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the claim
Testosterone therapy increases the risk of venous blood clots.
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CONTESTED PARTIAL
Recorded sources
6 sources for · 2 against
Is it true that testosterone therapy increases the risk of venous blood clots?
Partly. Evidence on whether testosterone therapy raises venous clot risk is mixed and partial: several observational and trial reports note higher pulmonary embolism rates or a possible early risk window, while a review and a cohort of women on estradiol plus testosterone report no clear increase. No single source settles the general claim at full strength.
Verdict: CONTESTED PARTIAL · 6 sources for, 2 against · Last checked
Evidence for · 6
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A, N., E, C., V, M., CR, G., CC, M., & F, B. (2026). Does Testosterone Replacement Therapy Increase Risk of Thrombosis After Total Hip or Knee Arthroplasty?. doi.org. https://doi.org/10.1016/j.arth.2025.11.040
Evidence against · 2
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Cardiovascular disease and testosterone therapy in male hypogonadism. (2024). doi.org. https://doi.org/10.1111/nyas.15211
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More for · 5
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Testosterone Therapy as an Isolated Risk Factor for Venous Thrombosis: A Case Report - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.7759/cureus.63611
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Reis, E. T. S. d., Dias, C. M. F., Vieira, C. S., Nadai, M., Okano, S. P., Franceschini, S. A., & Lara, L. A. d. S. (2025). Effect of testosterone on blood-clotting markers in transsexual men. doi.org. https://doi.org/10.1016/j.htct.2025.103862
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L, S., M, M., H, K., M, A., M, P., & A, D. (2026). Testosterone replacement therapy and non‑major adverse cardiovascular event safety signals: Atrial fibrillation, acute kidney injury, and pulmonary embolism.. doi.org. https://doi.org/10.33963/v.phj.111620
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Androgen replacement therapy. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Androgen_replacement_therapy
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Masculinizing hormone therapy. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Masculinizing_hormone_therapy
More against · 1
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A, N., D, R., J, B., M, K., & L, N. (2026). Incidence of venous thromboembolism in women receiving transdermal oestradiol/testosterone with micronised progesterone in accordance with NICE guidelines.. doi.org. https://doi.org/10.21037/tau-2025-662
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