Heparin Sodium 5000 [USP'U]/.5mL Injection, Solution — NDC 63323-118-05 (Billing 63323-0118-05)

5 WARNINGS AND PRECAUTIONS • Fatal Medication Errors: Confirm choice of correct strength prior to administration ( 5.1 ) • Hemorrhage: Fatal cases have occurred. Use caution in conditions with increased risk of hemorrhage ( 5.2 ) • HIT and HITT: Monitor for signs and symptoms and discontinue if indicative of HIT and HITT ( 5.3 ) • Monitoring: Blood coagulation tests guide therapy for full-dose heparin. • Monitor platelet count and hematocrit in all patients receiving heparin ( 5.5 , 5.6 )

5.1Fatal Medication Errors Do not use Heparin Sodium Injection as a “catheter lock flush” product. Heparin Sodium Injection is supplied in syringes containing a highly concentrated solution of 10,000 units in 1 mL (5,000 units per 0.5 mL). Fatal hemorrhages have occurred in pediatric patients due to medication errors in which 1 mL Heparin Sodium Injection vials were confused with 1 mL “catheter lock flush” vials.

Carefully examine all Heparin Sodium Injection syringes to confirm the correct syringe choice prior to administration of the drug.

5.2Hemorrhage Avoid using heparin in the presence of major bleeding, except when the benefits of heparin therapy outweigh the potential risks. Hemorrhage can occur at virtually any site in patients receiving heparin. Fatal hemorrhages have occurred.

Adrenal hemorrhage (with resultant acute adrenal insufficiency), ovarian hemorrhage, and retroperitoneal hemorrhage have occurred during anticoagulant therapy with heparin [see Adverse Reactions ( 6.1 )] . A higher incidence of bleeding has been reported in patients, particularly women, over 60 years of age [see Clinical Pharmacology ( 12.3 )] . An unexplained fall in hematocrit, fall in blood pressure or any other unexplained symptom should lead to serious consideration of a hemorrhagic event.

Use heparin sodium with caution in disease states in which there is increased risk of hemorrhage, including: • Cardiovascular - Subacute bacterial endocarditis, severe hypertension. • Surgical - During and immediately following (a) spinal tap or spinal anesthesia or (b) major surgery, especially involving the brain, spinal cord, or eye. • Hematologic - Conditions associated with increased bleeding tendencies, such as hemophilia, thrombocytopenia and some vascular purpuras. • Patients with hereditary antithrombin III deficiency receiving concurrent antithrombin III therapy o The anticoagulant effect of heparin is enhanced by concurrent treatment with antithrombin III (human) in patients with hereditary antithrombin III deficiency.

To reduce the risk of bleeding, reduce the heparin dose during concomitant treatment with antithrombin III (human). • Gastrointestinal - Ulcerative lesions and continuous tube drainage of the stomach or small intestine. • Other - Menstruation, liver disease with impaired hemostasis.

5.3Heparin-Induced Thrombocytopenia and Heparin-Induced Thrombocytopenia and Thrombosis Heparin-induced thrombocytopenia (HIT) is a serious antibody-mediated reaction. HIT occurs in patients treated with heparin and is due to the development of antibodies to a platelet Factor 4-heparin complex that induce in vivo platelet aggregation. HIT may progress to the development of venous and arterial thromboses, a condition referred to as heparin-induced thrombocytopenia with thrombosis (HITT).

Thrombotic events may also be the initial presentation for HITT. These serious thromboembolic events include deep vein thrombosis, pulmonary embolism, cerebral vein thrombosis, limb ischemia, stroke, myocardial infarction, mesenteric thrombosis, renal arterial thrombosis, skin necrosis, gangrene of the extremities that may lead to amputation, and possibly death. If the platelet count falls below 100,000/mm 3 or if recurrent thrombosis develops, promptly discontinue heparin, evaluate for HIT and HITT, and, if necessary, administer an alternative anticoagulant.

HIT or HITT can occur up to several weeks after the discontinuation of heparin therapy. Patients presenting with thrombocyt… [Excerpted — this section continues on DailyMed.]

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: • Hemorrhage [see Warnings and Precautions ( 5.2 )] • Heparin-Induced Thrombocytopenia and Heparin-Induced Thrombocytopenia and Thrombosis [see Warnings and Precautions ( 5.3 )] • Thrombocytopenia [see Warnings and Precautions ( 5.4 )] • Heparin Resistance [see Warnings and Precautions ( 5.6 )] • Hypersensitivity [see Warnings and Precautions ( 5.7 )] Most common adverse reactions are hemorrhage, thrombocytopenia, HIT and HITT, injection site irritation, general hypersensitivity reactions, and elevations of aminotransferase levels.

( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Fresenius Kabi USA, LLC at 1-800-551-7176 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Postmarketing Experience The following adverse reactions have been identified during post approval use of Heparin Sodium Injection. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. • Hemorrhage is the chief complication that may result from heparin therapy [ see Warnings and Precautions ( 5.2 )]. Gastrointestinal or urinary tract bleeding during anticoagulant therapy may indicate the presence of an underlying occult lesion.

Bleeding can occur at any site but certain specific hemorrhagic complications may be difficult to detect: o Adrenal hemorrhage, with resultant acute adrenal insufficiency, has occurred with heparin therapy, including fatal cases. o Ovarian (corpus luteum) hemorrhage developed in a number of women of reproductive age receiving short- or long-term heparin therapy. o Retroperitoneal hemorrhage • HIT and HITT, including delayed onset cases [see Warnings and Precautions ( 5.3 )]. • Local Irritation – Local irritation, erythema, mild pain, hematoma or ulceration may follow deep subcutaneous (intrafat) injection of heparin sodium.

Because these complications are much more common after intramuscular use, the intramuscular route is not recommended. • Histamine-like reactions – Such reactions have been observed at the site of injections. Necrosis of the skin has been reported at the site of subcutaneous injection of heparin, occasionally requiring skin grafting [see Warnings and Precautions ( 5.3 )] . • Hypersensitivity – Generalized hypersensitivity reactions have been reported, with chills, fever and urticaria as the most usual manifestations, and asthma, rhinitis, lacrimation, headache, nausea and vomiting, and anaphylactoid reactions, including shock, occurring less frequently.

Itching and burning, especially on the plantar side of the feet, may occur. [see Warnings and Precautions (5.8)] • Elevations of aminotransferases – Significant elevations of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels have occurred in patients who have received heparin [see Drug Interactions (7.4)] . • Miscellaneous - Osteoporosis following long-term administration of high doses of heparin, cutaneous necrosis after systemic administration, suppression of aldosterone synthesis, delayed transient alopecia, priapism, and rebound hyperlipemia on discontinuation of heparin sodium have also been reported.

7 DRUG INTERACTIONS Drugs that interfere with platelet aggregation: May induce bleeding ( 7.2 )

7.1Oral Anticoagulants Heparin sodium may prolong the one-stage prothrombin time. Therefore, when heparin sodium is given with dicumarol or warfarin sodium, a period of at least 5 hours after the last intravenous dose or 24 hours after the last subcutaneous dose should elapse before blood is drawn, if a valid prothrombin time is to be obtained.

7.2Platelet Inhibitors Drugs such as NSAIDS (including salicylic acid, ibuprofen, indomethacin, and celecoxib), dextran, phenylbutazone, thienopyridines, dipyridamole, hydroxychloroquine, glycoprotein IIb/IIIa antagonists (including abciximab, eptifibatide, and tirofiban), and others that interfere with platelet-aggregation reactions (the main hemostatic defense of heparinized patients) may induce bleeding and should be used with caution in patients receiving heparin sodium. To reduce the risk of bleeding, a reduction in the dose of antiplatelet agent or heparin is recommended.

7.3Other Interactions Digitalis, tetracyclines, nicotine or antihistamines may partially counteract the anticoagulant action of heparin sodium. Intravenous nitroglycerin administered to heparinized patients may result in a decrease of the partial thromboplastin time with subsequent rebound effect upon discontinuation of nitroglycerin. Careful monitoring of partial thromboplastin time and adjustment of heparin dosage are recommended during coadministration of heparin and intravenous nitroglycerin.

Antithrombin III (human) – The anticoagulant effect of heparin is enhanced by concurrent treatment with antithrombin III (human) in patients with hereditary antithrombin III deficiency. To reduce the risk of bleeding, a reduced dosage of heparin is recommended during treatment with antithrombin III (human).