Missed doses of medication are common during hospitalization. Investigators who studied 202 trauma and general surgery patients admitted to a level I trauma center found that 58.9% missed at least one dose of enoxaparin and that the incidence of DVT was 23.5% in patients who missed at least one dose, compared with 4.8% in patients who did not miss any dosesWarfarin, an oral vitamin K antagonist, is also often used for long-term thromboprophylaxis