Last Updated: June 25, 2026

CLINICAL TRIALS PROFILE FOR VIBRAMYCIN


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All Clinical Trials for VIBRAMYCIN

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00358462 ↗ Mycoplasma Genitalium Antibiotic Susceptibility and Treatment (MEGA) Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 3 2007-01-01 The purpose of this study is to find out which of 2 different antibiotics, doxycycline or azithromycin, works best against germs that may cause nongonococcal urethritis. Study participants will include approximately 1200 men, 16 years of age or older, attending a sexually transmitted diseases clinic in Seattle, Washington with clinical signs of urethral inflammation (>=5PMNs/HPF on a Gram-stained slide prepared from urethral exudates and/or a visible urethral discharge upon examination). Urine specimens will be collected and tested for Mycoplasma genitalium and Ureaplasmas. Each participant will receive a blinded packet of study medication. Participants will answer an enrollment questionnaire and will also receive a log to complete between visits to record information about treatment adherence, side effects, symptoms, and sexual activity. All subjects will be asked to return for evaluation 3 weeks after the initial clinic visit. Subjects who test positive for M. genitalium and/or Ureaplasmas at the initial clinic visit will also be asked to return for a third study visit, 6 weeks following the initial clinic visit. During follow-up visits, participants will answer a follow-up questionnaire and will be re-evaluated for signs of urethritis. Those who were initially positive for M. genitalium and/or Ureaplasmas will be re-tested for these organisms. Study participants with signs and/or symptoms of urethritis or who test positive for M. genitalium or Ureaplasmas at the follow-up study visit will receive another blinded treatment packet containing the alternate medication. Those who require additional treatment at the 6-week visit will be asked to return for a fourth follow-up study visit at 9-10 weeks. Study participants who did not test positive for M. genitalium or Ureaplasmas at the initial clinic visit, but who continue to demonstrate signs and/or symptoms of infection at their single follow-up study visit will treated according to clinic standard of care (after the study clinician unblinds their randomly-assigned treatment regimen).
NCT00358462 ↗ Mycoplasma Genitalium Antibiotic Susceptibility and Treatment (MEGA) Completed University of Washington Phase 3 2007-01-01 The purpose of this study is to find out which of 2 different antibiotics, doxycycline or azithromycin, works best against germs that may cause nongonococcal urethritis. Study participants will include approximately 1200 men, 16 years of age or older, attending a sexually transmitted diseases clinic in Seattle, Washington with clinical signs of urethral inflammation (>=5PMNs/HPF on a Gram-stained slide prepared from urethral exudates and/or a visible urethral discharge upon examination). Urine specimens will be collected and tested for Mycoplasma genitalium and Ureaplasmas. Each participant will receive a blinded packet of study medication. Participants will answer an enrollment questionnaire and will also receive a log to complete between visits to record information about treatment adherence, side effects, symptoms, and sexual activity. All subjects will be asked to return for evaluation 3 weeks after the initial clinic visit. Subjects who test positive for M. genitalium and/or Ureaplasmas at the initial clinic visit will also be asked to return for a third study visit, 6 weeks following the initial clinic visit. During follow-up visits, participants will answer a follow-up questionnaire and will be re-evaluated for signs of urethritis. Those who were initially positive for M. genitalium and/or Ureaplasmas will be re-tested for these organisms. Study participants with signs and/or symptoms of urethritis or who test positive for M. genitalium or Ureaplasmas at the follow-up study visit will receive another blinded treatment packet containing the alternate medication. Those who require additional treatment at the 6-week visit will be asked to return for a fourth follow-up study visit at 9-10 weeks. Study participants who did not test positive for M. genitalium or Ureaplasmas at the initial clinic visit, but who continue to demonstrate signs and/or symptoms of infection at their single follow-up study visit will treated according to clinic standard of care (after the study clinician unblinds their randomly-assigned treatment regimen).
NCT00829764 ↗ Doxycycline Monohydrate 25 mg (5mL) Oral Suspension Under Fasting Conditions Completed Teva Pharmaceuticals USA Phase 1 2006-10-01 The objective of this single-dose, open-label, randomized, two-period crossover study was to compare the rate of absorption and oral bioavailability of a test formulation of doxycycline monohydrate 1 x 25 mg (5mL) oral suspension manufactured by IVAX Pharmaceuticals, Inc. and distributed by TEVA Pharmaceuticals USA to an equivalent oral dose of the commercially available reference product, Vibramycin Monohydrate® manufactured by Pfizer, Inc. following an overnight fast of at least 10 hours.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for VIBRAMYCIN

Condition Name

Condition Name for VIBRAMYCIN
Intervention Trials
Malignant Neoplasms of Respiratory and Intrathoracic Organs 2
Cystic Fibrosis 2
Healthy 2
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Condition MeSH

Condition MeSH for VIBRAMYCIN
Intervention Trials
Infections 3
Pleural Effusion, Malignant 2
Pleural Effusion 2
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Clinical Trial Locations for VIBRAMYCIN

Trials by Country

Trials by Country for VIBRAMYCIN
Location Trials
United States 55
Mexico 1
China 1
Lao People's Democratic Republic 1
Canada 1
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Trials by US State

Trials by US State for VIBRAMYCIN
Location Trials
Texas 7
New York 4
California 4
Ohio 3
Michigan 2
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Clinical Trial Progress for VIBRAMYCIN

Clinical Trial Phase

Clinical Trial Phase for VIBRAMYCIN
Clinical Trial Phase Trials
Phase 4 5
Phase 3 3
Phase 2/Phase 3 1
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Clinical Trial Status

Clinical Trial Status for VIBRAMYCIN
Clinical Trial Phase Trials
Completed 12
Recruiting 3
Unknown status 3
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Clinical Trial Sponsors for VIBRAMYCIN

Sponsor Name

Sponsor Name for VIBRAMYCIN
Sponsor Trials
M.D. Anderson Cancer Center 3
Teva Pharmaceuticals USA 2
Hamilton Health Sciences Corporation 1
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Sponsor Type

Sponsor Type for VIBRAMYCIN
Sponsor Trials
Other 31
NIH 7
Industry 5
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Vibramycin (Doxycycline): Clinical Trial Update, Market Analysis, and Projection

Last updated: April 28, 2026

What is Vibramycin and where does it sit clinically?

Vibramycin is the brand name for doxycycline (a tetracycline-class antibiotic). In major markets, doxycycline is widely available as both innovator-branded and generic products, with clinical use focused on bacterial infections and, in separate indications, inflammatory conditions where doxycycline is used for its anti-inflammatory properties.

From an IP and development standpoint, Vibramycin is a mature product: most market access comes from generic competition rather than new patent-protected drug substance or formulation expansions.

Clinical development reality for Vibramycin

Because doxycycline is off-patent in most jurisdictions, “clinical trials for Vibramycin” in practice usually means:

  • New doxycycline combinations (fixed-dose combinations, adjunct regimens)
  • New formulations (improved absorption or dosing convenience)
  • New indications (often antimicrobial stewardship or specialty infectious disease endpoints)
  • Bioequivalence and formulation bridging rather than de novo phase 3 efficacy programs

This means the highest signal in “clinical trial updates” tends to come from new doxycycline-containing products rather than Vibramycin-branded monotherapy.

What is the current clinical trial signal for doxycycline?

The public clinical trial landscape for doxycycline includes ongoing or recently completed studies that are typically grouped into four categories:

  1. Doxycycline in combination regimens
    • Studies testing doxycycline as part of multi-drug treatment strategies in defined pathogens or syndromes.
  2. Doxycycline in special populations or care settings
    • Trials in pediatrics, outpatient settings, or alternative treatment pathways tied to guidelines.
  3. Formulation and dosing optimization
    • Bioavailability and tolerability studies, including modified release and alternative dosing schedules.
  4. Non-infectious or mixed inflammatory indications
    • Studies testing doxycycline’s anti-inflammatory effects in skin and other inflammatory conditions (where doxycycline is used off-label or under specific approved labels depending on geography).

No single “Vibramycin” master protocol dominates the global pipeline because Vibramycin is not the sponsor-branded driver of new clinical programs. The molecule is mature, and trial activity is typically anchored to product-specific entrants and combination strategies.

What are the approved and commercially relevant doxycycline use areas?

Commercial relevance is dominated by doxycycline’s established role across:

  • Respiratory tract infections (community-acquired bacterial infections)
  • Sexually transmitted infection regimens where doxycycline is a guideline cornerstone (notably for chlamydia)
  • Tick-borne infections in empiric settings (region and guideline dependent)
  • Acne and rosacea (topical or oral doxycycline programs vary by geography and formulation)
  • Other bacterial indications consistent with tetracycline antimicrobial use patterns

Why this matters for clinical-trial reading

When trial updates show up for doxycycline, the endpoints and inclusion criteria often map to:

  • Antimicrobial stewardship and resistance-aware treatment pathways
  • Line-of-therapy placement in guidelines
  • Non-infectious endpoints where doxycycline has anti-inflammatory activity

What does the market look like for doxycycline, and where does “Vibramycin” fit?

Market structure

The doxycycline market is characterized by:

  • High generic penetration
  • Price pressure
  • Broad physician familiarity
  • Formulary access driven by cost and availability

As a result, “Vibramycin” market performance is less about unit growth from new approvals and more about:

  • Share shifts between branded inventory and generic entrants
  • Stability of guideline dosing practices
  • Seasonal and regional disease incidence
  • Supply chain and pricing cycles

Market drivers

The principal commercial drivers for doxycycline are:

  • Persistent demand for standard-of-care antibiotics in common infections
  • Continued guideline use for specific sexually transmitted and tick-borne syndromes
  • Ongoing use in acne/rosacea programs depending on local regulatory status of doxycycline formulations

Market headwinds

Key constraints:

  • Generic substitution and margin compression
  • Competitive pressure from other tetracyclines and alternative antibiotic classes
  • Regulatory scrutiny on antibiotic use and resistance containment
  • Supply and quality control risks in mature manufacturing ecosystems

What projections are most credible for doxycycline (and by extension Vibramycin)?

For mature antibiotics with extensive generic exposure, projections typically show:

  • Low-to-mid single-digit value growth
  • Flatter unit growth (with periodic surges linked to seasonal infection patterns and guideline cycles)
  • Declining branded share unless supported by formulary differentiation, supply stability, or differentiation via formulations in premium segments

Business-oriented projection framework (value vs volume)

A practical way to project Vibramycin performance is to model:

  • Global doxycycline volume growth tied to infection incidence and guideline adherence
  • Average realized price erosion due to generic competition
  • Share drift: branded erosion vs generic uptake; branded stabilization possible in certain markets where supply and contracting favor incumbent brands

Clinical trial update: what moves the needle for commercial outcomes?

The commercial impact of doxycycline trial activity tends to be concentrated in these areas:

  • New combination approvals that change standard regimen selection
  • Formulation changes that improve adherence or reduce dosing frequency (if regulatory pathways support label differentiation)
  • New specialty indications with formal regulatory updates rather than off-label expansion
  • Resistance-aware stewardship trials that influence guideline updates

For Vibramycin-branded monotherapy specifically, the most meaningful “clinical trial updates” are often not phase 3 efficacy programs. Instead, the market impact comes from product lifecycle mechanics:

  • Generic entrants filing for and receiving approvals
  • Contracting and tender wins in hospitals and outpatient channels
  • Supply continuity affecting guideline adherence

Key clinical development watchlist (doxycycline molecule)

Track trial activity and regulatory actions that would plausibly shift:

  • Guideline position
  • Label breadth
  • Preferred regimen selection
  • Formulary status

Commercially meaningful categories:

  • Doxycycline-based combination regimens with defined endpoints
  • Renal or hepatic impairment dosing and safety updates where label revisions are possible
  • Skin indications tied to formal label changes for specific oral or topical doxycycline products

Key Takeaways

  • Vibramycin is doxycycline, a mature antibiotic with clinical usage anchored to established guideline positions and broad generic availability.
  • “Clinical trial updates” for Vibramycin are usually product- and combination-specific, not de novo brand-dominant phase 3 programs.
  • Market growth for doxycycline is constrained by generic substitution; credible projections center on value growth from volume stability plus modest mix effects, with continued branded share pressure.
  • Commercial upside for Vibramycin is most likely to come from label-relevant formulation differentiation, combination regimen approvals, or regional contracting and supply stability, not from molecule-level innovation.

FAQs

  1. Is Vibramycin currently in phase 3 development?
    Vibramycin-branded doxycycline generally is not the focus of phase 3 molecule-defining programs; most active trial activity relates to specific doxycycline products, combinations, or formulation changes.

  2. What types of clinical trials for doxycycline matter most for market impact?
    Studies that support new combinations, label expansions, or formulation differentiation with clear regulatory outcomes.

  3. Why does doxycycline market growth tend to be modest?
    Broad generic availability drives pricing pressure, so value growth usually tracks more slowly than volume and often depends on mix and contracting.

  4. Which indications drive doxycycline demand most consistently?
    Common bacterial infections plus guideline-driven regimens for sexually transmitted and tick-borne syndromes; skin indications matter where oral/topical doxycycline is used per label or local guidance.

  5. What is the most realistic projection for a branded doxycycline product like Vibramycin?
    Branded performance typically trends with regional formulary dynamics and supply stability, while overall market value grows slowly due to ongoing generic competition.


References

[1] ClinicalTrials.gov. Doxycycline (search results and study records). https://clinicaltrials.gov/
[2] U.S. Food and Drug Administration. Label and drug product information for doxycycline-containing products (public database and label repository). https://www.accessdata.fda.gov/
[3] World Health Organization. Antimicrobial use guidance and information on antibiotic stewardship (context for doxycycline use in practice). https://www.who.int/
[4] PubMed. Doxycycline clinical research and review articles (evidence and indication context). https://pubmed.ncbi.nlm.nih.gov/

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