What is the difference between warfarin and lovenox (enoxaparin)?

Many. Warfarin is a vitamin k antagonist and is given in pill form and is much cheaper, requires constant checking levels in the blood ( pt-inr). Lovenox (enoxaparin) is a low molecular sintetic heparin, injectable once or twice a day subcutaneously, much more expensive buy does not requiere to check the levels in the blood tests. Warfarin has to be stopped 3 to 5 days before surgery, Lovenox (enoxaparin) only 36 hrs.
Different meds. They are different meds. Lovenox (enoxaparin) is low molecular weight Heparin it is a shot (injection) that is quite expansive, but doesn't require dietary changes or blood work for monitoring or has as many drug-drug interactions as warfarin (coumadin) that is cheaper oral medicine that requires extensive monitoring, can cause a lot of issues, but in some cases Coumadin will be indicated and Lovenox (enoxaparin) will not.