American Society of Hirudotherapy

Dabigatran

Oral direct thrombin inhibitor — FDA approved 2010 for stroke prevention in atrial fibrillation. Conceptual descendant of hirudin pharmacology.

Studied off-labelLast updated: 2026-05-26 · Reviewed by ASH Editorial Board
Molecular weight of Dabigatran compared with other characterized leech-derived compoundsHementerin80 kDaHementin80 kDaHementin-Like Protein (HLP-1)80 kDaLeech Collagenase70 kDaHaemadipsa yanyuanensis Progr…70 kDaLeech Apyrase67 kDaCalin65 kDaHyaluronidase60 kDaAntithrombin III binding prot…58 kDaCollagenolytic Fibrinolysin55 kDaLeech Thrombospondin-Like Pro…50 kDaDabigatran0.5 kDa
Molecular weight (kilodaltons) of Dabigatran (highlighted) alongside other characterized leech salivary compounds. Smaller proteins/peptides generally diffuse and act faster.

Mechanistic Evidence Box

Studied off-label
Page type
Compound profile
Evidence type
Oral direct thrombin inhibitor — FDA approved 2010 for stroke prevention in atrial fibrillation. Conceptual descendant of hirudin pharmacology.
Evidence level
FDA-cleared regulatory context
Drug vs leech
Synthetic analog
Safety domains
Bleeding

Clinical translation limit

Dabigatran is an FDA-approved synthetic small-molecule direct thrombin inhibitor; it is chemically distinct from hirudin, sharing only the target. Its RCT evidence base (RE-LY) applies only to the drug, not to whole medicinal-leech therapy. Calling dabigatran a 'descendant' of hirudin is conceptual/pharmacological, not chemical.

Molecular Profile

Category
Anticoagulant
Evidence tier
Tier A — FDA-approved derivative
Molecular weight
471.51 Da
Source species
Synthetic small molecule
Discovered
2002 · Boehringer Ingelheim
PubChem CID
216210
Derived FDA-approved drug
Pradaxa (FDA approved Oct 2010)
Dabigatran molecular structure

Biological Targets

  • thrombin (Factor IIa)

Key Citations

  1. Connolly SJ et al. (RE-LY) (2009), N Engl J Med · PMID 19717844

Related Anticoagulant Compounds

This website provides educational information and does not constitute medical advice, diagnosis, or treatment recommendations. Medicinal leech therapy carries clinically meaningful risks and should be performed only by qualified clinicians under institutionally approved protocols. FDA 510(k) clearance for medicinal leeches is limited to specific indications; investigational and off-label discussions are labeled accordingly. For patient-specific guidance, consult a qualified healthcare provider.