Heparin Sodium and Dextrose 10000 [USP'U]/100mL Injection, Solution — NDC 0409-4520-30 (Billing 00409-4520-30)

5 WARNINGS AND PRECAUTIONS • Fatal Medication Errors: Confirm choice of correct strength prior to administration. ( 5.1 ) • Hemorrhage: Fatal cases have occurred. Monitor for signs of bleeding and manage promptly.

( 5.2 ) • HIT or HITT: Monitor for signs and symptoms and discontinue if indicative of HIT or HITT. ( 5.3) • Thrombocytopenia: Monitor platelet count during therapy; discontinue heparin if HIT or HITT is suspected. ( 5.4 ) • Monitoring: Blood coagulation tests guide therapy for full-dose heparin.

Monitor platelet count and hematocrit in all patients receiving heparin. ( 5.5 ) • Heparin Resistance: Increased resistance to heparin is frequently encountered in fever, thrombosis, thrombophlebitis, infections with thrombosing tendencies, myocardial infarction, cancer and in postsurgical patients. ( 5.6 ) • Hypersensitivity Reactions: Use in patients with prior reactions only in life-threatening situations.

( 5.7 ) • Hyperkalemia: Measure plasma potassium in patients at risk of hyperkalemia before starting heparin therapy and periodically in all patients. ( 5.8 ) • Elevations of Serum Aminotransferases: Interpret elevation of these enzymes with caution. ( 5.9 )

5.1Fatal Medication Errors Do not use this product as a "catheter lock flush" product. Heparin is supplied in various strengths. Fatal hemorrhages have occurred due to medication errors. Carefully examine all heparin products to confirm the correct container choice prior to administration of the drug.

5.2Hemorrhage Hemorrhage, including fatal events, has occurred in patients receiving heparin sodium. 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.

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 or fall in blood pressure 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 – 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 (HIT) and Heparin-Induced Thrombocytopenia and Thrombosis (HITT) HIT is a serious immune-mediated reaction resulting from irreversible aggregation of platelets. 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 known as HITT.

Thrombotic events may also be the initial presentation for HIT. These serious thromboembolic events include deep vein thrombosis, pulmonary embolism, cerebral vein thrombosis, limb ischemia, stroke, myocardial infarction, thrombus formation on a prosth… [Excerpted — this section continues on DailyMed.]

6 ADVERSE REACTIONS The following serious adverse reactions are described elsewhere in the labeling: • Hemorrhage [see Warnings and Precautions (5.2) ] • Heparin-Induced Thrombocytopenia and Heparin-Induced Thrombocytopenia with 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) ] • Hyperkalemia [see Warnings and Precautions (5.8) ] • Elevations of Serum Aminotransferases [see Warnings and Precautions (5.9) ] Most common adverse reactions are: hemorrhage, thrombocytopenia, HIT or HITT, heparin resistance, hypersensitivity reactions, hyperkalemia, and elevations of aminotransferase levels.

(6 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer Inc at 1-800-438-1985 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. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency. • Hemorrhage - Hemorrhage is the chief complication that may result from heparin therapy [see Warnings and Precautions (5.2) ] . An overly prolonged clotting time or minor bleeding during therapy can usually be controlled by withdrawing the drug [see Overdosage (10) ] .

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: - Adrenal hemorrhage, with resultant acute adrenal insufficiency, has occurred with heparin therapy, including fatal cases. - Ovarian (corpus luteum) hemorrhage developed in a number of women of reproductive age receiving short- or long-term anticoagulant therapy. - Retroperitoneal hemorrhage. • Vascular Disorders – Contusion, vasospastic reactions (including episodes of painful, ischemic, and cyanosed limbs). • HIT and HITT, including delayed onset cases, and Thrombocytopenia - [see Warnings and Precautions (5.3 , 5.4) ] • 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. • 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 more rarely. Itching and burning, especially on the plantar site of the feet, may occur [see Warnings and Precautions (5.7) ] . • Musculoskeletal, Connective Tissue and Bone Disorders – Osteoporosis with long-term administration of heparin. • Metabolism and Nutrition Disorders – Hyperkalemia. • General Disorders and Administration Site Conditions – Erythema, mild pain, ulceration. • Elevations of Serum Aminotransferases – Significant elevations of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels have occurred in patients who have received heparin. • Others – 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 coagulation, platelet aggregation or drugs that counteract coagulation may induce bleeding. ( 7 )

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 acetylsalicylic acid, ibuprofen, indomethacin, and celecoxib), dextran, phenylbutazone, thienopyridines, dipyridamole, hydroxychloroquine, glycoprotein IIv/IIa 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 Medications that May Interfere with Heparin Digitalis, tetracyclines, nicotine, antihistamines, or intravenous nitroglycerine 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).