Fasting Required: No
Specimen: Blood
Results: 1-2 Business Days
Description: The Prothrombin time (PT) test is most often used to check how well anti-coagulant or “blood-thinning” drugs are working. Anti-coagulant drugs help prevent the formation of blood clots. This is particularly important in people who have had a heart attack or other problems with their veins. The drug’s effectiveness can be determined by how much it prolongs the prothrombin-to-thrombin conversion time.