Anticoagulant
An anticoagulant was a substance that delayed or prevented the coagulation of blood. 

In 2153, Doctor Phlox located a marsupial on a class L planet whose saliva was a natural anticoagulant. ()

Jem'Hadar disruptors and Plasma rifle Disruptor bursts incorporated an anticoagulant into the energy stream; this prevented wounds inflicted by the weapon from healing. ()

External link

de:Antigerinnungsmittel
nl:Antistollingsmiddel
Drugs