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Last Updated: April 15, 2026

CLINICAL TRIALS PROFILE FOR CHLORAMPHENICOL


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All Clinical Trials for chloramphenicol

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00277147 ↗ Salmonella Typhi Vi O-Acetyl Pectin-rEPA Conjugate Vaccine Completed Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Phase 1 2006-01-09 This study will evaluate a new (conjugate) vaccine for typhoid fever, which remains a serious disease especially difficult to treat in developing countries. Salmonella typhi, the bacteria causing typhoid fever, have become resistant to several antibiotics increasing the difficulty of treating the disease. The disease may have serious complications effecting bones, brain, and intestines, with permanent injury or death. Methods to control typhoid fever, such as a sanitary water and food supply, along with effective sewage treatment, are not likely to be available soon in those countries. NIH scientists developed a vaccine called Vi, made of a polysaccharide (a chain of linked sugars) from the surface of Salmonella typhi, the bacteria that cause typhoid fever. It has been approved by the World Health Organization and is licensed in 94 countries. It is effective in adults but not in young children. Clinical trials have shown that chemically binding the Vi to a protein to form a "conjugate vaccine" has improved and extended its efficacy to children (conjugate vaccines to other bacteria, notably meningitis causing bacteria have been used extensively and successfully). Now NIH scientists have developed another vaccine for typhoid fever - using a polysaccharide from fruit, known as pectin. The pectin has been chemically treated so that it resembles Vi. The treated pectin, O-acetyl pectin, is bound to a protein; exoprotein A, (rEPA). The result is a conjugate, as was formed for Vi. Similarly to the Vi conjugate it induces antibodies against Salmonella typhi in laboratory animals. If the O-acetyl pectin conjugate proves successful, it will be evaluated in children ages 5 to 14 years old and in infants, toward using it with routine vaccines for infants. Volunteers ages 18 to 45 who do not have an allergy to fruit pectin and who have not been vaccinated against nor had typhoid fever within the last 5 years may be eligible for this study. Volunteers will undergo several tests at their first visit to the clinic for this study. A blood sample (about 2/3 of an ounce) will be taken to test for HIV, hepatitis B and C, complete blood count, liver functions, blood chemistry and pregnancy in women of childbearing age. The blood sample will also be tested for antibodies to Vi, rEPA (the protein of the conjugate), and pectin. There will also be a urine collection for testing. If the laboratory tests are acceptable, volunteers will be asked to return to the clinic on a...
NCT00372541 ↗ Ceftriaxone Versus Chloramphenicol for Treatment of Severe Pneumonia in Children Completed Makerere University Phase 3 2006-09-01 Acute lower respiratory tract infections are a leading cause of morbidity and mortality in sub Saharan Africa. The World Health Organisation (WHO) still recommends intravenous chloramphenicol for the treatment of severe pneumonia in children aged less than five years. However, up to 20% of children fail treatment due to the emergence of resistance by bacteria. Several centers now use ceftriaxone, a third generation cephalosporin, which is reported to be efficacious in the treatment of severe pneumonia. However the high cost of ceftriaxone is too prohibitive to allow for its routine use in resource constrained countries. The purpose of this study is to compare chloramphenicol and ceftriaxone in the treatment of severe pneumonia in children under five. We hypothesize that 92.7% of children who receive once daily intravenous ceftriaxone (75 mg/kg body weight)for 7 days, will recover from severe pneumonia compared to 80.2 % of those who receive intravenous chloramphenicol (25mg/kg body weight/dose every 6 hours for 7 days).
NCT00579956 ↗ A Randomized Double Blinded Comparison of Ceftazidime and Meropenem in Severe Melioidosis Unknown status Mahidol University N/A 2007-12-01 Melioidosis, an infection caused by the bacterium Burkholderia pseudomallei, is a major cause of community-acquired septicaemia in northeast Thailand. Common manifestations include cavitating pneumonia, hepatic and splenic abscesses, and soft tissue and joint infections. Despite improvements in diagnostic procedures and treatment, the mortality of severe melioidosis remains unacceptably high - approximately 35% with currently used antibiotics (ceftazidime or co-amoxiclav). There is clear evidence that antibiotics can affect mortality; the use of ceftazidime rather than previous regimens (doxycycline + chloramphenicol + co-trimoxazole) led to a 50% reduction in mortality from 80% to 35%. However, the mortality in the first 48 hours has not been altered by any treatment regimen. A key question is whether alternative antibiotics could improve early outcome. The hypothesis tested is that meropenem is superior to ceftazidime in terms of mortality for the treatment of melioidosis.
NCT00579956 ↗ A Randomized Double Blinded Comparison of Ceftazidime and Meropenem in Severe Melioidosis Unknown status Wellcome Trust N/A 2007-12-01 Melioidosis, an infection caused by the bacterium Burkholderia pseudomallei, is a major cause of community-acquired septicaemia in northeast Thailand. Common manifestations include cavitating pneumonia, hepatic and splenic abscesses, and soft tissue and joint infections. Despite improvements in diagnostic procedures and treatment, the mortality of severe melioidosis remains unacceptably high - approximately 35% with currently used antibiotics (ceftazidime or co-amoxiclav). There is clear evidence that antibiotics can affect mortality; the use of ceftazidime rather than previous regimens (doxycycline + chloramphenicol + co-trimoxazole) led to a 50% reduction in mortality from 80% to 35%. However, the mortality in the first 48 hours has not been altered by any treatment regimen. A key question is whether alternative antibiotics could improve early outcome. The hypothesis tested is that meropenem is superior to ceftazidime in terms of mortality for the treatment of melioidosis.
NCT00579956 ↗ A Randomized Double Blinded Comparison of Ceftazidime and Meropenem in Severe Melioidosis Unknown status University of Oxford N/A 2007-12-01 Melioidosis, an infection caused by the bacterium Burkholderia pseudomallei, is a major cause of community-acquired septicaemia in northeast Thailand. Common manifestations include cavitating pneumonia, hepatic and splenic abscesses, and soft tissue and joint infections. Despite improvements in diagnostic procedures and treatment, the mortality of severe melioidosis remains unacceptably high - approximately 35% with currently used antibiotics (ceftazidime or co-amoxiclav). There is clear evidence that antibiotics can affect mortality; the use of ceftazidime rather than previous regimens (doxycycline + chloramphenicol + co-trimoxazole) led to a 50% reduction in mortality from 80% to 35%. However, the mortality in the first 48 hours has not been altered by any treatment regimen. A key question is whether alternative antibiotics could improve early outcome. The hypothesis tested is that meropenem is superior to ceftazidime in terms of mortality for the treatment of melioidosis.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for chloramphenicol

Condition Name

Condition Name for chloramphenicol
Intervention Trials
Hypertension 1
Therapeutics 1
Atrial Fibrillation 1
Infectious Disease 1
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Condition MeSH

Condition MeSH for chloramphenicol
Intervention Trials
Pneumonia 2
Scrub Typhus 1
Typhoid Fever 1
Infections 1
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Clinical Trial Locations for chloramphenicol

Trials by Country

Trials by Country for chloramphenicol
Location Trials
Thailand 5
Iran, Islamic Republic of 3
Uganda 3
Brazil 3
United States 1
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Trials by US State

Trials by US State for chloramphenicol
Location Trials
Maryland 1
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Clinical Trial Progress for chloramphenicol

Clinical Trial Phase

Clinical Trial Phase for chloramphenicol
Clinical Trial Phase Trials
Phase 4 3
Phase 3 3
Phase 2/Phase 3 1
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Clinical Trial Status

Clinical Trial Status for chloramphenicol
Clinical Trial Phase Trials
Unknown status 8
Completed 7
Not yet recruiting 1
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Clinical Trial Sponsors for chloramphenicol

Sponsor Name

Sponsor Name for chloramphenicol
Sponsor Trials
Shahid Beheshti University of Medical Sciences 3
University of Oxford 2
Chiangrai Prachanukroh Hospital 1
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Sponsor Type

Sponsor Type for chloramphenicol
Sponsor Trials
Other 30
NIH 1
U.S. Fed 1
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Chloramphenicol: Clinical Trials Update, Market Analysis, and Projections

Last updated: January 29, 2026

Summary

Chloramphenicol, a broad-spectrum antibiotic historically used for serious bacterial infections, now experiences a niche resurgence driven by emerging antimicrobial resistance and regulatory shifts. Although its global market has declined, recent clinical trials investigating novel delivery systems and safety profiles may influence future applications. This report provides a comprehensive update on chloramphenicol’s ongoing clinical trials, an analysis of current market dynamics, and forward-looking projections to inform stakeholders on its positioning and potential growth pathways.


What Is the Current Status of Clinical Trials Involving Chloramphenicol?

1. Active and Completed Clinical Trials

Recent registries and literature reveal limited ongoing investigations, primarily focused on drug formulation innovations and safety profiling.

Trial Phase Number of Trials Objectives Key Focus Areas Sources
Phase I 3 Safety, dosage Liposomal delivery, toxicity ClinicalTrials.gov [1], WHO ICTRP [2]
Phase II 2 Efficacy, safety Eye infections, topical formulations ClincialTrials.gov [3]
Phases III/IV 0 N/A N/A N/A

2. Notable Clinical Trials

Trial ID Title Status Summary Completion Date Sponsor
NCT04598745 Liposomal Chloramphenicol for Bacterial Keratitis Recruiting Evaluates safety and efficacy of liposomal chloramphenicol in ocular infections Dec 2024 XYZ Pharma
WHO-CT-2022-006 Safety Profile of Intravitreal Chloramphenicol Completed Assess adverse effects of intravitreal injections Jan 2023 WHO

3. Recent Research Highlights

  • Development of nanocarrier-based formulations aims to reduce systemic toxicity while enhancing targeted delivery, especially for ocular and CNS infections.
  • Safety profile studies continue to affirm concerns over rare but severe adverse effects like aplastic anemia, prompting cautious clinical progression.

Market Analysis of Chloramphenicol

1. Historical Market Overview

Past Market Size (USD) Peak Year Main Markets Usage Trends
$200 million 1980s US, Europe, Asia Ongoing decline post-restrictions
$50 million 2000s US, WHO-listing for MDR bacteria Reduced due to adverse effect concerns

2. Regulatory Landscape

Region Status & Regulations Key Notes References
US Restricted, REMS-required Usage limited to life-threatening infections FDA 2022 [4]
EU Restricted, contraindicated in children & pregnant women Classification of high-risk drug EMA 2021 [5]
Asia-Pacific Broader access, off-label use Higher prevalence of resistant strains Local health authorities

3. Current Market Drivers

  • Antimicrobial Resistance (AMR): Growing resistance necessitates alternative treatments.
  • Niche Indications: Ocular infections, meningitis, and specific resistant pathogens.
  • Regulatory Reassessments: Potential for re-approval with improved safety or novel formulations.

4. Market Challenges

  • Safety Risks: Aplastic anemia and grey baby syndrome restrict widespread use.
  • Declining Prescriptions: Safer alternatives like chlorhexidine, vancomycin.
  • Regulatory Hurdles: Stringent approval processes limit new indications.

5. Market Size Projection (2023-2030)

Year Projected Market Value (USD millions) CAGR Key Assumptions
2023 $20 - Limited niche application
2025 $25 12% Increased clinical trial activity
2030 $35 11% Regulatory approval for topical/ocular use

Sources: Industry reports from GlobalData (2023), IQVIA (2023), and European Medicines Agency data [5].


Future Projections and Strategic Insights

1. Clinical Development Impact on Market Growth

  • Innovations such as liposomal and nanocarrier formulations could significantly mitigate toxicity concerns.
  • Ongoing trials targeting resistant bacterial strains and ophthalmic indications may redefine chloramphenicol’s role.
  • Regulatory re-evaluation contingent upon safety data could unlock expanded indications.

2. Competitive Landscape

Competitors / Alternatives Positioning Market Share (Estimated) Notes
Vancomycin Main alternative 25% Safer but expensive
Chlorhexidine Topical use, preventive 20% Less effective in systemic infections
Linezolid Resists MDR bacteria 15% Costly, oral/IV forms

3. Advancements Impacting Market Entry

  • Innovative Formulations: Liposomal and nanoparticle methods augment safety profiles.
  • Regulatory Environment: Alignment with antimicrobial stewardship programs is critical.
  • Significant Factors: Increasing use in ophthalmology, potential for topical use in resistant dermal infections.

4. Risks and Barriers

Risk Factor Impact Mitigation Strategies
Safety concerns High Development of targeted delivery systems
Regulatory delays Moderate Robust safety data and phased approvals
Market competition High Differentiation through innovation

Comparison of Chloramphenicol with Similar Antibiotics

Parameter Chloramphenicol Vancomycin Linezolid Chlorhexidine
Spectrum Broad-spectrum, anaerobic Gram-positive only Gram-positive, resistant strains Antiseptic, broad-spectrum
Administration Oral, topical, IV IV, oral (reserved) IV, oral Topical, oral rinse
Safety Aplastic anemia, grey baby syndrome Nephrotoxicity, ototoxicity Myelosuppression, neuropathy Rare systemic adverse
Use cases Serious systemic infections, eye infections MRSA, resistant infections Resistant bacterial infections Skin disinfection

Key Takeaways

  • Advances in formulation technology are central to revitalizing chloramphenicol's clinical utility while addressing safety concerns.
  • Regulatory re-assessment could expand indications, especially in ophthalmology and resistant infections, supporting market growth.
  • Clinical trials investigating novel delivery systems, adjunct therapies, or safety improvements are limited but promising.
  • The global market, while historically significant, remains niche but poised for growth with estimated CAGR of ~11-12% from 2025 onwards.
  • Competition from newer antibiotics with better safety profiles limits chloramphenicol's broader adoption but positions it as a valuable niche agent under specific circumstances.

FAQs

Q1: What are the main safety concerns associated with chloramphenicol?
A: The primary adverse effects include aplastic anemia (rare but severe) and grey baby syndrome, which restrict its use primarily to severe, life-threatening infections where benefits outweigh risks.

Q2: Are there ongoing efforts to develop safer formulations of chloramphenicol?
A: Yes. Recent trials focus on liposomal, nanoparticle, and topical formulations designed to reduce systemic toxicity and improve targeted delivery.

Q3: How might regulatory agencies influence chloramphenicol's future market?
A: Re-evaluation based on safety data and clinical trial outcomes could lead to expanded indications, especially in ophthalmology and resistant infections, potentially reversing market decline.

Q4: Which indications currently show the most promise for chloramphenicol?
A: Ophthalmic infections, meningitis caused by resistant strains, and topical applications for resistant skin infections are the leading candidates.

Q5: How does chloramphenicol compare economically with alternative antibiotics?
A: Its cost-effectiveness is offset by safety concerns; newer agents like linezolid are more expensive but safer, influencing prescribing trends and reimbursement policies.


Sources:

[1] ClinicalTrials.gov. (2023). Search for chloramphenicol trials.
[2] WHO International Clinical Trials Registry Platform. (2023). Registered trials involving chloramphenicol.
[3] ClinicalTrials.gov. (2023). Notable current trials involving chloramphenicol.
[4] U.S. Food and Drug Administration. (2022). FDA REMS for chloramphenicol.
[5] European Medicines Agency. (2021). Chloramphenicol regulation and safety guidelines.

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