Drug Interaction Report

Desirudin and Doxycycline Injection: Interaction Details

A pharmacist-reviewed analysis of the Desirudin and Doxycycline Injection 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

Doxycycline Injection

Acticlate Adoxa Alodox Avidoxy Doryx Doxy Doxy 100® Doxy 200®
+

Desirudin

Iprivask
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
Major
Potentially serious — often needs a change or close 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 50 documented Desirudin interactions, 44 are rated major — including this one.
Worried about symptoms right now? Contact your pharmacist or prescriber, or call Poison Control at 1-800-222-1222 (US). Call 911 for an emergency.
Onset
unspecified
Evidence
theoretical
Severity
Major

What happens

An increased risk of bleeding

Interaction Deep Dive

Concomitant use of doxycycline and anticoagulants may increase the risk of bleeding. Hence, patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage1. Tetracycline therapy has been shown to reduced plasma prothrombin activity 23546. A case report has implicated doxycycline as a cause of increased hypoprothrombinemic effect of warfarin 2.

Why it happens (mechanism)

Depression of plasma prothrombin activity

Literature reports

1 report — tap to read

a) Tetracycline therapy has been shown to reduced plasma prothrombin activity 23546. A case report has implicated doxycycline as a cause of increased hypoprothrombinemic effect of warfarin 2.

Common questions

Can I take Desirudin and Doxycycline Injection together?

An increased risk of bleeding Always confirm with your pharmacist or prescriber before making any change.

How serious is the Desirudin and Doxycycline Injection interaction?

It is rated major. Potentially serious — often needs a change or close monitoring.

How quickly could this interaction happen?

The documented onset is "unspecified". The timing of this interaction is not well characterized.

How strong is the evidence for this interaction?

The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.

Questions for your pharmacist

  • Does my dose of Desirudin or Doxycycline Injection 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 a safer alternative to one of these medications for me?

References (6)

  1. Product Information: ORACEA(R) oral capsules, doxycycline oral capsules. Galderma Laboratories, L.P. (per DailyMed), Dallas, TX, 2025. DailyMed
  2. Westfall LK, Mintzer DL, & Wiser TH: Potentiation of warfarin by tetracycline (letter). Am J Hosp Pharm 1980; 37:1620. DOI
  3. Finegold SM: Interaction of antimicrobial therapy and intestinal flora. Am J Clin Nutr 1970; 23:1466. PubMed
  4. Messinger WJ: The effect of a bowel sterilizing antibiotic on blood coagulation mechanisms. Angiology 1965; 16:29. DOI
  5. Martin WJ: Hemorrhage diathesis induced by antimicrobials. JAMA 1968; 285:192.
  6. Searcy RL, Simms NM, Foreman JA, et al: Evaluation of the blood-clotting mechanisms in tetracycline-treated patients. Antimicrob Agents Chemother 1964; 10:179-183.
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Doxycycline Injection

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Desirudin

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