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Nafamostat

Small molecule · Inhibitor of thrombin (F2), plasmin (PLG) and kallikrein (KLK1) · developed by Ensysce Biosciences

Phase 1 Most advanced trial
ENSC Developer
2 Registered trials

What is Nafamostat?

Nafamostat is a broad-spectrum synthetic serine protease inhibitor with anticoagulant, anti-inflammatory, and potential antiviral activities. It inhibits multiple proteases including thrombin, plasmin, kallikrein, trypsin, and TMPRSS2, blocking trypsinogen activation in pancreatitis and potentially inhibiting viral cell entry. It is studied in healthy volunteers for pharmacokinetics and has potential applications in cystic fibrosis and viral infections.

Summary written with AI from the sources listed at the end of this page.

At a glance

Also known as
Futhan
Drug type
Small molecule
Targets
thrombin (F2), plasmin (PLG), kallikrein (KLK1), trypsin (PRSS1), TMPRSS2, epithelial sodium channel (ENaC) (SCNN1B) (secondary target)
Mechanism
Inhibitor of thrombin (F2), plasmin (PLG) and kallikrein (KLK1)
Pathways
coagulation, complement system, inflammatory cascade
Therapy area
Immunology, Infectious disease, Respiratory
Developer
Ensysce Biosciences (ENSC)
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 1
UNII
Y25LQ0H97D

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT06500793 Phase 1 Pharmacokinetics Recruiting ENSC
NCT04406415 Phase 1 Pharmacokinetics Completed ENSC

Trials of the companies BioRadar tracks, from ClinicalTrials.gov, most advanced phase first.

Conditions studied

Healthy VolunteerPharmacokinetics

More from Ensysce Biosciences

Sources

Updated Oct 3, 2026. Something wrong or missing? Report it on the ENSC page.

Follow ENSC, the company behind Nafamostat

See ENSC's upcoming FDA decisions, trial readouts, cash runway and dilution risk, updated every day from SEC, FDA and ClinicalTrials.gov filings.

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Data: FDA (Drugs@FDA, Purple Book, DailyMed), NIH (NCI Thesaurus, GSRS, RxNorm), ClinicalTrials.gov • Informational purposes only, not medical or investment advice. • All drugs A–Z

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