This process is called anticoagulation. You will likely be treated with anticoagulants for 3-6 months following your first episode of DVT and longer than 6 months if you have recurrent episodes. These medications increase your risk of bleeding from anywhere in your body. If you have a clot above the knee, you most likely will be admitted to a hospital for initial therapy. It rapidly stops your blood from clotting further.
Warfarin is an anticoagulant taken by mouth.
This medication can be effective only within a narrow range. The medication level must be high enough that it slows clotting but not so high that it allows excessive bleeding. While taking warfarin, you may undergo blood tests often to check your prothrombin time. Your doctor will aim to keep the INR within a certain range by adjusting the dose of warfarin. Low molecular weight heparin is a newer option for treating DVT at home.