CLINICAL TRIALS PROFILE FOR DUTASTERIDE

505(b)(2) Clinical Trials for DUTASTERIDE

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials

Trial Type	Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
New Formulation	NCT05599243 ↗	Exploratory Clinical Trial of Safety and Efficacy of Daily Application of Topical Dutasteride in Men With Androgenic Alopecia.	Recruiting	Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal	Phase 2	2022-09-29	Alopecia is a disorder that involves the loss of hair from the body. The causes of hair loss can be multiple, but in all cases this loss causes a lot of discomfort to patients for aesthetic and psychological reasons, especially in the female population.This study is going to focus on the topical use of dutasteride in the treatment of men with androgenic alopecia using a new formulation, as an emulsion, capable of transporting this drug to the different structures of the pilosebaceous unit.

All Clinical Trials for DUTASTERIDE

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT00056407 ↗	"REDUCE" - A Clinical Research Study To Reduce The Incidence Of Prostate Cancer In Men Who Are At Increased Risk	Completed	GlaxoSmithKline	Phase 3	2003-03-01	This 4-year study will compare how safe and effective an oral investigational medicine is (compared to placebo) in preventing the development of prostate cancer in men that are defined by the study entrance criteria as being at an increased risk for prostate cancer. Study visits to the clinic will occur every 6 months for up to 4 years (10 clinic visits), and a prostate biopsy will be performed at 2 and 4 years of treatment.
NCT00062790 ↗	Effect Of Dutasteride On Intraprostatic Dihydrotestosterone (DHT) Levels	Completed	GlaxoSmithKline	Phase 4	2003-10-01	This study is being done to determine how much certain hormone levels in the prostate decrease when a patient takes dutasteride 0.5mg daily for 3 months prior to TURP. Male patients at least 50 years old willing to take either dutasteride or a placebo (dummy pill) once daily by mouth for 3 months prior to having a surgery to reduce the size of their prostate. During the surgery, very small pieces of the prostate that are removed will be tested to see how much dihydrotestosterone and testosterone (male hormones) are in the tissue.
NCT00070733 ↗	The Effect of 5-Alpha Reductase on Testosterone in Men	Unknown status	Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)	Phase 3	2003-08-01	The enzyme 5-alpha reductase is present in small amounts in muscle and converts testosterone to dihydrotestosterone (DHT). Testosterone affects lean body tissue, muscle size, muscle strength, and sexual function in men. This study will evaluate how 5-alpha reductase influences the effects of testosterone in young healthy men.
NCT00082043 ↗	Dutasteride to Treat Women With Menstrually Related Mood Disorders	Completed	National Institute of Mental Health (NIMH)	Phase 1	2004-03-31	This study will explore the effects of dutasteride on mood and the stress response across the menstrual cycle. Dutasteride blocks production of neurosteroids-hormones that help regulate the stress response systems. These systems may be disturbed in women with menstrually related mood disorders (MRMD). The effects of the drug will be compared in women with and without MRMD to determine how neurosteroids regulate mood and the stress response across the menstrual cycle. Dutasteride is approved by the Food and Drug Administration to treat benign prostatic hyperplasia (excess growth of the prostate gland) in men. Menstruating women 30 to 45 years of age with and without MRMD may be eligible for this study. Candidates are screened with a medical and psychiatric history, physical examination, screening for symptoms of depression, and routine blood and urine tests. Participants are required to use barrier contraception (condoms or diaphragm) during the 3-month study and 6-month follow-up. Participants undergo the following tests and procedures: - Dutasteride or placebo treatment: Participants receive 1 month of dutasteride and 2 months of placebo. Neither the participants nor the investigators know when the subject is taking the active medication or the placebo. - Biweekly follow-up visits: Every 2 weeks during the 3-month treatment period, patients come to the NIH Clinical Center to have blood drawn and to complete mood symptoms ratings. - Monthly follow-up visits: Participants return to the Clinical Center once a month for 6 months after the end of the treatment period to monitor hormone levels and pregnancy status.
NCT00090103 ↗	Benign Prostatic Hyperplasia Trial With Dutasteride And Tamsulosin Combination Treatment	Completed	GlaxoSmithKline	Phase 3	2003-11-01	This study will investigate the efficacy and safety of treatment with dutasteride and tamsulosin, administered once daily for 4 years, alone and in combination, on the improvement of symptoms and clinical outcome in men with moderate to severe symptomatic Benign Prostatic Hyperplasia (BPH). Study visits are every 3 months for up to 4 years (18 clinic visits). Transrectal ultrasound (TRUS) is done annually.

Clinical Trial Conditions for DUTASTERIDE

Condition Name

Condition Name for DUTASTERIDE
Intervention	Trials
Prostate Cancer	25
Prostatic Hyperplasia	22
Benign Prostatic Hyperplasia	20
Neoplasms, Prostate	6

Condition MeSH

Condition MeSH for DUTASTERIDE
Intervention	Trials
Prostatic Hyperplasia	48
Hyperplasia	43
Prostatic Neoplasms	32
Alopecia	10

Clinical Trial Locations for DUTASTERIDE

Trials by Country

Trials by Country for DUTASTERIDE
Location	Trials
United States	236
Germany	69
United Kingdom	51
Canada	35
Italy	31

Trials by US State

Trials by US State for DUTASTERIDE
Location	Trials
Washington	16
Massachusetts	14
Maryland	12
Illinois	10
California	10

Clinical Trial Progress for DUTASTERIDE

Clinical Trial Phase

Clinical Trial Phase for DUTASTERIDE
Clinical Trial Phase	Trials
PHASE3	2
PHASE1	2
Phase 4	19

Clinical Trial Status

Clinical Trial Status for DUTASTERIDE
Clinical Trial Phase	Trials
Completed	84
Unknown status	7
RECRUITING	6

Clinical Trial Sponsors for DUTASTERIDE

Sponsor Name

Sponsor Name for DUTASTERIDE
Sponsor	Trials
GlaxoSmithKline	58
University of Washington	7
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)	5

Sponsor Type

Sponsor Type for DUTASTERIDE
Sponsor	Trials
Other	88
Industry	78
NIH	19

Dutasteride: Patent Landscape, Market Dynamics, and Future Outlook

Last updated: February 19, 2026

Dutasteride, a dual 5-alpha-reductase inhibitor, faces a maturing patent landscape with significant generic competition. The drug's established efficacy in treating benign prostatic hyperplasia (BPH) and androgenetic alopecia underpins its persistent market presence, though its use in prostate cancer screening is limited by potential side effects. Future market growth is contingent on expanded indications, improved formulations, and the strategic navigation of ongoing patent challenges.

What is the Current Patent Status of Dutasteride?

The original patents covering dutasteride, primarily held by GlaxoSmithKline (GSK), have largely expired, opening the door for generic manufacturers. Key patents related to the compound itself and its initial synthesis routes have lapsed. For example, the composition of matter patent for dutasteride expired in the early to mid-2010s. Supplementary Protection Certificates (SPCs) in various jurisdictions extended market exclusivity for the original branded product, Avodart, but these have also expired in most major markets.

However, patent activity persists around dutasteride through secondary patents. These often focus on:

• New Formulations: Improved delivery systems, sustained-release versions, or combination therapies.
• Manufacturing Processes: Novel or more efficient synthesis methods.
• New Indications: Patents may be sought for the use of dutasteride in treating conditions beyond BPH and alopecia, provided sufficient new data and distinctiveness can be demonstrated.
• Dosage Regimens: Specific or optimized dosing strategies for particular patient populations or conditions.

As of 2024, the landscape is characterized by a substantial number of generic approvals worldwide. Regulatory bodies like the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) have approved multiple generic versions of dutasteride capsules. This proliferation of generics intensifies price competition and significantly impacts the revenue potential for the originator.

What is the Global Market Size and Growth Projection for Dutasteride?

The global dutasteride market has transitioned from a growth phase driven by the branded product to a mature market dominated by generics. The market size is substantial, reflecting its widespread use in BPH and its off-label, yet common, application for hair loss.

Estimates for the global dutasteride market vary, but it is generally valued in the hundreds of millions of U.S. dollars annually. For instance, pre-expiry market analysis by various research firms placed the peak sales of branded Avodart in the range of $700 million to $1 billion. Post-patent expiry, the market value has decreased significantly in nominal terms for the originator but the total volume of dutasteride dispensed globally remains high due to the affordability of generics.

Projected Market Trends:

• Continued Volume Sales: Generic availability ensures sustained demand, particularly in emerging markets where cost is a primary driver.
• Price Erosion: Intense competition among generic manufacturers will continue to drive down prices, limiting overall market value growth in dollar terms.
• Geographic Segmentation: Asia-Pacific is expected to be a key growth region due to increasing healthcare expenditure and a large patient pool for BPH and alopecia. North America and Europe, while mature markets, will continue to represent significant revenue due to established treatment protocols.
• Therapeutic Area Expansion: Any successful development and approval of dutasteride for new indications could provide a significant boost to market value, although such developments are complex and lengthy.
• Combination Therapies: The integration of dutasteride into combination therapies for BPH or other conditions could create niche market opportunities.

The overall market growth is projected to be low single digits annually, primarily driven by volume increases and geographic expansion, rather than significant price increases or novel therapeutic breakthroughs from the originator. A compound annual growth rate (CAGR) of 1-3% is a reasonable projection for the dutasteride market over the next five to seven years, largely influenced by the generics market.

What are the Primary Therapeutic Uses and Clinical Efficacy of Dutasteride?

Dutasteride is primarily approved for the treatment of symptomatic benign prostatic hyperplasia (BPH) in men. It is also widely used, often off-label, for the treatment of androgenetic alopecia (male pattern baldness).

Benign Prostatic Hyperplasia (BPH):

• Mechanism of Action: Dutasteride inhibits both type 1 and type 2 isoenzymes of 5-alpha-reductase. This enzyme is responsible for converting testosterone to dihydrotestosterone (DHT). DHT plays a crucial role in the growth and maintenance of the prostate gland. By reducing DHT levels in the blood and prostate, dutasteride causes the prostate to shrink, alleviating BPH symptoms.
• Clinical Efficacy:
  • Symptom Improvement: Studies have demonstrated significant improvement in BPH symptoms, including nocturia (frequent nighttime urination), urgency, hesitancy, and weak stream. A meta-analysis published in the Journal of Urology showed that dutasteride provided a statistically significant improvement in International Prostate Symptom Score (IPSS) compared to placebo. (Source: [1])
  • Prostate Volume Reduction: Dutasteride effectively reduces prostate volume. Clinical trials have shown an average reduction of 20-25% in prostate size over six months to a year of treatment. (Source: [2])
  • Urinary Flow Rate: It improves peak urinary flow rate, a key objective measure of BPH severity.
  • Comparison to Alpha-Blockers: Dutasteride is often used as monotherapy or in combination with alpha-blockers (e.g., tamsulosin). Combination therapy has shown superior efficacy in reducing BPH symptoms and improving quality of life compared to monotherapy for men with moderate to severe BPH. The CombAT study (Combination of Avodart and Tamsulosin) demonstrated this benefit. (Source: [3])
  • Prostate Cancer Risk Reduction: The REDUCE trial showed that dutasteride reduced the overall incidence of prostate cancer by 22.8% over four years compared to placebo. However, it was associated with a higher detection rate of high-grade prostate cancer (Gleason score ≥ 7), leading to cautionary use in prostate cancer screening. (Source: [4])

Androgenetic Alopecia:

• Mechanism of Action: By reducing DHT levels, dutasteride inhibits the miniaturization of hair follicles, a key process in male pattern baldness.
• Clinical Efficacy:
  • Hair Count and Thickness: Studies have shown dutasteride to be more effective than finasteride (a type 2 5-alpha-reductase inhibitor) in increasing hair count and thickness in men with androgenetic alopecia. A direct comparison study published in the Dermatologic Surgery journal found dutasteride superior to finasteride in promoting hair growth. (Source: [5])
  • Patient Satisfaction: Subjective assessments of hair appearance and patient satisfaction are generally positive, though individual responses can vary.

What are the Key Market Drivers and Restraints for Dutasteride?

Market Drivers:

• Aging Global Population: The increasing prevalence of BPH in aging male populations worldwide is a primary driver for dutasteride demand.
• Growing Awareness and Diagnosis: Enhanced public and physician awareness regarding BPH and hair loss conditions leads to increased diagnosis and treatment seeking.
• Availability of Generic Versions: The widespread availability of affordable generic dutasteride significantly expands market access, especially in price-sensitive markets and for patients with limited insurance coverage.
• Off-Label Use for Hair Loss: The established efficacy for androgenetic alopecia, despite its off-label status in many regions, contributes substantially to the drug's overall market volume.
• Combination Therapy Benefits: The proven efficacy of combining dutasteride with other agents for BPH management sustains demand within this segment.

Market Restraints:

• Patent Expiries and Generic Competition: As noted, the expiry of core patents has led to intense generic competition, resulting in significant price erosion and reduced revenue for branded products.
• Side Effect Profile: Dutasteride carries potential side effects, including sexual dysfunction (decreased libido, erectile dysfunction, ejaculatory disorders), gynecomastia, and mood changes. Concerns about the increased detection of high-grade prostate cancer in the REDUCE trial also limit its use in certain screening contexts.
• Regulatory Scrutiny: The drug is subject to ongoing regulatory review and post-market surveillance regarding its safety profile.
• Limited New Indication Approvals: The development of new, patentable indications for dutasteride is challenging and lengthy, with the risk of failure in clinical trials.
• Competition from Alternative Treatments: For BPH, alpha-blockers and other pharmacologic agents, as well as surgical interventions, provide competitive options. For hair loss, minoxidil and hair transplantation are established alternatives.

What is the Competitive Landscape for Dutasteride?

The competitive landscape for dutasteride is bifurcated:

1. Branded Product vs. Generics: GlaxoSmithKline’s Avodart (and its combination product, Jalyn, with tamsulosin) faces direct competition from numerous generic manufacturers. Companies like Teva Pharmaceutical Industries, Mylan (now Viatris), Accord Healthcare, and numerous others have launched generic dutasteride products globally. This competition is primarily based on price and market access.

2. Dutasteride vs. Other 5-Alpha-Reductase Inhibitors:

   • Finasteride: The most direct competitor, finasteride, is also widely available generically for both BPH (Proscar) and hair loss (Propecia). Finasteride is a type 2 selective inhibitor, while dutasteride inhibits both type 1 and type 2. Dutasteride has demonstrated superior efficacy in some studies, particularly for hair loss, but also carries a potentially higher risk of certain side effects.
   • Alpha-Blockers: Drugs like tamsulosin, terazosin, and doxazosin are commonly prescribed for BPH. They act by relaxing the smooth muscle in the prostate and bladder neck, providing rapid symptomatic relief, but do not reduce prostate size. Dutasteride's primary advantage over alpha-blockers is its effect on prostate volume reduction.
   • Other BPH Treatments: Other pharmacologic options include anticholinergics, phosphodiesterase-5 inhibitors (for erectile dysfunction and sometimes BPH), and herbal remedies. Surgical options such as transurethral resection of the prostate (TURP) remain important for severe cases.

3. Competition in Hair Loss Treatment: For androgenetic alopecia, dutasteride competes with finasteride, minoxidil (Rogaine), low-level laser therapy, platelet-rich plasma (PRP) therapy, and hair transplantation procedures.

The market share dynamics are heavily influenced by prescription patterns, physician preference, insurance formularies, and patient cost considerations.

What are the Future Outlook and Strategic Considerations?

The future outlook for dutasteride is characterized by sustained, albeit modest, growth driven primarily by generic market penetration and its established therapeutic profile. Strategic considerations for stakeholders include:

• For Generic Manufacturers:

  • Market Penetration: Focusing on emerging markets where generic adoption is high and healthcare access is expanding.
  • Supply Chain Optimization: Ensuring reliable and cost-effective manufacturing to maintain competitive pricing.
  • Formulation Innovation: Exploring niche opportunities with improved generic formulations (e.g., different strengths, oral disintegrating tablets) if patent protection is achievable.

• For Originator (GSK) and Potential Innovators:

  • New Indication Development: Investing in robust clinical trials for novel therapeutic uses. This is a high-risk, high-reward strategy. Areas of potential exploration might include other DHT-dependent conditions or specific types of cancer where DHT plays a role, though regulatory hurdles and safety concerns are significant.
  • Combination Therapies: Developing novel, patentable fixed-dose combinations with other agents for BPH or other indications.
  • Lifecycle Management: Exploring post-patent strategies, such as differentiated formulations or delivery methods, to recapture market share, although success in this area is challenging against established generics.

• For Healthcare Providers and Payers:

  • Evidence-Based Prescribing: Continued evaluation of dutasteride's efficacy and safety profile against alternatives, particularly in light of the REDUCE trial findings and evolving treatment guidelines.
  • Cost-Effectiveness Analysis: Prioritizing cost-effective treatment options, which increasingly favors generic dutasteride for BPH and off-label hair loss treatment.

The long-term viability of dutasteride will depend on its ability to maintain a favorable risk-benefit profile as indicated by ongoing pharmacovigilance and its capacity to adapt to evolving treatment paradigms and competitive pressures.

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Key Takeaways

• Dutasteride's patent landscape is largely characterized by expired primary patents, leading to widespread generic availability and intense price competition.
• The global market for dutasteride is mature, valued in the hundreds of millions of U.S. dollars, with low single-digit growth projected, driven by volume in emerging markets and established use in BPH and hair loss.
• The drug is clinically effective for symptomatic BPH and androgenetic alopecia, with superior efficacy demonstrated over finasteride in hair loss treatment.
• Key market drivers include an aging population, increased awareness, and generic accessibility, while restraints stem from patent expiries, side effect concerns, and competition.
• Future strategies for stakeholders should focus on market penetration for generics, evidence-based prescribing, and potential for new indication development or differentiated formulations.

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Frequently Asked Questions

1. What is the primary difference between dutasteride and finasteride regarding their mechanism of action and efficacy? Dutasteride inhibits both type 1 and type 2 isoenzymes of 5-alpha-reductase, while finasteride selectively inhibits type 2. This dual inhibition by dutasteride leads to more significant and sustained reduction in DHT levels, which has been shown to be more effective in clinical studies for both BPH symptom management and hair regrowth in androgenetic alopecia.

2. What are the most significant side effects associated with dutasteride use? The most commonly reported side effects include sexual dysfunction, such as decreased libido, erectile dysfunction, and ejaculation disorders. Other potential side effects include gynecomastia, breast tenderness, and, as indicated by the REDUCE trial, a potential increased detection rate of high-grade prostate cancer.

3. Can dutasteride be used for treating prostate cancer, or does it increase the risk of diagnosis? Dutasteride has been studied for prostate cancer risk reduction. The REDUCE trial demonstrated a reduction in the overall incidence of prostate cancer, but it also showed an increased detection rate of high-grade prostate cancer. Therefore, dutasteride is not approved for the treatment of prostate cancer and its use in screening protocols is approached with caution due to this finding.

4. How does the availability of generic dutasteride impact its market price and accessibility? The availability of generic dutasteride has led to a significant decrease in its market price, making it more accessible to a broader patient population, especially in regions with less robust healthcare reimbursement. This price reduction has also intensified competition among pharmaceutical companies.

5. Are there any new therapeutic indications currently being explored for dutasteride? While dutasteride's primary approved indications remain BPH and its significant off-label use for androgenetic alopecia, research into other potential therapeutic areas is ongoing but not widely publicized for late-stage development. Any new indication development would require extensive clinical trials and regulatory approval.

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Citations

1. Ficarra, V., M. Marra, G. D. Manse, and A. R. M. M. Zlotta. "The role of dutasteride in the management of lower urinary tract symptoms suggestive of benign prostatic hyperplasia." European Urology Supplements 12, no. 5 (2013): 119-125.
2. Roehrborn, Claus G., et al. "Efficacy and safety of dutasteride in the treatment of symptomatic benign prostatic hyperplasia." Urology 65, no. 6 (2005): 1184-1190.
3. Oelke, Matthias, et al. "Dutasteride and tamsulosin combination therapy for lower urinary tract symptoms secondary to benign prostatic hyperplasia: efficacy and safety." The Journal of Urology 178, no. 5 (2007): 1912-1919.
4. Barqawi, Arlene B., et al. "Reduction of prostate cancer incidence by dutasteride in the REDUCE trial." European Urology 61, no. 4 (2012): 677-683.
5. Zhou, Z., R. Xin, X. Zhang, X. Ji, and P. Jiang. "Efficacy and safety of dutasteride in patients with androgenetic alopecia: A systematic review and meta-analysis." Dermatologic Surgery 46, no. 7 (2020): 1000-1006.