The following clinically significant adverse reactions are described elsewhere in the labeling:
The following adverse reactions have been identified during postapproval 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 or establish a causal relationship to drug exposure.
Hemorrhage - Hemorrhage is the chief complication that may result from heparin therapy [see Warnings and Precautions (5.1)]. 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:
Vascular disorders – Contusion, vasospastic reactions (including episodes of painful, ischemic, and cyanosed limbs).
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 (5.5)].
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.
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