Drugs › Adenosine receptor agonist
Generic name
Adenosine: adverse event reports filed with FDA
845 reports list it as a suspect or interacting product, 2004–2026. Class: Adenosine receptor agonist. Also reported as Adenosine Injection, Adenosine Injection Usp.
- 845
- reports as suspect product
- 0% of all reports · about 38 a year
- 48
- reports, 12 months to June 2026
- 113 in the 12 months before
- 89.8%
- marked serious by the reporter
- 60.9% across the class
- 3.7%
- record death among outcomes, as reported
- 31 reports · not verified by FDA
Between January 2004 and June 2026, 845 adverse event reports received by FDA list adenosine, a generic name as a suspect or interacting product. Reports that mention it only as a concomitant medication (824) are left out of every figure here.
In the 12 months to June 2026, 48 reports listed it, down 58% from 113 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Over its reporting history that is about 38 reports a year and 0% of the 20,646,523 reports in the database, and 16.8% of the reports for the adenosine receptor agonist class. How many people take it is not in the data, so a count is not a rate of occurrence.
Reporters most often recorded drug ineffective (32.7%), supraventricular tachycardia (5.6%) and cardiac arrest (5.2%). A report can list several reactions, so shares add to more than 100%; 218 different terms appear across these reports. Drug ineffective is recorded in 32.7% of these reports, a larger share than in the median adenosine receptor agonist drug (16.4%).
89.8% of the reports are marked serious by the reporter (60.9% across the class); 3.7% record death among the outcomes and 46.9% record hospitalisation, as reported. 56.2% of the reports came from other health professionals, and the largest patient age group is 45 to 64 (27.5%). FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."
Reports by month, five years
Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.
By year received
2026 covers reports received through June 2026 only.
Reactions recorded in the reports
share of Adenosine reports recording the termmedian drug in adenosine receptor agonist
- Drug ineffectivethe medicine did not work as expected32.7%276
- Cardiac arrestthe heart stopped5.2%44
- Hypotensionlow blood pressure5.2%44
- Off label useused for a purpose or in a way not on the label4.9%41
- Dyspnoeashortness of breath4.6%39
- Bronchospasmtightening of the airways4.5%38
- Tachycardiafast heart rate3.7%31
- Product use in unapproved indicationused for a purpose not on the label3.6%30
- Treatment failurethe treatment did not work3.6%30
- Ventricular tachycardiaa fast rhythm from the lower heart chambers3.3%28
- Drug interactionan interaction between medicines3.2%27
- Maternal exposure during pregnancythe mother took the medicine during pregnancy3.2%27
- Foetal exposure during pregnancythe unborn baby was exposed to the medicine3%25
- Arteriospasm coronary2.8%24
- Bradycardiaslow heart rate2.7%23
- Atrial fibrillationan irregular heart rhythm2.6%22
- Dizzinesslight-headedness or unsteadiness2.2%19
- Ventricular fibrillationa chaotic rhythm from the lower heart chambers2.2%19
- Premature babya baby born early1.9%16
- Cardio-respiratory arrestthe heart and breathing stopped1.8%15
- Chest painchest pain1.8%15
- Exposure during pregnancythe medicine was taken during pregnancy1.4%12
- Condition aggravatedthe condition being treated got worse1.3%11
- Anaphylactic reactiona severe, sudden allergic reaction1.2%10
- Atrioventricular block1.2%10
- Infusion related reactiona reaction during or soon after an infusion1.2%10
- Respiratory arrestbreathing stopped1.2%10
Top 30 of 218 MedDRA preferred terms recorded across these reports, with a plain-language gloss where one is available. One report can record several terms. The hollow bar is the median share across the 2 drugs in the adenosine receptor agonist class; it describes the reports, not the patients. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."
Outcomes recorded
Outcome flags as the reporter set them; a report can carry several, and "other serious" is FDA's own category for serious reports outside the named outcomes. Grey bar: all 5,020 reports in the class. FDA has not verified any outcome and states that the reports "cannot be used to estimate the incidence of these events."
Patients and reporters
Patient age
Patient sex
Who reported
Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 66.5% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Supraventricular tachycardia | 181 | 21.4% |
| Tachycardia | 59 | 7% |
| Cardiac stress test | 49 | 5.8% |
| Ventricular tachycardia | 49 | 5.8% |
| Atrial tachycardia | 24 | 2.8% |
| Arrhythmia | 20 | 2.4% |
The indication field is filled in by the reporter and is often blank; shares are of all 845 reports.
In context
| Measure | Adenosine | Adenosine receptor agonist | All reports |
|---|---|---|---|
| Reports as suspect product | 845 | 5,020 | 20,646,523 |
| Share of that pool | — | 16.8% | 0% |
| Reports, latest 12 months | 48 | — | 1,332,454 |
| Marked serious | 89.8% | 60.9% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 37 | 28 | 91 |
| Hospitalisation recorded, per 1,000 reports | 469 | 149 | 213 |
| Consumer-filed share | 5.4% | 45.4% | 45.8% |
| Top term, share of reports | Drug ineffective 32.7% | median 16.4% | 6.3% |
Shares are of reports, not of patients treated. The number of people taking a product is not in the data, so none of these figures is a rate, and differences between columns reflect who takes a product, who reports and how long it has been sold. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."
Other drugs in the adenosine receptor agonist class
| Drug | Name type | Reports | Latest 12 months | Marked serious |
|---|---|---|---|---|
| Lexiscan(r) (regadenoson) | generic | 4,175 | 13 | 55.1% |
Ordered by report count for navigation only. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic." A brand and its generic are separate rows because reporters name them separately.
Questions about Adenosine reports
How many adverse event reports has FDA received for Adenosine?
845 reports list Adenosine as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 48 of them arrived in the latest 12 months. Another 824 list it only as a concomitant medication.
What reactions are recorded in Adenosine reports?
drug ineffective (32.7%), supraventricular tachycardia (5.6%), cardiac arrest (5.2%), hypotension (5.2%) and off label use (4.9%). These are MedDRA preferred terms coded from what the reporter described; a report can list several, and a term's presence is not a finding that Adenosine was responsible.
How serious are the reports?
89.8% are marked serious by the reporter. Among the outcomes recorded, 3.7% of reports include death and 46.9% include hospitalisation. FDA has not verified these outcomes and states that the reports "cannot be used to estimate the incidence" of the events.
Who files these reports?
other health professional (56.2%), physician (20.2%) and pharmacist (13.3%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Adenosine rising?
48 reports in the 12 months to June 2026, down 58% from 113 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Counts also move with how many people take a product, its time on the market and publicity.
Do these reports show that Adenosine was responsible for these reactions?
No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event." The reaction may relate to the condition being treated, to other medicines, or to something else.
Is this a list of the side effects of Adenosine?
No. It is a count of what was reported to FDA. The adverse reactions observed in clinical studies are printed on the FDA-approved label, which a pharmacist or clinician can go through with you.
How do I report an adverse event?
Consumers and health professionals can report to FDA through MedWatch (Form FDA 3500 online, or 1-800-FDA-1088), or to the manufacturer, which must pass reports on. See the guide on how to report.
Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. A report counts here when it lists Adenosine as a suspect or interacting product; reports listing it only as a concomitant medication (824) are excluded. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.
Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.