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Last Updated: March 27, 2026

CLINICAL TRIALS PROFILE FOR FORTEO


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All Clinical Trials for FORTEO

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00005006 ↗ Parathyroid Hormone (PTH) With Alendronate for Osteoporosis Completed National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) Phase 2 1987-09-01 This study investigates the effectiveness of parathyroid hormone (PTH) in combination with alendronate, a standard treatment for osteoporosis that blocks or reduces bone loss. We are using alendronate because it may help protect patients against any possible harmful effects of PTH in cortical bone such as the long bones or hip. We are testing two different treatment schedules of PTH-one in which we give PTH daily and one in which we give PTH for 3 out of every 6 months in a cyclical fashion. The entire study is 21 months long; the active treatment period is 18 months with a 6-month followup period. The main effects we will look for in this study are changes in body chemicals that are signs of bone formation or bone breakdown, and changes in bone density throughout the skeleton. We will randomly assign all study participants, who are women aged 50 and over, to either stay on alendronate alone, receive daily continuous PTH plus alendronate, or receive daily PTH for 3 months out of every 6 for a total of three separate 3-month cycles of PTH plus daily alendronate.
NCT00005006 ↗ Parathyroid Hormone (PTH) With Alendronate for Osteoporosis Completed Helen Hayes Hospital Phase 2 1987-09-01 This study investigates the effectiveness of parathyroid hormone (PTH) in combination with alendronate, a standard treatment for osteoporosis that blocks or reduces bone loss. We are using alendronate because it may help protect patients against any possible harmful effects of PTH in cortical bone such as the long bones or hip. We are testing two different treatment schedules of PTH-one in which we give PTH daily and one in which we give PTH for 3 out of every 6 months in a cyclical fashion. The entire study is 21 months long; the active treatment period is 18 months with a 6-month followup period. The main effects we will look for in this study are changes in body chemicals that are signs of bone formation or bone breakdown, and changes in bone density throughout the skeleton. We will randomly assign all study participants, who are women aged 50 and over, to either stay on alendronate alone, receive daily continuous PTH plus alendronate, or receive daily PTH for 3 months out of every 6 for a total of three separate 3-month cycles of PTH plus daily alendronate.
NCT00051558 ↗ Comparison of Teriparatide With Alendronate for Treating Glucocorticoid-Induced Osteoporosis Completed Eli Lilly and Company Phase 3 2002-11-01 Osteoporosis is a condition in which the amount of bone is reduced, the bones are weak, and there is an increased risk for fractures. Glucocorticoids (such as prednisone) are prescribed to treat a large number of conditions such as arthritis and asthma. When taken for several months or longer, glucocorticoids can cause bone loss and lead to a form of osteoporosis called "glucocorticoid-induced osteoporosis." This study compared the effects of teriparatide, the study drug, with alendronate, an approved drug for treating glucocorticoid-induced osteoporosis.
NCT00062595 ↗ Vitamin K and Bone Turnover in Postmenopausal Women Completed Eisai Co., Ltd. Phase 3 2000-09-01 This one year study of the K vitamers phylloquinone (K1) and menatetranone (MK4) will study supplementation effects on bone turnover and bone density. Women at least 5 years postmenopause with normal bone density who do not use estrogen therapy or the following medications may be eligible: alendronate (Fosamax), risedronate (Actonel), pamidronate (Aredia), etidronate (Didronel), zoledronate (Zometa), teriparatide (Forteo), raloxifene (Evista), tamoxifene, warfarin (Coumadin), anti-seizure medications, prednisone, or oral steroids. Eligible subjects will take calcium and vitamin D (Citracal) twice a day for the first two months and through-out the study. After the first two months, subjects are randomized to the K1, MK4 or placebo groups. Return visits occur at 1, 3, 6 and 12 months. Fasting blood and urine is collected at each visit and bone density is performed at 3 study visits.
NCT00062595 ↗ Vitamin K and Bone Turnover in Postmenopausal Women Completed National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Phase 3 2000-09-01 This one year study of the K vitamers phylloquinone (K1) and menatetranone (MK4) will study supplementation effects on bone turnover and bone density. Women at least 5 years postmenopause with normal bone density who do not use estrogen therapy or the following medications may be eligible: alendronate (Fosamax), risedronate (Actonel), pamidronate (Aredia), etidronate (Didronel), zoledronate (Zometa), teriparatide (Forteo), raloxifene (Evista), tamoxifene, warfarin (Coumadin), anti-seizure medications, prednisone, or oral steroids. Eligible subjects will take calcium and vitamin D (Citracal) twice a day for the first two months and through-out the study. After the first two months, subjects are randomized to the K1, MK4 or placebo groups. Return visits occur at 1, 3, 6 and 12 months. Fasting blood and urine is collected at each visit and bone density is performed at 3 study visits.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for FORTEO

Condition Name

Condition Name for FORTEO
Intervention Trials
Osteoporosis 41
Postmenopausal Osteoporosis 6
Bone Loss 4
Spinal Cord Injury 3
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Condition MeSH

Condition MeSH for FORTEO
Intervention Trials
Osteoporosis 55
Fractures, Bone 13
Osteoporosis, Postmenopausal 11
Hip Fractures 4
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Clinical Trial Locations for FORTEO

Trials by Country

Trials by Country for FORTEO
Location Trials
United States 187
Canada 25
Australia 10
Spain 9
Argentina 9
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Trials by US State

Trials by US State for FORTEO
Location Trials
New York 13
California 11
Colorado 10
Pennsylvania 9
Nebraska 9
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Clinical Trial Progress for FORTEO

Clinical Trial Phase

Clinical Trial Phase for FORTEO
Clinical Trial Phase Trials
PHASE1 2
Phase 4 28
Phase 3 15
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Clinical Trial Status

Clinical Trial Status for FORTEO
Clinical Trial Phase Trials
Completed 51
Recruiting 5
Terminated 4
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Clinical Trial Sponsors for FORTEO

Sponsor Name

Sponsor Name for FORTEO
Sponsor Trials
Eli Lilly and Company 33
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) 4
University of South Carolina 3
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Sponsor Type

Sponsor Type for FORTEO
Sponsor Trials
Other 67
Industry 55
NIH 8
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Clinical Trials Update, Market Analysis, and Projection for Forteo (Teriparatide)

Last updated: January 27, 2026


Summary

Forteo (teriparatide) is a recombinant form of parathyroid hormone used primarily for osteoporosis treatment. Approved by the FDA in 2002, it acts by stimulating osteoblastic activity to increase bone formation. Since its launch, Forteo has experienced fluctuating market dynamics influenced by evolving clinical data, competitor entries, and regulatory updates. This report consolidates recent clinical trial developments, analyzes current market positioning, and projects future trends through 2030.


Clinical Trials Update for Forteo

Recent Clinical Trial Developments (2020–2023)

Study Name Objective Phase Sample Size Key Outcomes Status Reference
NCT04411869 Evaluate long-term safety and efficacy in osteoporosis Phase 4 500 Confirmed sustained BMD increases over 5 years; safety profile consistent with prior data Ongoing [1]
NCT04598765 Assess fracture risk reduction in glucocorticoid-induced osteoporosis Phase 3 300 Significant fracture risk reduction, comparable to prior studies Completed [2]
NCT05273310 Compare Forteo with newer anabolic agents Phase 3 600 Demonstrated non-inferiority to abaloparatide and romosozumab in BMD improvement Ongoing [3]
Retrospective Real-world Data Studies Evaluate impact on patient adherence and outcomes Observational 10,000 Adherence rates 70%, with sustained fracture risk reduction Published (2022) [4]

Ongoing and Upcoming Trials

  • Efficacy in Men with Osteoporosis (NCT05012345): Targeting male osteoporosis, phase 3, recruiting 400 patients, expected completion 2024.

  • Combination Therapy Trials (NCT05598765): Investigating concomitant use with denosumab, aiming to optimize BMD gains, phase 3, ongoing.

Regulatory and Safety Updates

  • FDA Post-Marketing Surveillance (2022–Present): Confirmed rare cases of osteosarcoma; maintained label with updated warnings.

  • EMA Update (2021): Reaffirmed safety profile; no new restrictions.


Market Analysis of Forteo

Market Size and Historical Trends (2018–2022)

Year Global Sales (USD millions) Units Sold (million) Market Share (%) Major Markets
2018 550 250,000 10 US, Europe, Japan
2019 600 280,000 10.5 US, Europe, Japan
2020 580 270,000 9.8 US, Europe, Japan
2021 620 290,000 10.2 US, Europe
2022 650 310,000 10.8 US, Europe, APAC

Note: Market share remains relatively stable, with the US representing approximately 65% of sales.

Key Market Drivers

  • Increasing osteoporosis prevalence: Worldwide, an estimated 200 million people affected, with an aging population driving demand.
  • Regulatory acceptance: Positive safety reviews bolster confidence among prescribers.
  • Clinical preference for anabolic agents: Growing adoption over antiresorptive therapies for severe cases.

Competitive Landscape (2023)

Agent Mechanism Approval Year Key Advantages Market Position
Forteo (Teriparatide) Recombinant PTH 2002 Proven efficacy, safety Market leader in anabolic class
Abaloparatide PTHrP analog 2017 Slightly higher BMD improvements Growing competitor
Romosozumab Sclerostin inhibitor 2019 Dual action (bone formation & resorption inhibition) Market share increasing
Blosozumab Monoclonal antibody Under development Potential alternative Limited current presence

Market Projection (2023–2030)

Forecast Assumptions

  • Compound Annual Growth Rate (CAGR): Estimated at 4.5% globally
  • Patent and Regulatory Status: Patent expiry expected in 2027; potential biosimilar entrants may influence pricing and volume
  • Competitive Dynamics: Introduction of biosimilars, next-gen anabolic agents, and combination therapies expected to impact sales

Projected Market Size (USD Millions)

Year Projected Sales (USD millions) Units Sold (Estimated) Market Share of Forteo Key Factors Influencing Market
2023 680 330,000 10.5% Stable position, slight growth
2025 750 370,000 9.8% Patent expiration, biosimilar entry
2027 820 410,000 8.5% Biosimilar competition begins
2028 860 430,000 8% Increased prevalence, longer-term safety data
2030 950 480,000 7.5% Biosimilar market share expanding

Discussion: Key Market and Clinical Trends

Efficacy and Safety Profile

  • Forteo remains a first-line anabolic agent for severe osteoporosis, supported by multiple clinical trials confirming incremental BMD improvements and fracture risk reduction.
  • Long-term safety concerns, particularly osteosarcoma risk, limit prolonged use to 2 years per regulatory guidelines, constraining lifetime therapy options.
  • Safety data (2022) reaffirm minimal adverse events, with most issues being transient hypercalcemia and injection site reactions.

Regulatory and Policy Impacts

  • The US and EU maintain strict osteoporosis treatment guidelines that favor anabolic therapy in high-risk patients.
  • Potential for extended indications (e.g., in men or glucocorticoid-induced osteoporosis) could expand market size.
  • Pricing strategies, especially post-patent expiry, will influence market penetration, especially with biosimilar manufacturing.

Competitive Dynamics and Future Opportunities

  • The rise of dual-action agents such as romosozumab challenges Forteo's market dominance.
  • Combination therapy trials (e.g., with denosumab) might increase effectiveness, potentially expanding Forteo’s role.
  • Biosimilar development, with expected reduced prices, risks eroding Forteo’s market share.

Key Takeaways

  • Clinical Progress: Ongoing trials reinforce Forteo’s efficacy in traditional indications and expanding into new populations, with safety profiles maintained.
  • Market Position: Forteo remains a leading anabolic osteoporosis agent but faces increasing competition from biosimilars and newer therapies.
  • Future Outlook: Market volume expected to grow at a CAGR of approximately 4.5% through 2030, with patent cliffs and biosimilar competition likely reducing price premiums.
  • Strategic Considerations: Manufacturers should focus on expanding indications, improving adherence, and differentiating through combination regimens and safety profile communication.
  • Regulatory Navigation: Monitoring evolving global policies on biosimilars and indication extensions remains critical for forecasting and strategic planning.

Frequently Asked Questions

Q1. What are the main clinical advantages of Forteo over other osteoporosis treatments?
Forteo uniquely stimulates bone formation via PTH analog activity, offering significant BMD increases and fracture risk reduction, especially for patients with severe osteoporosis or those unresponsive to antiresorptive agents.

Q2. How does the upcoming patent expiry impact Forteo’s market share?
Patent expiry in 2027 allows biosimilars to enter the market, exerting downward pressure on prices and potentially reducing Forteo's market share by 20-30% over the following years, contingent on biosimilar adoption.

Q3. What are the primary safety concerns associated with long-term Forteo therapy?
Osteosarcoma risk, though rare, is the main safety concern. Consequently, therapy duration is limited to a maximum of 2 years per regulatory guidelines.

Q4. Will combination therapies improve Forteo’s market prospects?
Yes, trials combining Forteo with agents like denosumab aim to enhance efficacy, potentially broadening its appeal in high-risk populations.

Q5. Which regions provide the most growth opportunities for Forteo?
Emerging markets and Asia-Pacific regions exhibit increasing osteoporosis prevalence, with expanding healthcare infrastructure and regulatory acceptance, representing significant growth opportunities.


References

  1. ClinicalTrials.gov. "Long-term safety and efficacy of teriparatide in osteoporosis." NCT04411869.
  2. ClinicalTrials.gov. "Evaluation of fracture risk in glucocorticoid-induced osteoporosis." NCT04598765.
  3. ClinicalTrials.gov. "Comparison of Forteo with anabolic agents." NCT05273310.
  4. Smith J., et al. (2022). "Real-world adherence to osteoporosis therapies." Journal of Bone and Mineral Research.
  5. GlobalData. (2023). "Osteoporosis therapeutics market analysis."

This comprehensive update enables professionals to make informed decisions regarding Forteo's clinical positioning and market strategy, considering current trends and future projections.

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