Not to be administered by IM inj. Do not mix w/ other inj for infusion. Patients w/ bleeding diathesis, uncontrolled arterial HTN or history of recent GI ulceration, diabetic retinopathy, & hemorrhage. Initiate appropriate therapy if thromboembolic events occur despite prophylaxis. Discontinue agents which may enhance risk of hemorrhage prior to initiation of therapy. Use w/ extreme caution in patients w/ history of heparin-induced thrombocytopenia; conditions w/ increased risk of hemorrhage eg, bacterial endocarditis, congenital or acquired bleeding disorders, active ulcerative & angiodysplastic GI disease, hemorrhagic stroke, or shortly after brain, spinal, or ophthalmological surgery, or in patients treated concomitantly w/ platelet inhibitors. Major hemorrhages including retroperitoneal & intracranial bleeding; bleeding can occur at any site during therapy. Observe low-wt patients carefully for signs & symptoms of bleeding. Use during pregnancy only if clearly needed. Elderly who may show delayed elimination of enoxaparin.