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Prevents blood clots.

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Prescription onlyLower-cost generic available

Our bottom line

Lovenox (Enoxaparin) is a good anticoagulant that reduces the risk of death or bleeding, and blood clots are less likely to happen. However, it is only available as an injection which isn't great if you're afraid of needles.


  • In a study that compared Lovenox (Enoxaparin) to other medications used to stop blood clots, there was a lower risk of clots coming back, with similar rates of major bleeding and mortality.
  • You don't need to go in for lab tests to check whether it's working, unlike other medications like warfarin that require regular blood draws.
  • Available in generic so it can be cheaper than other "blood thinners".
  • Good option if you're pregnant or have cancer.


  • It is only available as an injection, so it's not great if you're afraid of needles.
  • While surprise bleeding episodes can be treated while taking Lovenox (Enoxaparin), they won't completely work.
  • It doesn't work as well as other medications for "thinning the blood" if you are overweight, underweight, or if you have kidney disease.

Save on your next Lovenox (Enoxaparin) prescription

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  • (4) 40mg/0.4ml syringe
  • Cost for (4) 40mg/0.4ml syringes of Lovenox (Enoxaparin) at pharmacies

What to expect when you take Lovenox (Enoxaparin)

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Tips from our pharmacists
  • Rotate the spot where you inject Lovenox (Enoxaparin) every day.
  • While on this, it can take longer to stop bleeding and you are more likely to bruise or bleed more easily.
  • Avoid taking certain anti-inflammatory drugs (like NSAIDs) because they can make you more likely to bleed.
  • Can cause swelling in your legs, diarrhea, and nausea.
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Side effects for Lovenox (Enoxaparin)

From clinical trials of Lovenox / Blood clot prevention (30 mg)  ( 1195)

  • FeverFever5% for Lovenox vs.3% for placebo
  • Major hemorrhageMajor hemorrhage4% for Lovenox vs.0% for placebo
  • Excessive bleedingExcessive bleeding4% for Lovenox vs.3% for placebo
  • NauseaNausea3% for Lovenox vs.2% for placebo
  • Leg or ankle swellingLeg or ankle swelling3% for Lovenox vs.3% for placebo
  • Low red blood cellsLow red blood cells2% for Lovenox vs.7% for placebo
  • Swelling due to excess fluidSwelling due to excess fluid2% for Lovenox vs.2% for placebo
  • Major hemorrhageMajor hemorrhage1% for Lovenox vs.0% for placebo

Risks and Warnings for Lovenox (Enoxaparin)

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    • Higher risk if:
    • Spinal puncture (spinal tap)
    • Getting anesthesia in the spine (epidural anesthesia)
    • Taking NSAIDs or other blood thinning medicines

    You're more likely to have a blood clot in the spine if you're taking Lovenox (Enoxaparin) and are getting either a spinal tap or an epidural. Call your doctor immediately if you notice pain or a tingling or burning sensation, numbness, weakness, or inability to urinate.

    This is a black box warning. The FDA requires this warning when there is a significant risk of serious or life-threatening effects that anyone taking the drug should consider.

Means that some groups have a high risk of experiencing this side effect

Tips from pharmacists and people taking Lovenox (Enoxaparin)

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The FDA category for this medication is B. It is advised that you: Probably safe
  • Wave hand over injection site to dry off alcohol to prevent after injection burning sensation. Injection in upper abdomen, thigh injection was very unpleasant.
Kidneys and liver
  • Upsides and downsides from our pharmacists
  • It doesn't work as well as other medications for "thinning the blood" if you are overweight, underweight, or if you have kidney disease.