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The T Files Editorial Team

August 19, 2025

7 min read

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THE T FILES — SERIES 7 · POST 3

The ISSWSH and FDA Standoff

After 36 randomized controlled trials in 8,000+ women, the FDA rejected the only testosterone product designed for women — citing long-term safety…

In 2019, a group of international experts in women’s sexual health gathered their evidence and published a Global Consensus Position Statement on the use of testosterone therapy for women. The statement, published simultaneously in multiple major journals including the BMJ, represented the consensus of four major international societies — including the International Society for the Study of Women’s Sexual Health (ISSWSH) — and concluded, in plain language, that testosterone therapy is “recommended for postmenopausal women with hypoactive sexual desire disorder (HSDD).”

The evidence, they said, supported its use. The benefits for libido were documented. The safety profile at physiologic doses appeared acceptable.

The FDA, meanwhile, has never approved a single testosterone product specifically for use in women in the United States. Not one.

This is what a standoff looks like in clinical medicine.

What HSDD Is, and Why It Matters

Hypoactive sexual desire disorder is the clinical term for persistent, distressing low sexual desire that is not explained by a relationship problem, a psychiatric condition, another medical condition, or a medication side effect. The “distressing” qualifier is important — reduced desire by itself is not a disorder, but reduced desire that meaningfully degrades a woman’s quality of life and sense of self is a legitimate clinical complaint.

HSDD is remarkably common. Studies have consistently found that 8–16% of premenopausal women and up to 30–40% of postmenopausal women report low sexual desire with associated distress. It is, by prevalence, one of the most common sexual dysfunction complaints in clinical practice.

The biological connection to testosterone is well-established. The hypothalamus and limbic system — the brain regions central to sexual motivation — are richly supplied with androgen receptors. Testosterone at normal female physiologic concentrations modulates the activity of dopaminergic circuits that underlie desire and anticipation. When testosterone falls significantly below an individual’s functional range, those circuits function differently. The clinical result is the symptom complex described as HSDD.

This is not a novel observation. It was being published in peer-reviewed literature decades before ISSWSH wrote its consensus statement. The 2019 position paper was a consolidation of evidence that had been accumulating since at least the early 1990s.

What the Consensus Statement Actually Says

The 2019 Global Consensus Position Statement, published in The Journal of Sexual Medicine, Climacteric, the BMJ, and several other journals simultaneously, drew on a systematic review and meta-analysis of 36 controlled trials involving more than 8,000 women.

The statement’s key conclusions:

  • Testosterone is the only treatment specifically shown to improve low sexual desire with associated distress in postmenopausal women.
  • There is no evidence that testosterone therapy at doses targeting premenopausal physiologic concentrations increases the risk of serious adverse events, including cardiovascular events or breast cancer.
  • The existing evidence supports transdermal testosterone at doses that achieve serum levels in the physiologic premenopausal range (generally targeting total testosterone of 15–50 ng/dL).
  • Non-oral delivery routes (patches, gels, creams) are preferred because oral testosterone is associated with first-pass hepatic metabolism that alters lipid profiles.

The statement was careful about what it was and was not claiming: it did not endorse supraphysiologic dosing, did not recommend testosterone for premenopausal HSDD (insufficient trial data), and explicitly acknowledged that long-term safety data — particularly for cancer endpoints over 10+ years — remain limited.

That last caveat is important. It is, in fact, the core of the regulatory problem.

Why the FDA Has Not Approved a Product

The FDA’s position is not irrational, even if the consequences for patients are frustrating.

In 2004, the FDA’s Reproductive Health Drugs Advisory Committee reviewed Procter & Gamble’s application for Intrinsa, a 300 mcg/day testosterone patch for surgically menopausal women with HSDD. The committee voted 14 to 7 that the drug was effective. It voted 14 to 3 that long-term safety had not been adequately demonstrated. The agency subsequently declined to approve the application.

The specific safety concerns were:

Cardiovascular risk. Testosterone can affect lipid profiles — in general, it tends to lower HDL ("good") cholesterol to some degree — and the FDA wanted longer-duration data on actual cardiovascular events, not just surrogate markers. The Phase III Intrinsa trials ran 6 months with 12-month extensions. The FDA wanted years.

Breast cancer risk. This is the concern that carries the most emotional weight. The observational data on testosterone and breast cancer risk are genuinely complicated — some studies suggest testosterone is protective, others suggest elevated androgens in postmenopausal women are associated with increased risk, and the mechanisms through which testosterone might influence breast tissue (including its conversion to estradiol via aromatase) are not fully characterized. The FDA, in 2004, viewed the existing evidence as insufficient to rule out long-term risk in a population of postmenopausal women who might use the product for many years.

Market incentive failure. After the FDA declined Intrinsa, Procter & Gamble did not reapply. The pharmaceutical industry’s investment in female testosterone development effectively collapsed. Running a 5-year cardiovascular outcomes trial in tens of thousands of women to satisfy an uncertain regulatory pathway is a multi-hundred-million-dollar undertaking with no guarantee of approval at the end. Companies did the math and chose not to fund it. That business calculus left the clinical evidence base exactly where it was in 2004, and patients without an approved product.

The Off-Label Reality

Without an approved product, women who pursue testosterone therapy in the United States get it through two routes: off-label male products at dramatically reduced doses, or compounded preparations from specialty pharmacies.

Off-label male testosterone gels (typically 1–1.62% concentration) are prescribed at one-tenth to one-twentieth of the standard male dose. A male patient using 50 mg/day of testosterone gel might have a female patient using 2–5 mg/day of the same product. This is pharmacologically reasonable — the hormone is the hormone — but creates dosing imprecision because the male-formulated products are not calibrated for female ranges.

Compounded testosterone preparations — custom-made creams, gels, or other delivery forms from compounding pharmacies — offer flexibility in concentration and dose but lack the manufacturing standardization of FDA-approved products. Quality varies across compounding pharmacies, and absorption rates can be inconsistent. The ISSWSH consensus statement acknowledges compounded preparations as a practical reality while noting the regulatory and quality limitations.

For a product specifically designed for women’s testosterone ranges — calibrated, consistent, delivered in an appropriate concentration — there is simply nothing FDA-approved on the US market. This is the gap.

The Regulatory vs. Clinical Divide

What makes the current situation genuinely odd is that the clinical consensus and the regulatory reality have diverged substantially.

A physician who reads the 2019 ISSWSH Global Consensus Statement, reviews the supporting meta-analysis, and concludes that testosterone therapy is appropriate for their postmenopausal patient with documented HSDD is acting in alignment with the evidence. A regulatory framework that has no approved product for that indication is, in a meaningful sense, behind the evidence.

This is not unique to testosterone. The FDA approves products, not clinical practices, and the clinical evidence for a given practice can substantially outpace the regulatory environment — particularly when pharmaceutical investment in seeking approval has dried up.

The result is that women who need testosterone therapy for documented HSDD must rely on physicians who are comfortable operating off-label, pharmacies capable of compounding appropriate preparations, and patients who are willing to navigate a system that was not designed to serve them.

That is a suboptimal situation. Everyone in the relevant professional societies agrees on this. The solution — large-scale, long-term safety trials that would satisfy the FDA — requires pharmaceutical investment that is not currently arriving.

Next up: Post 4 — Dosing Women Differently: why women require doses roughly 1/10 to 1/20 of male protocols, how dose calibration works in practice, and what careful monitoring looks like.


Expand any question for the full answer.

What exactly did the 2019 ISSWSH Global Consensus Statement conclude about testosterone for women?

The 2019 Global Consensus Position Statement, published simultaneously in the BMJ and several other major journals by four international professional societies including ISSWSH, drew on a systematic review of 36 controlled trials involving more than 8,000 women. It concluded that testosterone is the only treatment specifically shown to improve hypoactive sexual desire disorder (HSDD) in postmenopausal women, that there is no evidence testosterone at physiologic doses increases the risk of serious adverse events including cardiovascular events or breast cancer, and that non-oral transdermal delivery routes are preferred. The statement explicitly recommended testosterone for postmenopausal women with documented HSDD.

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What is HSDD, and how common is it?

Hypoactive sexual desire disorder is the clinical term for persistent, distressing low sexual desire not explained by relationship problems, psychiatric conditions, other medical conditions, or medication side effects — the 'distressing' qualifier is essential, because reduced desire alone is not a disorder, but reduced desire that meaningfully degrades a woman's quality of life is a legitimate clinical complaint. Studies consistently find that 8–16% of premenopausal women and up to 30–40% of postmenopausal women report low sexual desire with associated distress, making it one of the most common sexual dysfunction complaints in clinical practice. The biological connection to testosterone is well-established, rooted in androgen receptors in the hypothalamus and limbic system that modulate desire-related dopaminergic circuits.

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Why did the FDA decline to approve Intrinsa even after the advisory committee voted it was effective?

In 2004, the FDA's Reproductive Health Drugs Advisory Committee voted 14 to 7 that Intrinsa, a testosterone patch for surgically menopausal women, was effective — but voted 14 to 3 that long-term safety had not been adequately demonstrated. The specific concerns were insufficient long-term data on cardiovascular events beyond the 6–12 month trial durations, and unresolved questions about breast cancer risk given testosterone's conversion to estradiol via aromatase in breast tissue. The FDA's position is not entirely irrational, but the consequence — no approved product for a well-documented condition — has real costs for patients who needed it.

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Why did pharmaceutical companies stop pursuing FDA approval for a women's testosterone product?

After the FDA declined Intrinsa in 2004, Procter & Gamble chose not to reapply, and other companies largely followed by exiting the space. Running the 5-year cardiovascular outcomes trial that would satisfy the FDA's safety requirements is a multi-hundred-million-dollar undertaking with no guaranteed approval at the end — a business calculation that pharmaceutical companies made and walked away from. The result is that the evidence base has been frozen essentially where it was in 2004, and patients have been left without an approved product not because the clinical evidence failed them, but because the commercial economics did.

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How do women currently access testosterone therapy in the United States without an FDA-approved product?

Women in the United States access testosterone through two routes: off-label use of male-formulated testosterone gels at dramatically reduced doses (typically one-tenth to one-twentieth of a standard male dose), or compounded preparations from specialty pharmacies that can prepare testosterone in concentrations calibrated for the female range. Both approaches have real limitations — male-formulated products are not calibrated for female dosing precision, and compounded preparations vary in quality and absorption consistency across pharmacies. The ISSWSH consensus statement acknowledges compounded preparations as a practical reality while noting these regulatory and quality constraints.

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Is low-dose testosterone therapy actually available for women today, and what does it look like?

Yes — despite the absence of an FDA-approved product in the United States, compounded low-dose testosterone is widely used clinically for women, and purpose-built options are emerging. Keen Meds offers a low-dose testosterone spray via the Hypospray® transdermal platform, formulated specifically for women's physiological dosing range — delivering testosterone transdermally with no injections. Women's dosing is approximately 10 to 20 times lower than men's, and the Keen Meds formulation is calibrated precisely for that range, designed to restore normal female testosterone levels without the dosing imprecision of repurposing male-formulated products.

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FAQ

References

- Davis SR, Baber R, Panay N, et al. "Global Consensus Position Statement on the Use of Testosterone Therapy for Women." *J Sex Med.* 2019;16(9):1331–1337.
- Goldstat R, Briganti E, Tran J, Wolfe R, Davis SR. "Transdermal testosterone therapy improves well-being, mood, and sexual function in premenopausal women." *Menopause.* 2003;10(5):390–398.
- Kingsberg SA, Clayton AH, Pfaus JG. "The female sexual response: current models, neurobiological underpinnings and agents currently approved or under investigation for the treatment of hypoactive sexual desire disorder." *CNS Drugs.* 2015;29(11):915–933.
- Shifren JL, Braunstein GD, Simon JA, et al. "Transdermal testosterone treatment in women with impaired sexual function after oophorectomy." *N Engl J Med.* 2000;343(10):682–688.
- US Food and Drug Administration Advisory Committee Meeting, December 2004. Reproductive Health Drugs Advisory Committee. Intrinsa (testosterone transdermal system) — meeting transcript.

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