Prescription onlyLower-cost generic available

HeparinAlternatives

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Compare Heparin to alternatives

These medications are comparable to Heparin or used for similar purposes.

Heparin

Lovenox
(Enoxaparin)

Arixtra
(Fondaparinux)

Prevents blood clots. Heparin is a good anticoagulant that prevents blood clots. However, you'll need to get frequent blood tests to make sure it's working well.Prevents blood clots. 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.Coming soon.
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Reviews & ratings
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Side effects
HeparinLovenoxArixtra

We haven’t found good data for Heparin side effects.

FDA side effect reports for Heparin »
  • Injection site hematoma 7%
  • Fever 2%
  • Confusion 1%
  • Nausea 1%
More Lovenox side effects »

We haven’t found good data for Arixtra side effects.

FDA side effect reports for Arixtra »
How it works
HeparinLovenoxArixtra
Heparin is an anticoagulant that binds with proteins and platelets to stop blood clots from being made and traveling to the brain, heart, and lungs.Lovenox (Enoxaparin) is an anticoagulant that prevents certain blood-clotting proteins from working. By stopping blood clots from forming, there's a lower chance of having a stroke or blood clots travel to your lungs.Coming soon.
Type of medication
HeparinLovenoxArixtra
Anticoagulant
Heparin
Prescription only
Anticoagulant
Heparin
Prescription only
Coming soon.
Available as
HeparinLovenoxArixtra
  • Injection
  • Injection
  • Injection
Used for (click to learn more)
HeparinLovenoxArixtra
  • Deep venous thrombosis
Risk factors for serious side effects
HeparinLovenoxArixtra
  • History of bleeding problems
  • Severe high blood pressure
  • Older age
  • Heparin-induced thrombocytopenia
Detailed Heparin risks & warnings »
Coming soon.Coming soon.
Pregnancy category
HeparinLovenoxArixtra
CFDA pregnancy category (Weigh risks vs. benefits)

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

See the FDA package insert
BFDA pregnancy category (Probably safe)

Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

See the FDA package insert
BFDA pregnancy category (Probably safe)

Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

See the FDA package insert
Alcohol
No specific alcohol-related info.No specific alcohol-related info.No specific alcohol-related info.
Food
No specific food-related info.No specific food-related info.No specific food-related info.
Kidneys and liver
No specific kidneys and liver-related info.
  • It doesn't work as well as other medications for "thinning the blood" if you are overweight, underweight, or if you have kidney disease.
No specific kidneys and liver-related info.
Sex
No specific sex-related info.No specific sex-related info.No specific sex-related info.
Sleep
No specific sleep-related info.No specific sleep-related info.No specific sleep-related info.
Weight
No specific weight-related info.No specific weight-related info.No specific weight-related info.
Upsides and benefits
HeparinLovenoxArixtra
  • Safe to use in pregnancy and if you're breast feeding.
  • There are other medications that can help stop unexpected bleeding while taking Heparin.
  • Available as a generic medication.
  • Usually used in the hospital, but can be given at home too.
  • 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.
Coming soon.
Downsides and risks
HeparinLovenoxArixtra
  • You'll need to get labs/blood draws done on a regular basis to make sure the drug is working and to make sure you don't get unexpected side effects.
  • You can be at higher risk for bleeding or clotting while taking Heparin compared to other anticoagulants.
  • 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.
Coming soon.
Tips from our pharmacists for people taking the medication
HeparinLovenoxArixtra
  • Make sure to change where you inject Heparin every time.
  • Don't take aspirin or other anti-inflammatory medications without talking to your doctor first.
  • You will have to do regular blood draws or labs to make sure that Heparin is working for you.
  • 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.
Coming soon.
Learn more
More about HeparinSide effectsReviews & ratingsAlternativesFDA package insert
More about LovenoxSide effectsReviews & ratingsFDA package insert
More about ArixtraSide effectsFDA package insert