Drug Interaction Report

Dipyridamole and Adenosine: Interaction Details

A pharmacist-reviewed analysis of the Dipyridamole and Adenosine interaction: the documented clinical effects, severity rating, onset, mechanism, and management considerations, with cited references throughout.

AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature

Dipyridamole

Permole® Persantine®
+

Adenosine

No brand names on record
Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by
Dr. Brian Staiger, PharmD, BCPS
Updated Aug 8, 2026
Editorial policy · Data sources
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Interaction severity
Moderate
Can be significant — usually manageable with monitoring.
How we grade severity & evidence

Severity levels

  • Contraindicated: These should generally not be used together.
  • Major: Potentially serious — often needs a change or close monitoring.
  • Moderate: Can be significant — usually manageable with monitoring.
  • Minor: Usually limited clinical impact.

Evidence grades

  • Established: Well documented — supported by controlled studies or strong clinical data.
  • Probable: Good supporting evidence, though not definitively proven.
  • Suspected: Some evidence suggests this interaction, but it is not well established.
  • Possible: Limited or conflicting evidence; the interaction may occur.
  • Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.

Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.

Of 191 documented Dipyridamole interactions, 41 are rated moderate — including this one.
Onset
rapid
Evidence
probable
Severity
Moderate

What happens

Adenosine toxicity (hypotension, dyspnea, vomiting)

Interaction Deep Dive

In a number of case reports the administration of dipyridamole decreased the dose of adenosine required to terminate a tachycardia73. This interaction has been used therapeutically to produce controlled hypotension during surgery 5. Significantly lower doses of adenosine should be given to patients who also receive dipyridamole 8.

Why it happens (mechanism)

Decreased metabolism

Literature reports

4 reports — tap to read

a) Dipyridamole protects against adenosine degradation by blocking the uptake into cells and can potentiate the clinical effects of adenosine. Pretreatment with dipyridamole 5 mg/kg administered intravenously over 5 minutes followed by an infusion of 8 mg/kg/min lowered the adenosine dose by 75% 1234. It is recommended that the initial dose of adenosine not exceed 1 mg in patients who also receive dipyridamole to avoid severe bradyarrhythmias 3.

b) Dipyridamole competitively inhibits the transport of adenosine into cells, thus preventing subsequent deamination of adenosine to inosine 12. In a study involving patients with spontaneous supraventricular tachycardia, the mean dose of adenosine required to produce restoration of sinus rhythm or ventricular slowing to less than 100 beats/minute was 1 mg in dipyridamole patients and 8.8 mg in patients who were not receiving dipyridamole. Profound bradycardia with atrial flutter was described in a patient receiving dipyridamole following adenosine administration 3.

c) This interaction has been used therapeutically to produce controlled hypotension during surgery produced with intravenous infusions of adenosine 200 to 300 mcg/kg/minute in patients not treated with dipyridamole; in patients receiving dipyridamole, effective adenosine doses were 140 mcg/kg/minute 5.

d) The extended-release formulation of dipyridamole may antagonize the breakdown of adenosine, which may result in exaggeration of the effects of adenosine, including the induction of hypotension and atrial-ventricular block 6. The author recommends that patients taking adenosine should be referred for an adenosine pharmacologic stress perfusion test.

Common questions

Can I take Dipyridamole and Adenosine together?

Adenosine toxicity (hypotension, dyspnea, vomiting) Always confirm with your pharmacist or prescriber before making any change.

How serious is the Dipyridamole and Adenosine interaction?

It is rated moderate. Can be significant — usually manageable with monitoring.

How quickly could this interaction happen?

The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.

How strong is the evidence for this interaction?

The evidence is graded "probable". Good supporting evidence, though not definitively proven.

Questions for your pharmacist

  • Does my dose of Dipyridamole or Adenosine need adjusting while I take them together?
  • What symptoms should prompt me to call you or my prescriber right away?
  • Does the timing of my doses matter for this combination?
  • Is there anything you'd monitor while I'm on both?

References (8)

  1. Berne RM, DiMarco JP, & Belardinelli L: Dromotropic effects of adenosine and adenosine triphosphate in the treatment of cardiac arrhythmias involving the atrioventricular node. Circulation 1984; 69:1195-1197.
  2. Klabunde RE: Dipyridamole inhibition of adenosine metabolism in human blood. Eur J Pharmacol 1983; 93:21-26. PubMed
  3. Watt AH, Bernard MS, Webster J, et al: Intravenous adenosine in the treatment of supraventricular tachycardia: a dose-ranging study and interaction with dipyridamole. Br J Clin Pharmacol 1986; 21:227-230. DOI
  4. Lerman BB, Wesley RC, & Belardinelli L: Electrophysiologic effects of dipyridamole on atrioventricular nodal conduction and supraventricular tachycardia: role of endogenous adenosine. Circulation 1989; 80:1536-1543. PubMed
  5. Sollevi A, Lagerkranser M, Irestedt L, et al: Controlled hypotension with adenosine in cerebral aneurysm surgery. Anesthesiology 1984; 61:400-405. DOI
  6. Bergmann S: Alert to physicians: possible interaction of aggrenox and adenosine (letter). J Am Coll Cardiol 2000; 36(4):1432. PubMed
  7. German DC, Kredich NM, & Bjornsson TD: Oral dipyridamole increases plasma adenosine levels in human beings. Clin Pharmacol Ther 1989; 45:80-84. DOI
  8. Product Information: Adenocard(R), adenosine injection. Fujisawa Healthcare, Inc. Deerfield, IL, 2002. DailyMed
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Dipyridamole

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Beyond drug–drug

These medications also interact with supplements

Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:

Dipyridamole + Activated Charcoal Adenosine Danshen Piracetam Aconite Allspice Aloe Alpha-lipoic Acid + 211 more
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This information is for education, not a substitute for professional medical advice. Do not start, stop, or change any medication without talking to your pharmacist or prescriber.