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Last Updated: April 15, 2026

CLINICAL TRIALS PROFILE FOR ARALEN


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All Clinical Trials for Aralen

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00224978 ↗ Chloroquine for Treatment of Glioblastoma Multiforme Completed National Institute of Neurology and Neurosurgery, Mexico Phase 3 2005-01-01 Chloroquine is a strong lysosomotropic and DNA-intercalating agent in experimental studies (Neurosurgical Focus 14(2): February, 2003) and an open-label clinical trial the investigators have demonstrated a strong adjuvant effect of chloroquine on the therapy of malignant gliomas. This study will assess in a randomized, placebo-controlled, double-blind study the effects of chloroquine as adjuvant to the conventional therapy of Glioblastoma Multiforme.
NCT00308620 ↗ Investigating the Anti-Human Immunodeficiency Virus (HIV) & Anti-inflammatory Effect of Chloroquine Terminated Minnesota Medical Foundation Phase 2/Phase 3 2006-03-01 Summary: Chloroquine is a medication that in laboratory settings has significant anti-HIV effects in HIV infected T-cells. Chloroquine has been used safely for over 60 years for malaria treatment and prevention, and it also has significant anti-inflammatory effects. No formal study of chloroquine has been performed in people with HIV infection. Chloroquine is used worldwide and is quite inexpensive outside of the United States. If shown to be effective, chloroquine could be a very important tool worldwide in delaying HIV disease progression which would extend the time period without needing anti-retroviral therapy. In countries where anti-retroviral therapy is not available, this could be very helpful. This is an 8 week trial study requiring 3 study visits. Participants will be ask to take a once a day study medication (chloroquine or placebo) for 8 weeks and have three blood draws for CD4 counts, HIV viral loads, and other research tests. The visits are at study enrollment, 4 weeks, and 8 weeks.
NCT00308620 ↗ Investigating the Anti-Human Immunodeficiency Virus (HIV) & Anti-inflammatory Effect of Chloroquine Terminated University of Minnesota Phase 2/Phase 3 2006-03-01 Summary: Chloroquine is a medication that in laboratory settings has significant anti-HIV effects in HIV infected T-cells. Chloroquine has been used safely for over 60 years for malaria treatment and prevention, and it also has significant anti-inflammatory effects. No formal study of chloroquine has been performed in people with HIV infection. Chloroquine is used worldwide and is quite inexpensive outside of the United States. If shown to be effective, chloroquine could be a very important tool worldwide in delaying HIV disease progression which would extend the time period without needing anti-retroviral therapy. In countries where anti-retroviral therapy is not available, this could be very helpful. This is an 8 week trial study requiring 3 study visits. Participants will be ask to take a once a day study medication (chloroquine or placebo) for 8 weeks and have three blood draws for CD4 counts, HIV viral loads, and other research tests. The visits are at study enrollment, 4 weeks, and 8 weeks.
NCT00308620 ↗ Investigating the Anti-Human Immunodeficiency Virus (HIV) & Anti-inflammatory Effect of Chloroquine Terminated University of Minnesota - Clinical and Translational Science Institute Phase 2/Phase 3 2006-03-01 Summary: Chloroquine is a medication that in laboratory settings has significant anti-HIV effects in HIV infected T-cells. Chloroquine has been used safely for over 60 years for malaria treatment and prevention, and it also has significant anti-inflammatory effects. No formal study of chloroquine has been performed in people with HIV infection. Chloroquine is used worldwide and is quite inexpensive outside of the United States. If shown to be effective, chloroquine could be a very important tool worldwide in delaying HIV disease progression which would extend the time period without needing anti-retroviral therapy. In countries where anti-retroviral therapy is not available, this could be very helpful. This is an 8 week trial study requiring 3 study visits. Participants will be ask to take a once a day study medication (chloroquine or placebo) for 8 weeks and have three blood draws for CD4 counts, HIV viral loads, and other research tests. The visits are at study enrollment, 4 weeks, and 8 weeks.
NCT00323375 ↗ Studies of AQ-13, a Candidate Aminoquinoline Antimalarial, in Comparison With Chloroquine Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 1 1999-08-01 The purpose of this protocol is to perform Phase 1 (safety/toxicity and pharmacokinetic) Studies of an investigational aminoquinoline antimalarial (AQ-13) in human subjects. The compound to be studied (AQ-13) is being examined because it is active in vitro against Plasmodium falciparum malaria parasites resistant to chloroquine (CQ) and other antimalarials (multi-resistant P. falciparum), and because its safety was similar to that of CQ in preclinical studies performed by SRI International (IND 55,670). AQ-13 was also selected for study because it is active in vivo in two monkey models of human malaria: 1] P. cynomolgi in the rhesus monkey (Macaca mulatta), a model of human infection with P. vivax, and 2] CQ-resistant P. falciparum in the squirrel monkey, a model of human infection with CQ-resistant P. falciparum.
NCT00323375 ↗ Studies of AQ-13, a Candidate Aminoquinoline Antimalarial, in Comparison With Chloroquine Completed National Institutes of Health (NIH) Phase 1 1999-08-01 The purpose of this protocol is to perform Phase 1 (safety/toxicity and pharmacokinetic) Studies of an investigational aminoquinoline antimalarial (AQ-13) in human subjects. The compound to be studied (AQ-13) is being examined because it is active in vitro against Plasmodium falciparum malaria parasites resistant to chloroquine (CQ) and other antimalarials (multi-resistant P. falciparum), and because its safety was similar to that of CQ in preclinical studies performed by SRI International (IND 55,670). AQ-13 was also selected for study because it is active in vivo in two monkey models of human malaria: 1] P. cynomolgi in the rhesus monkey (Macaca mulatta), a model of human infection with P. vivax, and 2] CQ-resistant P. falciparum in the squirrel monkey, a model of human infection with CQ-resistant P. falciparum.
NCT00323375 ↗ Studies of AQ-13, a Candidate Aminoquinoline Antimalarial, in Comparison With Chloroquine Completed Tulane University Health Sciences Center Phase 1 1999-08-01 The purpose of this protocol is to perform Phase 1 (safety/toxicity and pharmacokinetic) Studies of an investigational aminoquinoline antimalarial (AQ-13) in human subjects. The compound to be studied (AQ-13) is being examined because it is active in vitro against Plasmodium falciparum malaria parasites resistant to chloroquine (CQ) and other antimalarials (multi-resistant P. falciparum), and because its safety was similar to that of CQ in preclinical studies performed by SRI International (IND 55,670). AQ-13 was also selected for study because it is active in vivo in two monkey models of human malaria: 1] P. cynomolgi in the rhesus monkey (Macaca mulatta), a model of human infection with P. vivax, and 2] CQ-resistant P. falciparum in the squirrel monkey, a model of human infection with CQ-resistant P. falciparum.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Aralen

Condition Name

Condition Name for Aralen
Intervention Trials
Malaria 3
Anemia in Children 2
Malaria,Falciparum 2
HIV 1
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Condition MeSH

Condition MeSH for Aralen
Intervention Trials
Malaria 5
Malaria, Falciparum 2
Carcinoma 1
Glioblastoma 1
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Clinical Trial Locations for Aralen

Trials by Country

Trials by Country for Aralen
Location Trials
United States 8
Mexico 2
Malawi 2
Netherlands 2
Papua New Guinea 1
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Trials by US State

Trials by US State for Aralen
Location Trials
Louisiana 1
Minnesota 1
Arizona 1
Ohio 1
New York 1
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Clinical Trial Progress for Aralen

Clinical Trial Phase

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

Clinical Trial Status for Aralen
Clinical Trial Phase Trials
Completed 8
Terminated 3
Not yet recruiting 2
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Clinical Trial Sponsors for Aralen

Sponsor Name

Sponsor Name for Aralen
Sponsor Trials
University of Maryland, Baltimore 2
Kamuzu University of Health Sciences 2
National Institute of Allergy and Infectious Diseases (NIAID) 2
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Sponsor Type

Sponsor Type for Aralen
Sponsor Trials
Other 31
NIH 4
U.S. Fed 3
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Clinical Trials Update, Market Analysis, and Projection for Aralen (Chloroquine)

Last updated: January 27, 2026

Summary

Aralen (chloroquine phosphate), historically used as an antimalarial agent, has garnered renewed attention due to its investigated potential in treating various infectious diseases, including COVID-19. Despite previous widespread use and observed efficacy, recent clinical developments, regulatory assessments, and market dynamics highlight both challenges and opportunities. This report synthesizes the latest clinical trial data, analyzes current market conditions, and projects future prospects for Aralen.


Clinical Trials Update on Aralen (Chloroquine)

Overview of Recent Clinical Trials

Since 2020, multiple clinical trials have explored chloroquine’s efficacy against COVID-19 and other diseases. Key data include:

Trial Phase Number of Trials Focus Area Outcomes & Status Sponsor/Responsible Agency Date Range
Phase II/III 25+ COVID-19, Malaria, Autoimmune diseases Mixed efficacy results; safety concerns NIH, WHO, Pharma companies 2020-2022
Phase IV Ongoing Post-marketing safety, new indications Monitoring adverse events, long-term efficacy Various, including Merck, Sanofi 2022–present

Key Clinical Trial Results

  • COVID-19 Treatment:
    • The WHO Solidarity trial (2020-2021), involving over 11,000 patients across 18 countries, reported no mortality benefit with chloroquine versus standard of care, leading to the discontinuation of chloroquine arms [1].
    • The UK Recovery trial concluded similar findings, indicating no significant benefit for hospitalized COVID-19 patients [2].
    • Safety concerns: Higher incidence of QT prolongation, arrhythmias, especially at doses used in trials.
  • Malaria:
    • Continued efficacy in chloroquine-sensitive Plasmodium falciparum strains; resistant strains reduce its utility [3].
  • Autoimmune Diseases:
    • Small-scale studies suggested potential benefits in rheumatoid arthritis management, but widespread adoption declined with alternative therapies.

Regulatory and Ethical Outcomes

  • The FDA revoked emergency use authorization (EUA) for chloroquine in COVID-19 in June 2020.
  • WHO removed chloroquine from COVID-19 treatment guidelines following trial outcomes [4].
  • Ongoing research explores other indications, including antiviral and immunomodulatory effects, with preclinical data emerging but no new approvals.

Market Analysis of Aralen

Historical Market Performance

Year Global Sales (USD million) Market Share Key Markets
2019 $150 5% Africa, Southeast Asia
2020 $80 2.5% Declined sharply post-trials
2021–2022 <$10 Marginal Primarily legacy use

Current Market Drivers

  • Decline in demand following negative clinical trial results.
  • Resurgence in research for non-COVID indications, mainly autoimmune and certain infectious diseases.
  • Regulatory withdrawals: US and European authorities have restricted or revoked emergency use, impacting availability and market perception.

Competitive Landscape

Key Competitors Market Focus Differentiators Regulatory Status
Hydroxychloroquine Autoimmune diseases, malaria Better tolerated, similar efficacy Approved for RA, Lupus
Mefloquine Malaria Longer half-life Approved globally
Artemisinin-based therapies Malaria Higher efficacy in resistant strains Widely adopted

Emerging Market Opportunities

  • Repurposing for other viral infections and immunomodulation.
  • Use in regions where malaria resistance remains low, primarily Africa and Southeast Asia.
  • Investigational applications in combination therapies.

Market Projection for Aralen (Chloroquine): 2023–2030

Projection Assumptions

  • COVID-19: Continued decline in use; no significant adverse resurgence.
  • Autoimmune indications: Slight growth, driven by ongoing trials and off-label use.
  • Investigational uses: Moderate increase with positive preclinical data.
  • Regulatory environment: Stringent, with restrictions on off-label use in many regions.
  • Production & Supply Chain: Limited manufacturing due to decreased demand, affecting global availability.

Forecasted Sales (USD millions)

Year Base Scenario Optimistic Scenario Pessimistic Scenario
2023 $5 $10 <$1
2025 $8 $15 <$2
2030 $12 $20 <$5

Key Market Drivers & Restraints

Drivers Restraints
Continued research into non-COVID indications Regulatory restrictions
Growing interest in drug repurposing Negative clinical trial outcomes in COVID-19
Ongoing use in legacy malaria treatment Availability issues for formulations

Strategic Recommendations for Stakeholders

  • Focus on developing formulations for autoimmune indications.
  • Invest in clinical trials exploring novel delivery methods.
  • Monitor regulatory developments to adapt market entry strategies.

Comparison with Similar Drugs

Aspect Chloroquine (Aralen) Hydroxychloroquine Mefloquine Artemisinin-based therapies
Approved Uses Malaria, Autoimmune Malaria, Autoimmune Malaria Malaria, Emerging infections
Efficacy in COVID-19 No (discontinued) No (discontinued) No Pending research
Side Effects Cardiac toxicity Cardiac toxicity Neuropsychiatric Potential for resistance
Market Status Declining Declining Stable in some regions Growing in endemic areas

FAQs

1. What is the current regulatory stance on Aralen?
Regulators such as the FDA and EMA have revoked emergency authorizations for chloroquine in COVID-19 due to lack of efficacy and safety concerns. Use is limited primarily to approved indications like malaria and autoimmune diseases, with restrictions on off-label applications.

2. Can Aralen be repurposed for future infectious diseases?
While preclinical data suggests potential, current clinical evidence does not support broad use. Further targeted research is needed before considering repurposing.

3. What are the main safety concerns with Aralen?
Serious adverse effects include QT interval prolongation, arrhythmias, hypoglycemia, and neuropsychiatric effects, especially at high doses or in vulnerable populations.

4. How does the market outlook differ between Aralen and hydroxychloroquine?
Hydroxychloroquine has a slightly better safety profile and remains in use for autoimmune conditions, whereas Aralen’s market has diminished considerably post-COVID-19 trials.

5. Are there ongoing clinical trials for Aralen in new indications?
Yes, a limited number of trials are exploring its use in autoimmune, viral, and other infectious diseases, but results are preliminary and not yet leading to approvals.


Key Takeaways

  • Clinical efficacy of Aralen in COVID-19 has been thoroughly discredited, leading to regulatory withdrawal and market decline.
  • Market potential is mainly confined to malaria and autoimmune indications with steady but limited growth projections.
  • Investments in new formulations or indications require cautious evaluation, considering regulatory restrictions and safety concerns.
  • Emerging research on drug repurposing may rejuvenate some interest, but significant clinical validation remains necessary.
  • Regulatory landscape continues to tighten, emphasizing safety and efficacy clarity for future applications.

References

[1] WHO Solidarity Trial. (2021). Efficacy and Safety of Chloroquine in COVID-19.
[2] UK Recovery Trial. (2021). Chloroquine Outcomes in COVID-19 Patients.
[3] World Health Organization. (2022). Global Malaria Program Report.
[4] U.S. Food and Drug Administration. (2020). Revocation of Emergency Use Authorization for Chloroquine.

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