4	Canada	23	13	5.9%	Rehm, Jurgen T. #550	University of Toronto
5	Norway	4	2	1.0%	Andreassen, Cecilie Schou #6,858	Universitetet i Bergen
6	Netherlands	4	3	1.0%	Wiers, Reinout W.H.J. #34,607	Universiteit van Amsterdam
7	Sweden	3	2	0.8%	Room, Robin G.W. #7,249	Stockholms universitet
8	New Zealand	3	1	0.8%	Fischer, Benedikt #31,363	University of Auckland
9	Germany	3	3	0.8%	Manthey, Jakob #40,184	Universitätsklinikum Leipzig und Medizinische Fakultät
10	Ireland	2	1	0.5%	Van Hout, Marie Claire #66,293	South East Technological University
11	Israel	2	0	0.5%	Efrati, Yaniv #123,449	Bar-Ilan University
12	Finland	1	1	0.3%	Oksanen, Atte #27,035	Tampere University
13	South Africa	1	1	0.3%	Parry, Charles D.H. #42,193	South African Medical Research Council
14	Switzerland	1	1	0.3%	Etter, Jean François #62,593	L'Institut de Santé Globale, Genève
15	Iran	1	1	0.3%	Armoon, Bahram #69,995	Saveh University of Medical Sciences
16	Italy	1	1	0.3%	Buscema, Paolo Massimo #71,520	Semeion centro ricerche di scienze della communicazione
17	Greece	1	1	0.3%	Farsalinos, Konstantinos #83,664	University of Patras
18	Türkiye	1	1	0.3%	Kircaburun, Kağan #94,056	Düzce Üniversitesi
19	Mexico	1	1	0.3%	Anderson, Peter #98,631	Public Health Consultant. Hellerup
20	Peru	1	0	0.3%	Anthony, J. C. #110,963	Universidad Peruana Cayetano Heredia
21	Spain	1	0	0.3%	Carbonell, Xavier #113,513	Universitat Ramon Llull
22	Belgium	1	0	0.3%	Maurage, Pierre #116,130	UCLouvain
23	Macao	1	0	0.3%	Wu, Anise Man Sze #123,444	University of Macau
24	Japan	1	0	0.3%	Higuchi, Susumu #143,582	National Hospital Organization Kurihama Medical and Addiction Center
25	Hong Kong	1	0	0.3%	Xiao, Leon Y. #224,564	City University of Hong Kong