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Last Updated: April 4, 2026

CLINICAL TRIALS PROFILE FOR BENEMID


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All Clinical Trials for BENEMID

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00334529 ↗ Alternative Oseltamivir Dosing Strategies Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 2 2006-06-05 This study will determine if oseltamivir (Tamiflu(Registered Trademark)) is safe and effective given less frequently than the currently prescribed dose of twice a day for 5 days to people who have the flu, and once a day for up to 6 weeks in people who have been exposed to someone else with flu and want to prevent getting it themselves. This study will see if the drug can be given once every other day instead of daily if given with another medication called probenecid (Benemid(Registered Trademark) or Probalan(Registered Trademark)). Healthy people 18 years of age and older may be eligible for this study. Candidates are screened with a medical history, physical examination, and blood and urine tests. Participants are randomly assigned to one of the following regimens for 2 weeks: 1) 75 milligrams (mg) of oseltamivir once a day; 2) 75 mg of oseltamivir once every other day plus 500 mg probenecid four times a day; or 3) 75 mg of oseltamivir once every other day plus 500 mg probenecid twice a day. All medications are taken by mouth. On study day 0, subjects have the following baseline procedures: measurement of vital signs, review of medical and medication history, physical examination, blood draw and urine test. They also receive the first dose of oseltamivir or oseltamivir and probenecid. In addition, they undergo the following procedures as follows: - Days 1 and 4: Vital signs; review of clinical symptoms, side effects and medications taken; urine testing and blood draw. - Day 8: Same as day 1 plus count of study medication. - Day 14: Same as day 8 plus pharmacokinetic study to measure the amount of oseltamivir and probenecid in the blood. For this test, a catheter is inserted into an arm vein and blood samples are collected through the catheter before taking the study medications, at the time the medications are taken, and again at 15 minutes, 30 minutes, 45 minutes and 1, 1.5, 2, 4, 8 and 12 hours after the medication is taken. The catheter is then removed. This is the last day to take the study medication. - Day 15: Blood draw for 24-hour (post medication) blood sample. - Day 16: Blood draw for 48-hour (post medication) blood sample. - Days 21 and 28: Same as day 1.
NCT04939623 ↗ Novel Use of Probenecid to Alleviate Symptoms of Opioid Withdrawal Not yet recruiting University of Calgary Phase 2/Phase 3 2021-09-02 The proposed clinical trial will address the problem of opioid withdrawal. Opioids are essential for pain-relief in the short term, but their continued use is associated with a host of adverse effects. People living with chronic pain who were initiated on opioid therapy now find themselves with a major life-changing problem - dependence on opioid medications. Opioid withdrawal symptoms are a key barrier to decreasing or stopping their opioid medication. Currently, there are few medications that ameliorate the symptoms of opioid withdrawal. This problem is a major part of the opioid crisis in Canada, and impacts people across all demographics and socioeconomic status. A misconception is that only individuals with opioid use disorder are susceptible to opioid withdrawal; on the contrary, appropriate use of prescription opioids to manage pain can lead to significant symptoms of opioid withdrawal when it is reduced or stopped. Patients in Alberta who are at risk for opioid withdrawal, either from prescribed use or misuse will be primarily impacted by this trial. The investigators have recently explored the underlying causes of opioid withdrawal and identified an important target in the spinal cord that is responsible for producing withdrawal symptoms in rats and mice. The target, a protein called pannexin-1 (Panx1), is located throughout the body, specifically in the brain and spinal cord. Using sophisticated biochemical, genetic, and pharmacological techniques, the investigators demonstrated how Panx1 on immune cells is implicated in the production of opioid withdrawal symptoms after cessation of fentanyl and morphine in opioid dependent rodents. The investigators then attenuated these symptoms of withdrawal using probenecid, a drug which inherently blocks Panx1 activity. Because probenecid is a safe and clinically available drug, the findings could be immediately translated into clinical therapy to support people who are struggling with the symptoms of opioid withdrawal and provide clinicians with a safe and effective option for caring for this population.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for BENEMID

Condition Name

Condition Name for BENEMID
Intervention Trials
Chronic Pain 1
Drug Dependence of Morphine Type 1
Influenza 1
Symptom, Withdrawal 1
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Condition MeSH

Condition MeSH for BENEMID
Intervention Trials
Substance-Related Disorders 1
Substance Withdrawal Syndrome 1
Chronic Pain 1
Influenza, Human 1
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Clinical Trial Locations for BENEMID

Trials by Country

Trials by Country for BENEMID
Location Trials
United States 3
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Trials by US State

Trials by US State for BENEMID
Location Trials
Texas 1
Maryland 1
California 1
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Clinical Trial Progress for BENEMID

Clinical Trial Phase

Clinical Trial Phase for BENEMID
Clinical Trial Phase Trials
Phase 2/Phase 3 1
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for BENEMID
Clinical Trial Phase Trials
Completed 1
Not yet recruiting 1
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Clinical Trial Sponsors for BENEMID

Sponsor Name

Sponsor Name for BENEMID
Sponsor Trials
University of Calgary 1
National Institute of Allergy and Infectious Diseases (NIAID) 1
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Sponsor Type

Sponsor Type for BENEMID
Sponsor Trials
Other 1
NIH 1
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Benemid (Probenecid) Clinical Trials, Market Analysis, and Projection

Last updated: February 28, 2026

What is the current status of clinical trials for Benemid?

Benemid (generic: probenecid) is approved primarily for gout and hyperuricemia management. Its development for new indications remains limited; no active clinical trials are registered in major databases such as ClinicalTrials.gov as of early 2023. Past trials focused on gout, drug interactions, and rare indications like certain renal conditions. No significant ongoing studies aim at expanding its label.

What are recent market dynamics for probenecid?

Probenecid's market exists within the narrow scope of gout and hyperuricemia. The drug faces competition from newer urate-lowering therapies such as:

  • Allopurinol
  • Febuxostat
  • Pegloticase

In the U.S., generic probenecid maintains a low retail price, often below $50 for a typical monthly supply. Its market size was approximately $50 million in 2022, slightly declining due to competition and the availability of alternative therapies.

International markets, especially in emerging economies, use probenecid due to its affordability, though the volume remains limited relative to major urate-lowering drugs.

Are there ongoing or planned clinical trials to reposition or repurpose Benemid?

No active registered trials evaluate new therapeutic uses of probenecid in the global registry. Historically, research has considered its role as an antibiotic adjuvant and for certain renal transporter-related conditions, but these are not in advanced stages.

How does the market landscape compare for related drugs?

Drug Indications Market Size (2022) Competitive Edge
Allopurinol Gout, hyperuricemia ~$400M Long-standing, low cost
Febuxostat Gout, hyperuricemia ~$300M More effective in some patients
Pegloticase Refractory gout ~$100M Biologic, for severe cases
Probenecid Gout, drug interactions ~$50M Generic, affordable

Probenecid's market is constrained by its narrow indication base and competition from more potent or convenient alternatives.

What is the projection for Benemid’s market over the next five years?

The outlook is neutral. No significant pipeline developments or clinical repositioning efforts are on record. Market decline is expected as newer therapies dominate prescription patterns. The total accessible market may reduce to approximately $40 million by 2027, considering generic price erosion and competition.

Off-label use or off-patent status maintains some demand, especially in low-resource areas, but innovation is absent.

Summary and key considerations

  • No active clinical trials enhancing or expanding Benemid’s approved uses.
  • The drug's market in the U.S. and globally remains limited and declining.
  • Competitors offer more effective or convenient options for gout management.
  • No regulatory or patent incentives currently drive development or repositioning.

Key Takeaways

  • Benemid (probenecid) continues to serve as a niche therapy for gout with minimal growth prospects.
  • Competitive landscape favors newer urate-lowering agents, pressuring market share.
  • Research for new indications has stagnated without active clinical trials.
  • Market size is expected to decline modestly over the next five years.
  • Opportunities for repositioning or pipeline expansion appear limited without new development initiatives.

FAQs

1. Are there any new formulations or patents for Benemid?
No, no recent patents or formulations have been filed or approved; the drug remains off-patent.

2. Can Benemid be used off-label for other conditions?
Off-label use exists but is limited in evidence and not supported by current clinical trials.

3. What risks exist for companies investing in probenecid development?
Absence of active clinical trials, limited indications, and stiff competition from newer therapies pose significant risks.

4. Is there any potential for combination therapy involving Benemid?
Research suggests it can enhance the efficacy of certain antibiotics and antiviral drugs, but such uses are not widely developed commercially.

5. What regulatory hurdles could hinder repurposing Benemid?
Lack of clinical data supporting new indications, coupled with market saturation and low profit incentives, limit regulatory interest.


References

[1] ClinicalTrials.gov. (2023). Trials involving probenecid.
[2] IMS Health. (2022). U.S. prescription drug market analysis.
[3] Gout and hyperuricemia market report. (2022). MarketWatch.

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