Lovenox Dosage

Abdominal Surgery

The recommended dose of Lovenox is 40 mg by subcutaneous injection once a day (with the initial dose given 2 hours prior to surgery) in patients undergoing abdominal surgery who are at risk for thromboembolic complications. The usual duration of administration is 7 to 10 days [see Clinical Studies (14.1)].

Hip or Knee Replacement Surgery

The recommended dose of Lovenox is 30 mg every 12 hours administered by subcutaneous injection in patients undergoing hip or knee replacement surgery. Administer the initial dose 12 to 24 hours after surgery, provided that hemostasis has been established. The usual duration of administration is 7 to 10 days [see Clinical Studies (14.2)].

A dose of Lovenox of 40 mg once a day subcutaneously may be considered for hip replacement surgery for up to 3 weeks. Administer the initial dose 12 (±3) hours prior to surgery.

Medical Patients during Acute Illness

The recommended dose of Lovenox is 40 mg once a day administered by subcutaneous injection for medical patients at risk for thromboembolic complications due to severely restricted mobility during acute illness. The usual duration of administration is 6 to 11 days [see Clinical Studies (14.3)].

Treatment of Deep Vein Thrombosis with or without Pulmonary Embolism

The recommended dose of Lovenox is 1 mg/kg every 12 hours administered subcutaneously in patients with acute deep vein thrombosis without pulmonary embolism, who can be treated at home in an outpatient setting.

The recommended dose of Lovenox is 1 mg/kg every 12 hours administered subcutaneously or 1.5 mg/kg once a day administered subcutaneously at the same time every day for inpatient (hospital) treatment of patients with acute deep vein thrombosis with pulmonary embolism or patients with acute deep vein thrombosis without pulmonary embolism (who are not candidates for outpatient treatment).

In both outpatient and inpatient (hospital) treatments, initiate warfarin sodium therapy when appropriate (usually within 72 hours of Lovenox). Continue Lovenox for a minimum of 5 days and until a therapeutic oral anticoagulant effect has been achieved (International Normalization Ratio 2 to 3). The average duration of administration is 7 days [see Clinical Studies (14.4)].

Unstable Angina and Non–Q-Wave Myocardial Infarction

The recommended dose of Lovenox is 1 mg/kg administered subcutaneously every 12 hours in conjunction with oral aspirin therapy (100 to 325 mg once daily) in patients with unstable angina or non–Q-wave myocardial infarction. Treat with Lovenox for a minimum of 2 days and continue until clinical stabilization. The usual duration of treatment is 2 to 8 days [see Warnings and Precautions (5.2) and Clinical Studies (14.5)].

Treatment of Acute ST-Segment Elevation Myocardial Infarction

The recommended dose of Lovenox is a single intravenous bolus of 30 mg plus a 1 mg/kg subcutaneous dose followed by 1 mg/kg administered subcutaneously every 12 hours (maximum 100 mg for the first two doses only, followed by 1 mg/kg dosing for the remaining doses) in patients with acute ST-segment elevation myocardial infarction. Reduce the dosage in patients ≥75 years of age [see Dosage and Administration (2.4)]. Unless contraindicated, administer aspirin to all patients as soon as they are identified as having STEMI and continue dosing with 75 to 325 mg once daily.

When administered in conjunction with a thrombolytic (fibrin specific or non–fibrin specific), administer Lovenox between 15 minutes before and 30 minutes after the start of fibrinolytic therapy. The usual duration of Lovenox therapy is 8 days or until hospital discharge.

For patients managed with percutaneous coronary intervention (PCI), if the last Lovenox subcutaneous administration was given less than 8 hours before balloon inflation, no additional dosing is needed. If the last Lovenox subcutaneous administration was given more than 8 hours before balloon inflation, administer an intravenous bolus of 0.3 mg/kg of Lovenox [see Warnings and Precautions (5.2)].

Subcutaneous Injection Technique

• Position patients in a supine position for Lovenox administration by deep subcutaneous injection.
• Do not expel the air bubble from the prefilled syringes before the injection, to avoid the loss of drug.
• Do not inject into skin that has bruises or scars. Do not inject through clothes.
• Alternate injection sites between the left and right anterolateral and left and right posterolateral abdominal wall.
• Introduce the whole length of the needle into a skin fold held between the thumb and forefinger; hold the skin fold throughout the injection. To minimize bruising, do not rub the injection site after completion of the injection.

Lovenox prefilled syringes and graduated prefilled syringes are for single, one-time use only and are available with a system that shields the needle after injection.

Remove the prefilled syringe from the packaging by peeling at the arrow as directed on the lid. Do not remove by pulling on the plunger as this may damage the syringe.

1. Remove the needle shield by pulling it straight off the syringe (see Figure A). If less than the full syringe volume is needed to administer the prescribed dose, eject syringe contents until the prescribed dose is left in the syringe.
   

   Figure A

   
   

   

2. Inject using standard technique, pushing the plunger to the bottom of the syringe (see Figure B).
   

   Figure B

   
   

   

3. Remove the syringe from the injection site keeping your finger on the plunger rod (see Figure C).
   

   Figure C

   
   

   

4. Orient the needle away from you and others, and activate the safety system by firmly pushing the plunger rod. The protective sleeve will automatically cover the needle and an audible "click" will be heard to confirm shield activation (see Figure D).
   

   Figure D

   
   

   

5. Immediately dispose of the syringe in the nearest sharps container (see Figure E).
   

   Figure E

   
   

   

NOTE:

• The safety system can only be activated once the syringe has been emptied.
• Activation of the safety system must be done only after removing the needle from the patient's skin.
• Do not replace the needle shield after injection.
• The safety system should not be sterilized.

Activation of the safety system may cause minimal splatter of fluid. For optimal safety, activate the system while orienting it downwards away from yourself and others.

Intravenous (Bolus) Injection Technique

Use the multiple-dose vial for intravenous injections. Administer Lovenox through an intravenous line. Do not mix or coadminister Lovenox with other medications. Flush the intravenous access device with a sufficient volume of saline or dextrose solution prior to and following the intravenous bolus administration of Lovenox, to prevent mixing of drugs. Lovenox is compatible with normal saline solution (0.9%) or 5% dextrose in water.