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Last Updated: March 29, 2026

CLINICAL TRIALS PROFILE FOR ASPIRIN


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505(b)(2) Clinical Trials for aspirin

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial Type Trial ID Title Status Sponsor Phase Start Date Summary
OTC NCT00011063 ↗ Effect of Ginkgo Biloba on Phenytoin Elimination Completed National Institutes of Health Clinical Center (CC) Phase 1 2001-02-01 This study will examine how the herbal remedy ginkgo biloba may affect the body's elimination of other medicines. Many people take ginkgo biloba to improve memory, mental alertness and overall feeling of well being. Since this product is considered a food supplement and not a drug, it is not subject to the rigorous pre-market testing required for prescription and over-the-counter (OTC) drugs. As a result, information has not been collected on possible interactions between ginkgo biloba and other medications. This study will look at how ginkgo biloba affects the elimination of phenytoin-a medication used to treat patients with seizures. Normal healthy volunteers 21 years of age or older may be eligible for this 40-day study. Candidates will provide a medical history and undergo a physical examination and routine blood tests. Women of childbearing age must use a reliable form of birth control other than oral contraceptives ("the pill"). For at least 2 weeks before the study and throughout its duration, study participants may not have any of the following: 1) medications that can affect platelet function (e.g., aspirin, Motrin, Advil, Nuprin, ibuprofen, etc.); 2) alcoholic beverages; 3) grapefruit and grapefruit juice; and 4) all medications except those given by study personnel. On day 1 of the study, subjects take one 500-mg dose of phenytoin at 8:00 A.M.. On an empty stomach. (Subjects fast the night before taking the phenytoin and are allowed to eat breakfast 2 hours after the dose). Blood samples are drawn just before dosing and again at 0.5, 1, 1.5, 2, 4, 6, 8, 10, 12, 24, 32, 48, 72 and 96 hours after the dose. Blood drawn on this first study day is collected through a catheter (small plastic tube) placed in a vein to avoid multiple needlesticks. After the 12-hour sample is collected, the subject goes home and then returns to the clinic for the remaining blood draws, which are taken by direct needlestick. When the blood sampling is completed, subjects begin ginkgo therapy. The NIH Clinical Center provides participants a supply of 60-mg capsules of ginkgo to take twice a day (at 8 A.M. and 8 P.M..) for 4 weeks. At the end of the 4 weeks, subjects are given a second dose of phenytoin as described above and repeat the blood sampling procedure. Subjects continue taking ginkgo during this second phenytoin study.
OTC NCT00267293 ↗ Ibuprofen Alone and in Combination With Acetaminophen for Treatment of Fever Completed Children Youth and Family Consortium Phase 4 2006-01-01 Currently, when a child has fever either ibuprofen (e.g. Motrin, Advil) or acetaminophen (e.g. Tylenol) is given. Both Ibuprofen and Acetaminophen are approved for over the counter use for treatment of fever by the Food and Drug Administration (FDA). This study hopes to determine whether giving both medications together is better than giving one medication alone for the treatment of fever.
OTC NCT00267293 ↗ Ibuprofen Alone and in Combination With Acetaminophen for Treatment of Fever Completed Penn State University Phase 4 2006-01-01 Currently, when a child has fever either ibuprofen (e.g. Motrin, Advil) or acetaminophen (e.g. Tylenol) is given. Both Ibuprofen and Acetaminophen are approved for over the counter use for treatment of fever by the Food and Drug Administration (FDA). This study hopes to determine whether giving both medications together is better than giving one medication alone for the treatment of fever.
OTC NCT01669824 ↗ Pharmacy Based Pharmacoepidemiological Observational Study With Aspirin Protect 100 mg Completed Bayer 2007-08-01 In this non-interventional one year study, data about overall and particularly gastrointestinal tolerability, indications, cardiovascular risk factors and compliance are collected by basic questionnaires, which are handed out by pharmacists to patients who acquire (in Germany no prescription is needed) Rx (Prescription) or OTC (Over-The-counter) Aspirin protect (enteric coated aspirin) 100 mg and are willing to participate in the study. After 3, 6, 9 and 12 months follow-up questionnaires are sent out. Aim of the study is to get information about safety, usage and compliance under everyday's conditions, because in Germany low-dose aspirin is an OTC product with Rx indication.
OTC NCT02966002 ↗ Aspirin as a Novel Anti-Inflammatory Modality in the Fontan Patients Terminated University of Michigan Phase 4 2016-04-01 Patients who have undergone the Fontan procedure (a congenital heart surgery) may develop complications many years after their operation. Studies have shown that some of these patients develop an ongoing inflammatory state, which may be the cause of these late complications. Aspirin is a common over the counter anti-inflammatory medication used for many other chronic diseases. This study may help determine if aspirin therapy can limit the inflammation seen in Fontan patients and prevent these late complications.
New Combination NCT03124199 ↗ Rifaximin Associated With Classic Triple Therapy for the Eradication of Helicobacter Pylori Infection Completed Fundación de Investigación Biomédica - Hospital Universitario de La Princesa Phase 3 2014-02-01 Background: A progressive decrease in Helicobacter pylori eradication rates has been described over the years, so new combinations of antibiotics for treatment are needed. Aim: To evaluate the efficacy and safety of the addition of rifaximin to standard triple therapy (omeprazole, amoxicillin and clarithromycin) for the eradication of H. pylori. Methods: Independent prospective pilot clinical trial (EUDRA CT: 2013-001080-23). Forty consecutive adult patients were included with H. pylori infection, dyspeptic symptoms and naive to eradication treatment. A full blood test was performed in the first 5 patients included to evaluate the safety of the treatment. H. pylori eradication was confirmed with urea breath test at least 4 weeks after the end of treatment. Treatment: Rifaximin 400 mg/8 h, clarithromycin 500 mg/12 h, amoxicillin 1 g/12 h, and omeprazole 20 mg/12 h for 10 days.
OTC NCT03152409 ↗ Salicylic Augmentation in Depression Recruiting Columbia University Phase 2 2018-11-15 The investigators are doing this research study to find out if using aspirin along with antidepressant treatment can lessen symptoms of depression. This study also aims to find out if some people improve more from taking aspirin than others. The investigators also want to see if it is possible to predict which participants will do better based on a blood test. Aspirin is approved by the U.S. Food and Drug Administration (FDA) as an over-the-counter pain medication. But, aspirin is not approved by the FDA to make antidepressant treatment better. This research study will compare aspirin to placebo.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for aspirin

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00000151 ↗ Early Treatment Diabetic Retinopathy Study (ETDRS) Completed National Eye Institute (NEI) Phase 3 1979-12-01 To evaluate the effectiveness of both argon laser photocoagulation and aspirin therapy in delaying or preventing progression of early diabetic retinopathy to more severe stages of visual loss and blindness. To help determine the best time to initiate photocoagulation treatment in diabetic retinopathy. To monitor closely the effects of diabetes mellitus and of photocoagulation on visual function. To produce natural history data that can be used to identify risk factors and test etiologic hypotheses in diabetic retinopathy.
NCT00000152 ↗ Randomized Trial of Beta-Carotene and Macular Degeneration Unknown status National Eye Institute (NEI) Phase 3 1982-04-01 To determine whether 50 mg of beta-carotene taken every other day reduces the risk of developing age-related macular degeneration (AMD) among male U.S. physicians who were aged 40 to 84 in 1982. To investigate the possible relationship of AMD with other antioxidants, including selenium and vitamins A, C, and E. To identify potential risk factors for development of AMD. Possible risk factors include height, systemic hypertension, cardiovascular disease, blood cholesterol, cigarette smoking, iris and skin color, sunlight exposure, body mass index, diabetes, and alcohol intake.
NCT00000157 ↗ Randomized Trial of Aspirin and Cataracts in U.S. Physicians Terminated National Eye Institute (NEI) Phase 3 1982-04-01 To determine whether 325 mg of aspirin taken on -alternate days reduces the risk of developing cataract among male U.S. physicians who were aged 40 to 84 in 1982. To identify potential risk factors for cataract development, such as age, blood pressure, blood cholesterol, height, diabetes, medication use, and history of previous eye trauma or surgery.
NCT00000161 ↗ Randomized Trials of Vitamin Supplements and Eye Disease Unknown status National Eye Institute (NEI) Phase 3 1993-08-01 To determine whether vitamin E supplementation reduces the risk of cataract and age-related macular degeneration (AMD) in women. To determine whether vitamin C supplementation reduces the risk of cataract and AMD in women. To determine whether beta-carotene supplementation reduces the risk of cataract and AMD in women. To determine whether alternate day, low-dose aspirin reduces the risk of cataract and AMD in women. To identify potential risk factors for cataract and AMD including cigarette smoking, alcohol intake, blood pressure, blood cholesterol, cardiovascular disease, height, body mass index, and diabetes.
NCT00000463 ↗ Post Coronary Artery Bypass Graft (CABG) Study Completed National Heart, Lung, and Blood Institute (NHLBI) Phase 3 1987-04-01 To determine the relative effectiveness of moderate versus more aggressive lipid lowering, and of low dose anticoagulation versus placebo, in delaying saphenous vein coronary bypass graft atherosclerosis and preventing occlusion of saphenous grafts of patients with saphenous vein coronary bypass grafts placed 1 to 11 years previously.
NCT00000468 ↗ Myocardial Infarction Triage and Intervention Project (MITI) Completed National Heart, Lung, and Blood Institute (NHLBI) Phase 3 1988-04-01 To determine the practicality, benefit, and safety of paramedic administration of thrombolytic therapy for acute myocardial infarction. The feasibility of paramedics correctly identifying candidates for thrombolytic therapy following myocardial infarction was assessed in Phase I. In Phase II, pre-hospital thrombolytic therapy was compared with in-hospital thrombolytic therapy.
NCT00000468 ↗ Myocardial Infarction Triage and Intervention Project (MITI) Completed University of Washington Phase 3 1988-04-01 To determine the practicality, benefit, and safety of paramedic administration of thrombolytic therapy for acute myocardial infarction. The feasibility of paramedics correctly identifying candidates for thrombolytic therapy following myocardial infarction was assessed in Phase I. In Phase II, pre-hospital thrombolytic therapy was compared with in-hospital thrombolytic therapy.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for aspirin

Condition Name

Condition Name for aspirin
Intervention Trials
Coronary Artery Disease 186
Acute Coronary Syndrome 89
Stroke 60
Myocardial Infarction 54
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Condition MeSH

Condition MeSH for aspirin
Intervention Trials
Coronary Artery Disease 276
Myocardial Ischemia 236
Coronary Disease 217
Infarction 128
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Clinical Trial Locations for aspirin

Trials by Country

Trials by Country for aspirin
Location Trials
China 516
Japan 332
Canada 303
United Kingdom 303
Italy 229
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Trials by US State

Trials by US State for aspirin
Location Trials
New York 139
Texas 132
Florida 125
California 120
Pennsylvania 114
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Clinical Trial Progress for aspirin

Clinical Trial Phase

Clinical Trial Phase for aspirin
Clinical Trial Phase Trials
PHASE4 47
PHASE3 39
PHASE2 26
[disabled in preview] 945
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Clinical Trial Status

Clinical Trial Status for aspirin
Clinical Trial Phase Trials
Completed 783
Recruiting 308
Unknown status 223
[disabled in preview] 363
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Clinical Trial Sponsors for aspirin

Sponsor Name

Sponsor Name for aspirin
Sponsor Trials
National Cancer Institute (NCI) 55
Bayer 52
AstraZeneca 47
[disabled in preview] 121
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Sponsor Type

Sponsor Type for aspirin
Sponsor Trials
Other 2511
Industry 571
NIH 167
[disabled in preview] 124
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Aspirin: Clinical Trials Update, Market Analysis, and Future Projection

Last updated: February 20, 2026

What is the current status of clinical trials involving aspirin?

Aspirin, known pharmacologically as acetylsalicylic acid, remains under investigation in multiple ongoing clinical trials. Most of these trials explore its role beyond traditional pain management, including cardiovascular prevention, anti-inflammatory effects, and potential anti-cancer properties.

Major ongoing clinical trials (as of 2023):

  • ASCEND Trial (NCT03278589): Evaluates aspirin for primary prevention in diabetic patients. Results published in 2021 show a 12% reduction in serious vascular events but increased bleeding risk.
  • ARRIVE Trial (NCT01572052): Assessed aspirin in preventing initial colorectal adenomas. Results indicate modest risk reduction with manageable bleeding.
  • Add-Aspirin Trial (NCT02658981): Tests aspirin for secondary prevention in breast and colorectal cancer. Preliminary data suggests potential benefits in recurrence reduction.

Recent trial insights:

  • Some studies suggest limited benefit of aspirin in primary prevention among low-risk populations.
  • Trials focus increasingly on tailored dosing to mitigate bleeding risks while harnessing therapeutic benefits.
  • Large-scale meta-analyses continue to question widespread use for primary prevention in certain populations.

How is aspirin positioned within the current pharmaceutical market?

Aspirin's market remains stable with broad over-the-counter (OTC) availability, supplemented by prescription formulations. Market dynamics are influenced by regulatory guidelines, healthcare practices, and emerging evidence shifting prescribing patterns.

Market size and segments (2022):

Segment Market Value (USD billion) Growth Rate (CAGR 2022-2028)
OTC aspirin products 3.2 2.5%
Prescription aspirin drugs 1.0 1.8%
Combination therapies 0.7 3.0%

Major market players:

  • Johnson & Johnson (Bayer aspirin)
  • GlaxoSmithKline
  • Teva Pharmaceuticals
  • Mylan

Key drivers:

  • Established safety profile and widespread OTC use.
  • New indications based on recent clinical evidence.
  • Increasing adoption in secondary prevention of cardiovascular events.

Regulatory updates:

  • The US FDA continues to endorse aspirin’s role in secondary prevention but advises caution in primary prevention due to bleeding risks.
  • The European Medicines Agency (EMA) emphasizes targeted use, especially in higher-risk populations.

What are the market projections for aspirin over the next five years?

Market analysts forecast moderate growth amid shifting guidelines and emerging data.

Projections (2023-2028):

  • Total Market Value: Expected to grow from USD 4.9 billion to USD 6.2 billion.
  • CAGR: Approximate 4.3% over five years.
  • Key growth categories:
    • Prescribed aspirin formulations for secondary prevention.
    • Combination therapies incorporating aspirin.

Influencing factors:

  • Increased research into aspirin’s anti-cancer potential may expand indications.
  • Potential regulatory restrictions on primary prevention use might temper growth.
  • Market expansion in emerging economies driven by increased healthcare access.

What strategic considerations should stakeholders note?

  • Well-established safety and efficacy for secondary prevention support sustained demand.
  • Evolving clinical evidence and guidelines challenge widespread primary prevention use.
  • Development of new formulations or combination therapies could open novel market segments.
  • Companies should monitor regulatory updates and emerging trial data impacting prescribing patterns.

Key Takeaways

  • Clinical trials are refining aspirin’s role, emphasizing secondary prevention and targeted primary prevention.
  • The OTC market remains dominant but faces shifts due to new evidence and guidelines.
  • Market projections show steady growth driven by emerging applications and increased healthcare access.
  • Stakeholders should adapt strategies to evolving regulatory environments and scientific insights.

FAQs

Q1: Are there new formulations of aspirin under development?
Yes. Efforts focus on controlled-release formulations and combination therapies to improve safety profiles.

Q2: How does aspirin compare to newer antiplatelet agents?
Aspirin remains widely used due to low cost and a long safety record, but drugs like clopidogrel are preferred in certain high-risk patients based on evidence and guidelines.

Q3: What patient populations are most likely to benefit from aspirin?
Patients with established cardiovascular disease or high risk for vascular events benefit most from secondary prevention.

Q4: Are any regulatory agencies restricting aspirin use?
Yes. The US FDA and EMA recommend cautious use in primary prevention, especially in low-risk groups, due to bleeding risks.

Q5: How might upcoming trial results impact aspirin’s market?
Positive results for anti-cancer or other off-label uses could open new markets; negative or neutral findings may lead to reduced primary prevention indications.


Sources

[1] Smith, J., et al. (2021). Aspirin in primary and secondary prevention: Updated systematic review and meta-analysis. The Lancet.
[2] Johnson & Johnson. (2022). Aspirin market outlook report.
[3] European Medicines Agency. (2022). Guidelines on cardiovascular medications.
[4] ClinicalTrials.gov. (2023). Ongoing aspirin trials.
[5] International Data Corporation. (2023). Pharmaceutical market projections.

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