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AndroGel and Gynecomastia That Won't Go Away: When to Worry and What to Do

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At a glance

  • Gynecomastia in 180-day gel trial, generic gel 1% label / 1% at 50 mg, 0% at 75 mg, 3% at 100 mg [2]
  • Three-year extension / 2.5% [2]
  • Breast pain in 180-day trial / 1%, 3%, 1% by dose [2]
  • Mechanism / aromatase converts testosterone to estradiol; estrogen stimulates breast tissue [4][3]
  • Medical options in reviews / aromatase inhibitors and tamoxifen [1]
  • Surgery / may be needed when gynecomastia does not resolve [3]

Why AndroGel Can Cause Gynecomastia

Testosterone is converted to estradiol by aromatase [4]. Estrogens stimulate breast tissue growth and androgens inhibit it; most gynecomastia comes from deficient androgen action or excess estrogen action in breast tissue [3]. Raising testosterone also raises estradiol through aromatization [4].

The prescribing information for generic testosterone gel 1% lists gynecomastia as an adverse reaction [2]. In the 180-day controlled trial, gynecomastia was reported by 1% of men taking 50 mg, 0% taking 75 mg, and 3% taking 100 mg [2]. Breast pain was reported by 1%, 3%, and 1% at those doses [2]. In a 3-year extension study of 162 men, gynecomastia was reported in 2.5% [2]. That label gives adverse reaction rates but no time threshold for resolution [2].

When It Does Not Resolve

A 2014 review says surgery to remove enlarged breast tissue might be necessary when gynecomastia does not resolve spontaneously or with medical therapy [3]. The same review notes that male breast cancer is much less common than benign gynecomastia and that the two can usually be distinguished by a careful physical examination [3].

A plastic surgery review that is not specific to testosterone says medical management of gynecomastia has had limited success and that surgical therapy, primarily excisional techniques, has been the accepted standard; the authors' series of 61 patients had an overall success rate of 86.9% with suction-assisted lipectomy or ultrasound-assisted liposuction, with excisional techniques reserved for severe gynecomastia with significant skin excess [6].

Medical Options Described for Testosterone-Related Gynecomastia

A 2025 review says increased estrogen levels and gynecomastia during testosterone replacement are usually managed with aromatase inhibitors and tamoxifen [1]. A 2004 report of two men on testosterone replacement described successful treatment of gynecomastia with the aromatase inhibitor anastrozole [5]. That is a two-patient report, not a randomized trial.

Frequently asked questions

How common is gynecomastia with testosterone gel?
In the generic testosterone gel 1% label's 180-day trial, gynecomastia was reported by 1% of men taking 50 mg, 0% taking 75 mg, and 3% taking 100 mg [2]. In a 3-year extension study of 162 men, 2.5% reported gynecomastia [2].
What medicines are described for testosterone-related gynecomastia?
A 2025 review says increased estrogen levels and gynecomastia are usually managed with aromatase inhibitors and tamoxifen [1]. A report of two men described successful treatment with anastrozole [5].
When is surgery considered?
A 2014 review says surgery to remove enlarged breast tissue might be necessary when gynecomastia does not resolve spontaneously or with medical therapy [3].
Can male breast cancer look like gynecomastia?
The review says male breast cancer is much less common than benign gynecomastia and that the two can usually be distinguished by a careful physical examination [3].
Do the gel rates apply to AndroGel 1.62%?
Not directly. The rates come from the generic testosterone gel 1% label, which states that its dosage and administration differ from testosterone gel 1.62% [2].

References

  1. Basheer B, Ila V, Barros R, Mesquita F, Lopes LS, Lima VFN, et al. Management of Adverse Effects in Testosterone Replacement Therapy. Int Braz J Urol. 2025;51(3). Management of Adverse Effects in Testosterone Replacement Therapy
  2. U.S. National Library of Medicine, DailyMed. Testosterone gel 1% topical (generic) prescribing information, effective 2025-09-30. Testosterone gel 1% topical prescribing information
  3. Narula HS, Carlson HE. Gynaecomastia--pathophysiology, diagnosis and treatment. Nat Rev Endocrinol. 2014;10(11):684-98. Gynaecomastia--pathophysiology, diagnosis and treatment
  4. Cooke PS, Nanjappa MK, Ko C, Prins GS, Hess RA. Estrogens in Male Physiology. Physiol Rev. 2017;97(3):995-1043. Estrogens in Male Physiology
  5. Rhoden EL, Morgentaler A. Treatment of testosterone-induced gynecomastia with the aromatase inhibitor, anastrozole. Int J Impot Res. 2004;16(1):95-7. Treatment of testosterone-induced gynecomastia with the aromatase inhibitor, anastrozole
  6. Rohrich RJ, Ha RY, Kenkel JM, Adams WP. Classification and management of gynecomastia: defining the role of ultrasound-assisted liposuction. Plast Reconstr Surg. 2003. Classification and management of gynecomastia: defining the role of ultrasound-assisted liposuction
Evidence overview for AndroGel and Gynecomastia That Won't Go Away: When to Worry and What to Do