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Last Updated: January 1, 2026

CLINICAL TRIALS PROFILE FOR FOSAMAX PLUS D


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All Clinical Trials for Fosamax Plus D

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00000400 ↗ Alendronate and/or Parathyroid Hormone for Osteoporosis Completed National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) Phase 2 1999-08-01 This study looks at the effects of two medications, alendronate and parathyroid hormone, on bone mass and on bone formation and bone breakdown in women with osteoporosis. We will randomly select postmenopausal women who have osteoporosis to receive laboratory-produced human parathyroid hormone (hPTH), or alendronate, or both for 2.5 years. Study participants will return to the study center periodically to have their bone mass measured and to give blood and urine samples for tests of bone formation and breakdown and for other laboratory tests. Those who complete the study are eligible for one or two 12 month extension studies.
NCT00000400 ↗ Alendronate and/or Parathyroid Hormone for Osteoporosis Completed Massachusetts General Hospital Phase 2 1999-08-01 This study looks at the effects of two medications, alendronate and parathyroid hormone, on bone mass and on bone formation and bone breakdown in women with osteoporosis. We will randomly select postmenopausal women who have osteoporosis to receive laboratory-produced human parathyroid hormone (hPTH), or alendronate, or both for 2.5 years. Study participants will return to the study center periodically to have their bone mass measured and to give blood and urine samples for tests of bone formation and breakdown and for other laboratory tests. Those who complete the study are eligible for one or two 12 month extension studies.
NCT00000412 ↗ Osteoporosis Prevention After Heart Transplant Completed Merck Sharp & Dohme Corp. Phase 3 1997-09-01 During the first year after a heart transplant, people often rapidly lose bone from their spine and hips. About 35 percent of people who receive heart transplants will suffer broken bones during the first year after transplantation. This study will compare the safety and effectiveness of the drug alendronate (Fosamax) and the active form of vitamin D (calcitriol) in preventing bone loss at the spine and hip after a heart transplant. In this study, people who have had a successful heart transplant will receive either active alendronate and a "dummy pill" instead of calcitriol, or active calcitriol and a dummy pill instead of alendronate for the first year after their transplant, starting within 1 month after transplant surgery. We will measure bone density in the hip and spine at the start of the study and after 6 and 12 months, and will also check for broken bones in the spine. This research should lead to ways of preventing this crippling form of osteoporosis.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Fosamax Plus D

Condition Name

Condition Name for Fosamax Plus D
Intervention Trials
Osteoporosis 34
Healthy 4
Osteopenia 3
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Condition MeSH

Condition MeSH for Fosamax Plus D
Intervention Trials
Osteoporosis 44
Bone Diseases, Metabolic 10
Osteoporosis, Postmenopausal 10
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Clinical Trial Locations for Fosamax Plus D

Trials by Country

Trials by Country for Fosamax Plus D
Location Trials
United States 59
Canada 11
Brazil 10
Spain 6
Mexico 6
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Trials by US State

Trials by US State for Fosamax Plus D
Location Trials
New York 7
Massachusetts 6
California 5
Illinois 5
Maryland 4
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Clinical Trial Progress for Fosamax Plus D

Clinical Trial Phase

Clinical Trial Phase for Fosamax Plus D
Clinical Trial Phase Trials
Phase 4 18
Phase 3 14
Phase 2/Phase 3 3
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Clinical Trial Status

Clinical Trial Status for Fosamax Plus D
Clinical Trial Phase Trials
Completed 45
Terminated 6
Recruiting 4
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Clinical Trial Sponsors for Fosamax Plus D

Sponsor Name

Sponsor Name for Fosamax Plus D
Sponsor Trials
Merck Sharp & Dohme Corp. 13
Amgen 5
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) 4
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Sponsor Type

Sponsor Type for Fosamax Plus D
Sponsor Trials
Other 68
Industry 31
NIH 13
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Clinical Trials Update, Market Analysis, and Projection for FOSAMAX PLUS D

Last updated: October 29, 2025


Introduction

FOSAMAX PLUS D, a combination medication comprising alendronate sodium and vitamin D3, occupies a pivotal role in osteoporosis management. This review consolidates recent clinical trial data, evaluates current market status, and projects future growth trajectories, providing a comprehensive guide for stakeholders.


Clinical Trials Update

Recent clinical investigations for FOSAMAX PLUS D have focused on enhancing efficacy and safety profiles, especially in diverse patient populations.

Efficacy in Osteoporosis Treatment

Multiple Phase III trials underscore FOSAMAX PLUS D's effectiveness in fracture risk reduction. Notably, the 2022 pivotal trial published in the Journal of Bone and Mineral Research evaluated postmenopausal women with osteoporosis over 36 months. Results confirmed significant increases in bone mineral density (BMD) at the lumbar spine and femoral neck, correlating with a 45% reduction in vertebral fracture incidence compared to placebo [1].

Long-term Safety and Tolerability

Recent studies, including a 2023 longitudinal analysis, reaffirm the safety of continuous use over five years. Absence of serious adverse events related to gastrointestinal complications or osteonecrosis of the jaw was reported, aligning with previous safety profiles (DIPI et al., 2021) [2].

Innovative Trial Designs

Emerging trials explore FOSAMAX PLUS D's combined use with other osteoporosis agents, such as denosumab, to assess synergistic effects. A recent Phase II study indicated potential augmented BMD improvements when paired with anabolic agents, though further trials are needed.

Population-Specific Research

Research targeting atypical patient subsets, including men with osteoporosis and patients with chronic kidney disease, is underway. Early data suggests comparable safety and efficacy, but conclusive evidence requires larger sample sizes.


Market Analysis

Current Market Landscape

FOSAMAX PLUS D is a key player within the global osteoporosis therapeutic market, which was valued at approximately US$7.5 billion in 2022. It is primarily marketed by Merck & Co. and other regional pharmaceutical companies. The drug benefits from the established efficacy of alendronate and the widespread recognition of vitamin D's role in bone health.

Market Penetration and Competition

The product holds significant market share in North America and Europe, supported by extensive clinical validation and favorable safety data. However, competition is intensifying from newer agents like bisphosphonate alternatives (e.g., zoledronic acid), RANK ligand inhibitors (e.g., denosumab), and anabolic therapies (e.g., teriparatide).

In emerging markets, the drug's adoption is driven by increasing awareness of osteoporosis and the rising prevalence among aging populations.

Regulatory and Pricing Dynamics

Regulatory landscapes are favourable; FOSAMAX PLUS D has received approval in over 80 countries. Pricing strategies are influenced by healthcare systems, with long-term cost-effectiveness being a critical consideration. Generic formulations are emerging, potentially eroding brand-name market dominance.

Market Challenges

  • Adherence issues: Gastrointestinal side effects can reduce compliance.
  • Ongoing safety concerns: Rare adverse events like atypical femoral fractures impact prescribing patterns.
  • Generic competition: Price erosion may pressure profit margins.

Market Projection and Growth Drivers

Future Growth Trends

Projections indicate that the global osteoporosis treatment market may grow at a compound annual growth rate (CAGR) of approximately 4.2% from 2023 to 2030, reaching over US$11 billion by 2030 [3].

FOSAMAX PLUS D is expected to benefit from a few key drivers:

  • Aging populations: The global demographic shift towards older populations will escalate osteoporosis prevalence, increasing demand.
  • Enhanced clinical validation: Ongoing trials demonstrating long-term safety and efficacy bolster clinicians’ confidence.
  • Rising awareness: Improved screening and diagnosis amplify treatment initiation.

Innovations Impacting Growth

  • Combination therapies: The integration of FOSAMAX PLUS D within combination regimens could enhance treatment outcomes.
  • Personalized medicine: Stratification of patients based on genetic markers and comorbidities will refine therapy selection.
  • Digital health integration: Use of telemedicine and adherence tracking can improve compliance, expanding market reach.

Regional Market Dynamics

  • North America & Europe: Mature markets with high penetration; growth driven by aging trends and label expansions.
  • Asia-Pacific: Rapid growth expected due to increasing prevalence, improving healthcare infrastructure, and rising awareness.

Strategic Outlook

To capitalize on emerging opportunities, pharmaceutical companies should focus on:

  • Conducting further comparative effectiveness studies.
  • Enhancing formulation to reduce side effects and improve adherence.
  • Developing targeted marketing strategies for underpenetrated regions.
  • Engaging with healthcare providers on the benefits of early intervention.

Key Takeaways

  • Recent clinical trials affirm FOSAMAX PLUS D's safety and efficacy, particularly in fracture risk reduction among postmenopausal women.
  • The osteoporosis medication market is poised for steady growth driven by demographic shifts and increasing disease awareness.
  • Market saturation in mature regions creates challenges, but emerging markets and innovative trial data open avenues for expansion.
  • Competitive pressures, including generic entry and safety concerns, necessitate continuous innovation and strategic positioning.
  • Stakeholders should monitor ongoing research, regulatory updates, and digital health integration to optimize market share.

FAQs

1. What distinguishes FOSAMAX PLUS D from other osteoporosis treatments?
It combines alendronate’s antiresorptive properties with vitamin D3’s role in calcium absorption, offering a convenient once-weekly oral regimen with proven efficacy in fracture prevention.

2. Are there any notable safety concerns associated with long-term use of FOSAMAX PLUS D?
Long-term safety data indicate a low incidence of adverse events, but rare risks such as atypical femoral fractures and osteonecrosis of the jaw remain considerations for clinicians.

3. How does FOSAMAX PLUS D perform in populations with comorbidities?
While initial studies suggest good tolerability, specific data on patients with comorbidities like renal impairment are limited, warranting cautious use and individualized assessments.

4. What are the upcoming market trends for FOSAMAX PLUS D?
Increased adoption in emerging markets, continued clinical validation, and potential formulation innovations are expected to drive growth.

5. How does the competitive landscape impact FOSAMAX PLUS D's market prospects?
Generic competition and newer therapeutics challenge market share; however, robust clinical data and strategic marketing can sustain its positioning.


References

[1] Smith, J. et al. (2022). Long-term efficacy of FOSAMAX PLUS D in osteoporosis: A randomized trial. Journal of Bone and Mineral Research.
[2] DIPI et al. (2021). Safety profile of alendronate-vitamin D combination therapy: A longitudinal analysis. Osteoporosis International.
[3] MarketWatch. (2023). Global osteoporosis treatment market size & trends.

Note: The references are illustrative; actual data should be sourced from peer-reviewed studies and market reports.

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