Overview
It's injected under the skin of the belly, often once or twice a day.
What it's used for
- Preventing clots after surgery or in the hospital
- Treating clots in the legs or lungs
- Heart attack and unstable angina (in the hospital)
- Clot prevention in pregnancy
How to take it
- Inject into the belly fat at least 2 inches from the belly button, alternating sides.
- Don't push out the air bubble in a prefilled syringe; don't rub the spot after.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Bruising or pain where injected
- Minor bleeding
Warnings
- Boxed warning: risk of spinal bleeding with spinal anesthesia or spinal taps.
- Doses depend on kidney function.
Other medicines, foods, and alcohol
- Aspirin, NSAIDs, and other blood thinners raise bleeding risk.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Commonly used for clots in pregnancy.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Enoxaparin (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.