2,000 IU/0.2 mL & 6,000 IU/0.6 mL soln for inj Abdominal surgery 40 mg once daily w/ initial dose given 2 hr prior to surgery for 7-10 days, up to 12 days. 
Hip or knee replacement surgery 30 mg every 12 hr given 12-24 hr after surgery for 7-10 days, up to 14 days. For hip replacement surgery, 40 mg once daily given initially 12 hr prior to surgery may be considered & continue prophylaxis for 3 wk. 
Medical patient during acute illness 40 mg once daily for 6-11 days up to 14 days. 
4,000 IU/0.4 mL soln for inj Prophylaxis of VTE disease in moderate & high-risk surgical patients 2,000 IU (20 mg) once daily initiated 2 hr before surgery. Maintain for a min of 7-10 days. 
Patient at high risk of thromboembolism 4,000 IU (40 mg) preferably started 12 hr before surgery. If there is a need for earlier than 12 hr of pre-op prophylactic initiation, the last inj should be administered no later than 12 hr prior to surgery & resumed 12 hr after surgery. 
Patient who undergoes major orthopedic surgery Extended thromboprophylaxis for up to 5 wk. 
Patient w/ high VTE risk who undergoes abdominal or pelvic surgery for cancer Extended prophylaxis for up to 4 wk. 
Prophylaxis of VTE in medical patient 4,000 IU (40 mg) once daily for 6-14 days. 
DVT & PE 150 IU/kg (1.5 mg/kg) once daily for uncomplicated patients w/ a low risk of VTE recurrence & 100 IU/kg (1 mg/kg) bid for all other patients eg, those w/ obesity, symptomatic PE, cancer, recurrent VTE or proximal thrombosis). 
Prevention of thrombus formation during hemodialysis 100 IU/kg (1 mg/kg). 
Patient w/ high risk of hemorrhage Reduce dose to 50 IU/kg for double vascular access or 75 IU/kg for single vascular access. 
Unstable angina & NSTEMI 100 IU/kg every 12 hr + antiplatelet therapy for 2-8 days. 
Acute STEMI 3,000 IU as single IV bolus + 100 IU/kg SC dose followed by 100 IU/kg as SC every 12 hr (max: 10,000 IU for each of the 1st 2 SC doses). Administer concomitantly w/ antiplatelet therapy eg, ASA 75 mg-325 mg once daily. Duration of treatment: 8 days or until hospital discharge. 
Elderly ≥75 yr Acute STEMI Initially 75 IU/kg SC every 12 hr. Max: 7,500 IU for each of the 1st 2 SC doses only, followed by 75 IU/kg SC dosing for the remaining doses.