Before using dalteparin, tell your doctor or pharmacist if you are allergic to it; or to heparins or pork products; or if you have any other allergies. This product may contain inactive ingredients (such as latex found in the needle shield), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: serious active bleeding, artificial heart valves, bleeding or blood disorders (low platelet counts), certain eye problems (hypertensive or diabetic retinopathy), high blood pressure, infection of the heart, kidney disease, liver disease, low platelet counts after previous heparin treatment, certain stomach/intestinal problems (such as active or recent ulcers), stroke, recent spinal procedures or puncture, spine problems (such as spinal deformity), recent eye/brain/spinal cord surgery.

Limit alcohol while taking this drug because it may increase the risk of stomach bleeding.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

To lower the chance of getting cut, bruised, or injured, use caution with sharp objects like razors and nail cutters, and avoid activities such as contact sports.

Older adults may be more sensitive to the side effects of this drug, especially bleeding.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

This medication passes into breast milk. Consult your doctor before breastfeeding.