Effects of letrozole therapy in former users of anabolic steroids: A randomized clinical trial

Jon Jarløv Rasmussen^{1

2}, Yeliz Bulut^{1

3}, Niels Brandt-Jacobsen^{1

4}, Jan Frystyk^{5

6}, Jakob Albrethsen^{7

8}, Mario Thevis⁹, Niels Jørgensen^{7

8}, Morten Schou^{3

10}, Anders Juul^{3

7

8}, Caroline Kistorp^{1

3}

Affiliations

¹ Department of Nephrology and Endocrinology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
² Department of Internal Medicine 1, Holbæk Hospital, Holbæk, Denmark.
³ Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
⁴ Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁵ Department of Endocrinology, Odense University Hospital, Odense, Denmark.
⁶ Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
⁷ Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁸ International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁹ Center for Preventive Doping Research, German Sport University, Cologne, Germany.
¹⁰ Department of Cardiology, Herlev and Gentofte University Hospital, Herlev, Denmark.

Jon Jarløv Rasmussen et al. J Intern Med. 2025 Jan.

. 2025 Jan;297(1):113-116.

doi: 10.1111/joim.20040. Epub 2024 Nov 23.

¹ Department of Nephrology and Endocrinology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
² Department of Internal Medicine 1, Holbæk Hospital, Holbæk, Denmark.
³ Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
⁴ Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁵ Department of Endocrinology, Odense University Hospital, Odense, Denmark.
⁶ Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
⁷ Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁸ International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
⁹ Center for Preventive Doping Research, German Sport University, Cologne, Germany.
¹⁰ Department of Cardiology, Herlev and Gentofte University Hospital, Herlev, Denmark.

No abstract available

Keywords: abuse; anabolic steroids; infertility; letrozole; male hypogonadism; testosterone.

Publication types