Acetylsalicylic acid clinical trials
Acetylsalicylic acid is named as an intervention in 13 current clinical trials in our Italy, Denmark, Spain, Belgium, USA, France, Switzerland, Czechia, Netherlands, Sweden, Norway, Canada, Australia and Brazil registers. 6 are recruiting patients now. The most common phase is Phase 3. The sponsor with the most trials is Regeneron Pharmaceuticals (1). The most-studied condition is Colorectal Cancer. The EU clinical trials register (CTIS) separately lists 8 authorised or ongoing trials.
Where Acetylsalicylic acid is approved
All regulators →Of the three regulators tracked here, the first to approve Acetylsalicylic acid was Canada, on 14 Jan 1994.
- 1 EU orphan designation, most recently for treatment of polycythaemia vera (29 Jul 2004, withdrawn)
From the regulators' own registers: FDA Drugs@FDA, the EMA medicines list and Health Canada's Notice of Compliance database. Dates are the first listed approval of a product containing only this substance; combination products and nationally authorised EU medicines are not counted.
Patient leaflets for Acetylsalicylic acid
The package leaflet is the official guide for patients that comes with every medicine. These links go to the regulators that publish it.
- IEIreland: 8 products on the HPRA listEach product record links to the HPRA, which publishes the leaflet and SmPC.
- UKUnited Kingdom: Search MHRA ProductsPatient information leaflets and SmPCs for UK-licensed products.
- USUnited States: Search DailyMedFDA-approved labels, including patient and medication guides.
Leaflets differ between brands and countries; always read the one that comes with your own medicine. This is regulatory information, not medical advice.
Trials by status
Trials by phase
Clinical trials of Acetylsalicylic acid
13 trialsRegisters list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
Acetylsalicylic acid in the EU trials register (CTIS)
8 trialsAuthorised or ongoing trials in the EU Clinical Trials Information System that list a product containing Acetylsalicylic acid. Many trials are registered in both CTIS and ClinicalTrials.gov, so these are shown separately rather than added to the count above. Trials with a site in Ireland are listed first.
Acetylsalicylic acid across our data
Ireland · EU · USThe same active substance in our other registers, matched by its exact name. Each entry links to the register record it comes from.
Licensed in Ireland (HPRA)
8 single-substance products containing Acetylsalicylic acid on the HPRA medicines list.
- Aspirin Krka 75 mg gastro-resistant tabletsKRKA, d.d., Novo mesto · PA1347/070/001 · Marketed
- Caprin 75 mg gastro-resistant tabletsPinewood Laboratories Limited · PA0281/268/001 · Marketed
- Disprin Direct 300 mg Orodispersible TabletsReckitt Benckiser Ireland Limited · PA0979/007/001 · Marketed
- Disprin Extra Strength 500 mg Effervescent tabletsReckitt Benckiser Ireland Limited · PA0979/006/002 · Marketed
- Disprin Original 300 mg Dispersible TabletsReckitt Benckiser Ireland Limited · PA0979/006/001 · Marketed
Supply shortages
No entry for Acetylsalicylic acid in the EMA, FDA or German BfArM shortage lists we track.
Conditions studied with Acetylsalicylic acid
19 conditionsAll 19 conditions
| Condition (as registered) | Trials |
|---|---|
| Colorectal Cancer | 2 |
| Colon Cancer | 2 |
| Symptomatic Venous Thromboembolism (VTE) | 1 |
| Prostate Cancer | 1 |
| Coronary Artery Disease | 1 |
| Inflammation | 1 |
| Smoking Cessation | 1 |
| Diet Modification | 1 |
| Physical Activity | 1 |
| Adjuvant Therapy | 1 |
| Embryo Transfer | 1 |
| Hypertension, Pregnancy Induced | 1 |
| Aortic Valve Stenosis | 1 |
| Cardiovascular Diseases | 1 |
| Heart Diseases | 1 |
| Heart Valve Diseases | 1 |
| Erythropoietin Adverse Reaction | 1 |
| Ovarian Cancer Prevention | 1 |
| Acute Coronary Syndrome | 1 |
Sponsors
lead sponsor per trialBy country register
A trial with sites in more than one country appears in each of those registers. CTIS does not publish a recruiting flag; its trials may also appear in the registers above.
Related compounds
Questions about Acetylsalicylic acid trials
How many clinical trials are testing Acetylsalicylic acid?
13 current trials in our Italy, Denmark, Spain, Belgium, USA, France, Switzerland, Czechia, Netherlands, Sweden, Norway, Canada, Australia and Brazil registers name Acetylsalicylic acid (also registered as SUB12730MIG) as a drug or biological intervention, as of the registry sync on 13 November 2026. Completed and withdrawn studies are not counted.
Are Acetylsalicylic acid trials recruiting patients?
Yes. 6 of the 13 trials are recruiting: 2 with sites in Italy, 1 with sites in Denmark, 2 with sites in Spain, 1 with sites in Belgium, 1 with sites in USA, 1 with sites in France, 1 with sites in Switzerland and 1 with sites in Czechia. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Who sponsors Acetylsalicylic acid clinical trials?
Regeneron Pharmaceuticals (1), Gustave Roussy, Cancer Campus, Grand Paris (1), Instituto de Investigación Sanitaria Aragón (1) and Campus Bio-Medico University (1), among 13 lead sponsors in total. The number in brackets is how many trials each organisation leads.
Is Acetylsalicylic acid licensed in Ireland?
Yes. The HPRA medicines list includes 8 single-substance products containing Acetylsalicylic acid, for example Aspirin Krka 75 mg gastro-resistant tablets (KRKA, d.d., Novo mesto). A licence does not mean a product is currently marketed or reimbursed; see each product's record.
Is there a Acetylsalicylic acid shortage?
Not in the lists we track: Acetylsalicylic acid has no entry in the EMA, FDA or German BfArM shortage registers as of their latest sync.
Where does this information come from?
Every trial, status, phase and sponsor on this page is copied from public ClinicalTrials.gov records by a daily sync. Nothing here describes how Acetylsalicylic acid works or whether it is effective, and it is not medical advice.
How this page is built
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Acetylsalicylic acid works or whether it is effective. Each trial links to its own record so you can check it yourself.
- ClinicalTrials.gov (U.S. National Library of Medicine) ↗ Trial IDs, titles, intervention names and synonyms, phase, overall status, lead sponsor and conditions for every trial on this page
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists Acetylsalicylic acid (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 13 Nov 2026. How every register is built: methodology · fixes we have made: corrections log.