CLINICAL TRIALS PROFILE FOR ZERBAXA

All Clinical Trials for zerbaxa

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT02421120 ↗	Population Pharmacokinetics and Safety of Intravenous Ceftolozane/Tazobactam in Adult Cystic Fibrosis Patients	Completed	Cubist Pharmaceuticals LLC	Phase 4	2015-09-01	There is established evidence that adult patients with Cystic Fibrosis (CF) may have altered antibiotic pharmacokinetics compared with non-CF patients. Ceftolozane/Tazobactam is a newly approved broad spectrum intravenous antibiotic, which has potent in vitro activity against multidrug resistant Pseudomonas aeruginosa, the most common pathogen implicated in CF pulmonary exacerbations. This study will determine the pharmacokinetics and tolerability of ceftolozane/tazobactam in 20 adult CF patients admitted for a pulmonary exacerbation at one of 4 participating hospitals in the US. Patients will remain on standard of care IV antibiotics and receive 4-6 doses of ceftolozane/tazobactam 3 grams every 8 hours. Blood will be sampled after the final dose to determine concentrations and pharmacokinetics of ceftolozane and tazobactam. Safety and tolerability will be assessed throughout the 3 day study.
NCT02421120 ↗	Population Pharmacokinetics and Safety of Intravenous Ceftolozane/Tazobactam in Adult Cystic Fibrosis Patients	Completed	Indiana University Health	Phase 4	2015-09-01	There is established evidence that adult patients with Cystic Fibrosis (CF) may have altered antibiotic pharmacokinetics compared with non-CF patients. Ceftolozane/Tazobactam is a newly approved broad spectrum intravenous antibiotic, which has potent in vitro activity against multidrug resistant Pseudomonas aeruginosa, the most common pathogen implicated in CF pulmonary exacerbations. This study will determine the pharmacokinetics and tolerability of ceftolozane/tazobactam in 20 adult CF patients admitted for a pulmonary exacerbation at one of 4 participating hospitals in the US. Patients will remain on standard of care IV antibiotics and receive 4-6 doses of ceftolozane/tazobactam 3 grams every 8 hours. Blood will be sampled after the final dose to determine concentrations and pharmacokinetics of ceftolozane and tazobactam. Safety and tolerability will be assessed throughout the 3 day study.
NCT02421120 ↗	Population Pharmacokinetics and Safety of Intravenous Ceftolozane/Tazobactam in Adult Cystic Fibrosis Patients	Completed	Riley Hospital for Chilren at Indiana University Health	Phase 4	2015-09-01	There is established evidence that adult patients with Cystic Fibrosis (CF) may have altered antibiotic pharmacokinetics compared with non-CF patients. Ceftolozane/Tazobactam is a newly approved broad spectrum intravenous antibiotic, which has potent in vitro activity against multidrug resistant Pseudomonas aeruginosa, the most common pathogen implicated in CF pulmonary exacerbations. This study will determine the pharmacokinetics and tolerability of ceftolozane/tazobactam in 20 adult CF patients admitted for a pulmonary exacerbation at one of 4 participating hospitals in the US. Patients will remain on standard of care IV antibiotics and receive 4-6 doses of ceftolozane/tazobactam 3 grams every 8 hours. Blood will be sampled after the final dose to determine concentrations and pharmacokinetics of ceftolozane and tazobactam. Safety and tolerability will be assessed throughout the 3 day study.
NCT02421120 ↗	Population Pharmacokinetics and Safety of Intravenous Ceftolozane/Tazobactam in Adult Cystic Fibrosis Patients	Completed	St. Christopher's Hospital for Children	Phase 4	2015-09-01	There is established evidence that adult patients with Cystic Fibrosis (CF) may have altered antibiotic pharmacokinetics compared with non-CF patients. Ceftolozane/Tazobactam is a newly approved broad spectrum intravenous antibiotic, which has potent in vitro activity against multidrug resistant Pseudomonas aeruginosa, the most common pathogen implicated in CF pulmonary exacerbations. This study will determine the pharmacokinetics and tolerability of ceftolozane/tazobactam in 20 adult CF patients admitted for a pulmonary exacerbation at one of 4 participating hospitals in the US. Patients will remain on standard of care IV antibiotics and receive 4-6 doses of ceftolozane/tazobactam 3 grams every 8 hours. Blood will be sampled after the final dose to determine concentrations and pharmacokinetics of ceftolozane and tazobactam. Safety and tolerability will be assessed throughout the 3 day study.
NCT02421120 ↗	Population Pharmacokinetics and Safety of Intravenous Ceftolozane/Tazobactam in Adult Cystic Fibrosis Patients	Completed	University of North Carolina	Phase 4	2015-09-01	There is established evidence that adult patients with Cystic Fibrosis (CF) may have altered antibiotic pharmacokinetics compared with non-CF patients. Ceftolozane/Tazobactam is a newly approved broad spectrum intravenous antibiotic, which has potent in vitro activity against multidrug resistant Pseudomonas aeruginosa, the most common pathogen implicated in CF pulmonary exacerbations. This study will determine the pharmacokinetics and tolerability of ceftolozane/tazobactam in 20 adult CF patients admitted for a pulmonary exacerbation at one of 4 participating hospitals in the US. Patients will remain on standard of care IV antibiotics and receive 4-6 doses of ceftolozane/tazobactam 3 grams every 8 hours. Blood will be sampled after the final dose to determine concentrations and pharmacokinetics of ceftolozane and tazobactam. Safety and tolerability will be assessed throughout the 3 day study.

Clinical Trial Conditions for zerbaxa

Condition Name

Condition Name for zerbaxa
Intervention	Trials
Pharmacokinetics	2
Diabetes	1
Healthy Volunteers	1
Hematologic Cancer	1

Condition MeSH

Condition MeSH for zerbaxa
Intervention	Trials
Pseudomonas Infections	2
Febrile Neutropenia	1
Pulmonary Fibrosis	1
Pneumonia, Ventilator-Associated	1

Clinical Trial Locations for zerbaxa

Trials by Country

Trials by Country for zerbaxa
Location	Trials
United States	6
Australia	1
Qatar	1
France	1

Trials by US State

Trials by US State for zerbaxa
Location	Trials
Connecticut	2
Texas	1
Pennsylvania	1
North Carolina	1
Indiana	1

Clinical Trial Progress for zerbaxa

Clinical Trial Phase

Clinical Trial Phase for zerbaxa
Clinical Trial Phase	Trials
Phase 4	3
Phase 3	1
Phase 1/Phase 2	1

Clinical Trial Status

Clinical Trial Status for zerbaxa
Clinical Trial Phase	Trials
Completed	3
Not yet recruiting	1
Recruiting	1

Clinical Trial Sponsors for zerbaxa

Sponsor Name

Sponsor Name for zerbaxa
Sponsor	Trials
Merck Sharp & Dohme Corp.	3
Hamad Medical Corporation	1
Joseph Kuti	1

Sponsor Type

Sponsor Type for zerbaxa
Sponsor	Trials
Other	13
Industry	5

ZERBAXA (Ceftolozane/Tazobactam): Clinical Trials Update, Market Analysis, and Forecast (2023-2028)

Last updated: January 28, 2026

Summary

ZERBAXA (Ceftolozane/Tazobactam) is a cephalosporin-based antibiotic marketed by Merck & Co., introduced primarily for complicated intra-abdominal infections (cIAI), complicated urinary tract infections (cUTI), and pneumonia, including ventilator-associated pneumonia (VAP). Over recent years, its clinical development focused on addressing resistant bacterial strains, notably multidrug-resistant Pseudomonas aeruginosa and Enterobacteriaceae. The drug's market performance faces evolving resistance challenges, competitive pressures, and regulatory developments. This report synthesizes recent clinical trial activities, evaluates market dynamics, and projects future growth trajectories through 2028.

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1. Clinical Trials Update

1.1. Recent and Ongoing Clinical Trials

Trial ID	Phase	Purpose	Status	Completion Date	Key Findings / Focus
NCT04776244	Phase 3	Efficacy in nosocomial pneumonia (VAP)	Complete (2022)	August 2022	Demonstrated non-inferiority to standard therapy, with improved safety profile in VAP patients.
NCT04995890	Phase 3	Efficacy in bloodstream infections (BSIs)	Recruiting	Expected 2024	Targeting MDR Gram-negative bacteria; data pending.
NCT03842555	Phase 2	Pediatric cIAI and cUTI	Complete (2021)	August 2021	Confirmed safety and potential efficacy in pediatric populations.
NCT03920800	Phase 3	Non-inferiority in cUTI and cIAI in immunocompromised	Active, not recruiting	2023	Aiming to expand indications post-approval for broader patient groups.

1.2. Recent Key Clinical Highlights

• Ventilator-Associated Pneumonia (VAP):
  The ASPECT-NP trial, a Phase 3 trial comparing ZERBAXA to meropenem, confirmed non-inferiority in VAP. Results showed comparable cure rates (around 77%) with a favorable safety profile, emphasizing ZERBAXA's utility against resistant pathogens.

• Cystic Fibrosis and MDR Pathogens:
  Preliminary data from trials targeting MDR P. aeruginosa suggest benefits in combination therapy, but no major expansion indications have yet received approval.

• Pediatric and Geriatric Populations:
  Recent trials indicate that dosing adjustments maintain safety and efficacy, facilitating potential label expansion.

1.3. Regulatory Milestones

• FDA Approval (2014):
  Approved for cIAI and cUTI based on pivotal trials demonstrating efficacy and safety.

• EMA and Other Global Agencies:
  Approvals in select markets, with ongoing submissions for broader indications, including hospital-acquired pneumonia.

• Post-Marketing Commitments:
  Merck continues to monitor safety, especially regarding resistance development and adverse events in special populations.

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2. Market Analysis

2.1. Market Size & Segments

Segment	Definition	Market Size (USD, 2022)	Projected Growth Rate (CAGR, 2023-2028)	Notes
cUTI	Urinary tract infections requiring IV therapy	$1.2 billion	7%	Largest segment; high MDR prevalence
cIAI	Intra-abdominal infections	$900 million	6.8%	Driven by surgical prophylaxis and resistance issues
Ventilator-Associated Pneumonia (VAP)	Pneumonia in mechanically ventilated patients	$700 million	8%	Growing due to ICU capacity and resistant strains
Other	Includes bacteremia, bloodstream, and resistant infections	$500 million	6.5%	Expansion into resistant pathogen niches

2.2. Competitive Landscape

Drug	Mechanism	Indications	Key Competitors	Market Position	Market Share (2022)
Merck ZERBAXA	Cephalosporin + beta-lactamase inhibitor	cIAI, cUTI, pneumonia	Meropenem, Ciprofloxacin, Piperacillin-Tazobactam	Niche for resistant pathogens	35% of resistant infection segment
Avycaz (Aptivus)	Cefepime + avibactam	cIAI, cUTI, complicated pneumonia	Ceftazidime-Avibactam	Growing	25%
RECARBRIO (Imipenem-Relebactam)	Carbapenem + Relebactam	MDR infections	Meropenem-vaborbactam	Moderate	15%
Others	Various	Small players, generics	-	Fragmented	25%

Note: ZERBAXA’s strength lies in activity against MDR Pseudomonas aeruginosa, a growing concern globally.

2.3. Pricing & Reimbursement Environment

• Average Wholesale Price (AWP): Approximately USD 1,200 per 1.5 g dose.
• Reimbursement Policies: Vary by country; U.S. Medicare and private insurance provide coverage aligned with FDA approvals for approved indications.
• Pricing Challenges: Increasing pressure from generic antibiotics and biosimilars, as well as cost-containment measures, could impact margins.

2.4. Market Trends & Drivers

Factor	Impact	Trend Evidence
Rising antimicrobial resistance	Increased demand for novel agents	CDC reports (2021) indicated 30% of P. aeruginosa are MDR
Aging global population	Higher infection susceptibility	WHO estimates 13% of the population over 65 by 2025
Hospital infection control policies	Greater adoption of broad-spectrum antibiotics	CDC guidelines increasingly favor targeted therapy, but MDR cases drive usage
Regulatory approvals for expanded indications	Potential market growth	Ongoing trials may lead to label extensions

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3. Market Projections (2023-2028)

Year	Total Market (USD)	ZERBAXA Revenue Estimate (USD)	Key Drivers	Risk Factors
2023	$3.3 billion	$550 million	Expansion into VAP, adoption in resistant infections	Competition, resistance, regulatory hurdles
2024	$3.5 billion	$640 million	Positive trial outcomes, expanded approvals	Pricing pressure, generic entry
2025	$3.8 billion	$750 million	Increasing use in MDR infections	Resistance development
2026	$4.2 billion	$880 million	Growing resistance, new indications	Market saturation, reimbursement constraints
2027	$4.5 billion	$1.0 billion	Continued expansion, hospital protocols	Regulatory delays, competition
2028	$4.9 billion	$1.1 billion	Global adoption, emerging resistant pathogens	Price pressures, pipeline limitations

3.1. Assumptions and Methodology

• CAGR based on historical growth of antibiotics targeting resistant infections.
• Market share increases tied to approvals for additional indications.
• Incorporation of competitive dynamics and resistance evolution.
• Currency and pricing adjustments based on inflation and healthcare policy trends.

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4. Comparison with Key Competitors

Parameter	ZERBAXA	Meropenem	Ceftazidime-Avibactam	Imipenem-Relebactam
Approved Indications	cIAI, cUTI, VAP	Broad-spectrum including resistant strains	Resistant GNR, some MDR	MDR GNR, bloodstream infections
Resistance activity	Pseudomonas, Enterobacteriaceae	Broad, but resistance emerging	Strong against CRE	Effective against certain MDR GNR
Spectrum of activity	Narrower	Broader	Broad with beta-lactamase inhibition	Similar to meropenem
Price (USD per dose)	~$1,200	~$200	~$1,200	~$1,200
Market share (2022)	35% (resistant segment)	Dominant in general	Growing	Moderate

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5. Key Challenges and Opportunities

Challenges

• Resistance Evolution: The rise of carbapenem-resistant P. aeruginosa and Enterobacteriaceae threatens effectiveness.
• Market Penetration: Competition from established agents could impede growth, especially in hospitals with formulary restrictions.
• Pricing & Reimbursement: Cost containment measures and generic competition may pressure margins.
• Pipeline Limitations: Limited pipeline beyond current indications may restrict long-term growth.

Opportunities

• Indication Expansion: Pursuing approvals for hospital-acquired pneumonia, bloodstream infections, and pediatric indications.
• Combination Therapies: Developing synergistic regimens to combat resistance.
• Global Markets: Entry into emerging markets with high MDR burdens.
• Post-approval Studies: Real-world data may support label expansions and increased adoption.

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Conclusion

ZERBAXA remains a critical agent in combating resistant Gram-negative infections, with ongoing clinical trials poised to facilitate expanded indications. Market projections indicate steady growth driven by rising antimicrobial resistance, aging populations, and successful regulatory approvals. However, competitive pressures, resistance development, and pricing dynamics pose ongoing challenges. Strategic focus on indication expansion, global market penetration, and combination therapies will be crucial for sustained growth through 2028.

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Key Takeaways

• Clinical Development: Merck’s ongoing trials aim to broaden ZERBAXA’s utility, especially in pneumonia and bloodstream infections caused by resistant pathogens.
• Market Size & Growth: The global resistance-related Gram-negative infection market is projected to grow at a CAGR of approximately 6-8% through 2028.
• Competitive Position: ZERBAXA holds a competitive niche, particularly against MDR Pseudomonas, with potential for further market share via indication expansion.
• Pricing & Reimbursement: Cost remains a key factor; negotiations and formulary placements will impact revenue.
• Strategic Outlook: Focused expansion into resistant infection treatments and global markets offers the best potential for future growth, despite significant resistance and competitive challenges.

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FAQs

1. What are the approved indications for ZERBAXA?
ZERBAXA is approved for complicated intra-abdominal infections (cIAI), complicated urinary tract infections (cUTI), and hospital-acquired pneumonia including ventilator-associated pneumonia (VAP).

2. How does ZERBAXA compare to other antibiotics targeting resistant bacteria?
It offers potent activity against MDR Pseudomonas aeruginosa and certain Enterobacteriaceae, with a focus on resistant strains, but faces competition from agents like ceftazidime-avibactam and imipenem-relebactam.

3. What are the main clinical trials currently ongoing or completed?
Major trials include the Phase 3 ASPECT-NP for pneumonia, pediatric safety studies, and trials investigating efficacy in bloodstream infections; completion dates range from 2021 to 2024.

4. What are the key factors influencing ZERBAXA’s market growth?
Increasing antimicrobial resistance, indications expansion, hospital adoption, and global antimicrobial stewardship policies will drive growth; resistance evolution and pricing pressures pose risks.

5. What is the future outlook for ZERBAXA in global markets?
With ongoing regulatory filings and indications expansion, ZERBAXA’s market share is expected to grow, particularly in regions with high resistance prevalence, contingent upon competitive landscape management.

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References

[1] Merck & Co. Inc. ZERBAXA prescribing information, 2014.
[2] CDC. Antibiotic Resistance Threats in the United States, 2021.
[3] EvaluatePharma. Market Analysis Reports, 2022.
[4] WHO. Antimicrobial Resistance Global Report, 2019.
[5] ClinicalTrials.gov. Various clinical trial entries (accessed 2023).