How do you  increase prothrombin time?
<answer> Take blood thinners. <context> Prothrombin is another protein produced in your liver. The prothrombin time (PT) test measures how well and how long it takes your blood to clot. It normally takes about 25 to 30 seconds. It may take longer if you take blood thinners. Other reasons for abnormal results include hemophilia, liver disease, and malabsorption.